2020 Zucchini Squash Cultivar Evaluations
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Collapse ▲Hort. Series # 237
Principle Investigators
Jonathan R. Schultheis, Professor and Extension Specialist
Keith D. Starke, Agricultural Research Associate
Maxton D. Collins, Research Assistant
General Cultural Practices
The squash study was established on white plastic mulch. Pesticides used on all plots were chemicals labeled for that crop, 2019 North Carolina Agricultural Chemicals Manual.
Acknowledgments
We gratefully acknowledge the assistance of Cathy Herring, (Superintendent), and Charles Barrow, (Horticulture Supervisor, Central Crops Research Station, Clayton, NC), as well as, the personnel at the research station for their help in establishing, maintaining, and harvesting the squash cultivar evaluation study. We want to acknowledge the following summer employees for their assistance with the study: Benjamin Indermaur, Tanner Seay, Daria Slack, as well as, graduate student; Alyssa Woodard. We would also like to thank Joy Smith for conducting the statistical analysis on the data that were collected in this study. The cooperation and support from Bejo, Enza Zaden, HM Clause, Rijk Zwaan, Sakata, Seedway, Seminis, Syngenta and VoloAgri are also appreciated. This research was also supported by a grant from USDA National Institute of Food and Agriculture Specialty Crop Research for the CucCAP Specialty Crop Research Initiative grant under award number 2015-51181-24285.
Disclaimer
This publication presents data from the cultivar evaluation study conducted during 2020. Information in this report is believed to be reliable but should not be relied upon as a sole source of information. Limited accompanying detail is included but excludes some pertinent information, which may aid interpretation.
Table 1. Zucchini Squash Sources and Descriptions; 2020.
Cultigen |
Seed Company |
Description |
| Cardea | Seedway | Medium green fruit; mostly straight with wider taper at blossom end; slight ridging entire length of fruit; average peduncle; fruits not all perfect shapes, with intermittent bulges throughout the length of the fruit; generally produced more marketable fruit across all harvests compared with other entries. |
| Cash Machine | Enza Zaden | Medium to dark green fruit; straight fruit with moderate taper at blossom end; slight ridging along entire fruit but not very discernable; average peduncle; very smooth fruit; most compact plant of all entries. |
| Green Machine | Enza Zaden | Medium green fruit; most fruit straight with no taper; ridging entire length of fruit; compact to average peduncle; fruit in 12th harvest were generally all too short; speckling more apparent than most other entries. |
| Leopard | HM Clause | Medium to dark green fruit; generally straight fruit but some have slight curve; fruit taper at blossom end; very slight ridging at stem end of fruit; average peduncle; pronounced speckling give fruit slightly lighter green appearance; intermittent bulging along the length of fruit. |
| Respect | HMClause | Generally dark green fruit; mostly straight fruit with taper at blossom end; ridging along length of fruit; compact to average peduncle; fruits throughout entire trial did not size and appeared to lack adequate significant pollination; multiple fruit on plants remained small and these fruit all had dark green color. |
| Spineless King | Seedway | Medium green fruit; straight fruit with slight taper at blossom end; slight ridging mainly on stem end; average peduncle; fruit were generally longer than desirable for markets; fairly pronounced speckling on fruit. |
| Spineless Supreme | Syngenta | Medium to dark green fruit; generally straight fruit with slight taper at blossom end; slight ridging primarily near stem end; compact to average peduncle; most fruit had bulging along the entire length, which diminished fruit quality. |
| Tribute | HM Clause | Medium green fruit; generally straight fruit with taper at blossom end; slight ridging at stem end; average peduncle; a few fruit with tendency to slightly bulb at blossom end; speckling noticable. |
| 23-147 | RijkZwann | Medium to dark green fruit; generally straight fruit with slight taper at blossom end; very slight ridging entire length of fruit; average to long peduncle; limited marketable fruit to make ratings because most were culls. |
| 1023-401 | Rijk Zwann | Dark green fruit; generally straight with slight taper at blossom end; slight ridging primarily at stem end; average to long peduncle; many fruits had bulges or had bulbous blossom end resulting in more culls and lower fruit grades. |
| 697 | Seedway | Mainly dark green fruit; generally straight fruit withtaper; slight ridging entire length of fruit; compact peduncle; some fruit tend to have skinny neck at stemend. |
| A10129 | Bejo | Medium to dark green fruit; straight fruit with taper atblossom end; slight ridging the entire length of fruit;average peduncle; slight bulging along length of fruit. |
| A10131 | Bejo | Medium to dark green fruit; mainly straight with widertaper at blossom end; pronounced riding entire lengthof fruit; average peduncle; fruit tend to be longer thanmost other entries. |
| A10133 | Bejo | Medium to dark green fruit; straight fruit with slighttaper at blossom end; slight ridging at stem end offruit; average peduncle; tendency to have bend onsome fruit at stem end. |
| A10138 | Bejo | Medium to dark green fruit; mainly straight fruit withslight taper at blossom end; slight ridging entire length of fruit; compact to average peduncle; does have atendency to produce long, skinny fruit that may not taper. |
| A10139 | Bejo | Dark green fruit; straight fruit with very slight taper at blossom end; minimal ridging entire length of fruit;compact to average peduncle; slender/longer fruit notsuitable for markets. |
| A10141 | Bejo | Medium to dark green fruit; straight fruit with taper atblossom end; slight ridging at stem end of most fruit;average peduncle; several fruit had slight bend along middle of fruit. |
| Bejo Experimental 10 | Bejo | Medium green fruit; straight with wider taper atblossom end; slight ridging entire length of fruit;average peduncle; good legnth to width ratio. |
| E28Z.0069 | Bejo | Medium green fruit; generally straight fruit with wider taper at blossom end; slight ridging entire length offruit; compact to average peduncle; tendency for most fruit to have skinny or constricted neck at stem end. |
| HMC 2439 | HM Clause | Medium to dark green fruit; straight fruit with slight taper at blossom end; generally very slight ridging at stem end of fruit; compact to average peduncle; severe bulging along length of several fruit casuing them to be classified as grade 2 or culled. |
| SVYG 0914 | Seminis | Medium to dark green fruit; straight fruit with taper at blossom end; slight ridging at stem end; long peduncle size; neck on some fruit slightly skinnier than desirable; majority of fruit with good market fruit length width dimensions. |
| SVYG 9956 | Seminis | Medium to dark green fruit; straight fruit with taper at blossom end; very slight ridging mainly at stem end of fruit; long peduncle; fruit length width ratio good for markets. |
| USAS 17150 | VoloAgri | Medium green fruit; straight fruit with moderate taper at blossom end; slight ridging at stem end; compact to average peduncle; pronounced speckling; most consistent producer in study with respect to fruit shape. |
| XSQ 4508 | Sakata | Medium to dark green fruit; generally straight fruit with taper at blossom end; slight ridging entire length of fruit; compact to average peduncle; several fruit with noticable bulges resulting in less attractive appearance and demotion to grade 2 fruit. |
Figure 1. Zucchini Squash photographs, Clayton, NC, 2020.
Zucchini Squash Cultural Practices for 2020 Cultivar Study, Central Crops Research Station; Clayton, NC
Introduction
Summer squash production in North Carolina totaled 4,600 acres in 2019 according to the most recent agricultural data. This was an increase of 800 acres from 2018 when summer squash production was reported to be 3,800 acres. More impressive was the $20.3 million dollar crop value of the 2019 squash crop, which surpassed the previous years’ crop by more than $2 million dollars (2019 State of NC Agriculture Overview). Summer squash ranks among the top 10 vegetables grown in North Carolina with Cleveland County (south central North Carolina) producing the greatest acreage of squash in the state. Moreover, summer squash remains an important crop to North Carolina producers as the state is ranked 5th among those states that produced the crop nationwide in 2019 (View data from the USDA Economic Research Service). North Carolina growers have maintained their competitiveness through producing squash cultivars that are highly desired by the consumer. In an effort to remain competitive in the marketplace and maximize profitability most growers seek to grow squash cultivars that will provide them with the highest yields and greatest overall fruit quality. The zucchini market in North Carolina has typically been supplied with a fruit that is medium green in color; however, some markets have seen increased demand for cultivars that produce a darker green fruit. Summer squash plantings in North Carolina typically experience higher incidence of disease and insect pressure since they are harvested in the fall when environmental factors favor increased presence of these plant pests and pathogens. In 2020 the field study was planted on 2 June and we began harvesting on 8 July. The squash were rated for marketable and nonmarketable yields, for early and late production, and for consistency of production throughout the harvest period. Quality measurements were collected and average plant stand counts were determined to conduct the most complete evaluation of each cultivar in the field study. We again included the number of fruit produced per plant over various harvest intervals, and for the entire production season to compliment the yield data.
2020 Zucchini Squash Cultivar Evaluations at the Central Crops Research
Station in Clayton, NC
Materials and Methods
Seeds were sown on 2 June 2020. Hills with seed skips were replanted 10 days after planting to maximize plant stand counts in each plot. Final stand counts were determined on 19 June (17 days after initial planting). The study area was treated with Telone C-17 (10 gal/ac) on 21 November 2019. A broadcast application of 12-6-24 pre-plant fertilizer (400 lb/ac) was made across the entire study area on 20 March 2020. White plastic mulch (1.25 mil thick high density film, 48 inches wide; B.B. Hobbs, Clinton, NC) and drip irrigation tape (NETAFIM, 12 inch spacing, 0.24 gal/min.; NETAFIM, Tel Aviv, Israel) was laid out in the field on 20 March 2020. The herbicides Gramoxone (3 qts/ac), Roundup (1 qt/ac) and Prefar (5 qts/ac) were applied as a on a rotational basis beginning 7 May and on the following dates: 3 and 30 June; 1 and 30 July 2020. The insecticides Assail and FanFare, were applied on a rotational basis as a preventative measure beginning 10 June and on the following dates: 18 and 25 June; 8, 16, 22, and 29 July; 6 August 2020. The following fungicide products were applied as a preventive measure and on a rotational basis throughout the entire growing season: Pristine, Procure, Ranman, and Vivando.
The first fungicide application was made on 18 June; and on the following dates: 25 June; 1, 8, 16, and 22 July 2020. Liquid fertilizer (4-0-8) was applied through drip irrigation beginning 24 June and on the following dates: 1, 8, 15, 22, 29 July; 3 and 12 August 2020. A total of 55.5 gallons of 4-0-8 liquid fertilizer was applied throughout the season. Harvests were conducted three times per week. The first harvest was 8 July and the final harvest (#12) was completed on 3 August 2020. The study was maintained with fertilizer applications until 12 August meanwhile fungicide treatments were discontinued on 6 August in order to facilitate powdery mildew to develop. Two ratings to assess susceptibility to powdery mildew were taken on 14 and 20 August 2020.
Most fruit were harvested when the blossom was detached from the fruit, and then categorized as marketable or non-marketable. Typically, marketable fruit would be graded into number one ‘fancy fruit’, while fruit that were slightly off in shape or color but still very marketable would be graded as number two fruit. Fruit that were small or apparently not pollenated, or were misshapen, were categorized as culls (non-marketable). Graded fruit were weighed and counted for each category and plot. The study design was a randomized complete block with four replications. In addition to yield, other quality measurements taken were: percent plant stand and average fruit length and width, plant architecture, fruit color, and spine ratings of the plant.
Results
Photographs of marketable fruit were taken on 15 and 31 July 2020; 7 and 14 August 2020 (Figure 1). Representative photos were also taken of zucchini fruit grades (Figure 2) and fruit shapes (Figure 3). A description of each zucchini cultivar is provided in (Table 1). This subjective information compliments the objective data presented in the remainder of the study (Tables 2- 12). The highest yielding (> 450 boxes/acre) cultigens (advanced line or cultivar) for marketable fruit in early harvests (1-4) were Cardea, Cash Machine, 23-401, Bejo Experimental 10, HMC 24939, SVYG9956, and XSQ4508 while the lowest yielding (< 250 boxes/acre) were Spineless Supreme, 23-147, and A10131 (Table 2). Mid-season included 4 harvests (5-8) (Table 2). On average yields were higher in the early-season versus the mid-season or late season harvests (9-12). The highest yielding mid-season cultigens (> 450 boxes/acre) for marketable fruit were Cash Machine, 23-401, HMC 24939, SVYG9956 and USAS 17150. Cultigens with the highest marketable yields (>350 boxes/acre) in the late season harvests (9-12) were Cardea, 23-401, HMC 24939, SVYG9956 and USAS 17150 (Table 2). The highest cull fruit production was in the late season harvests for all cultigens except A10139 and A10141 (Table 2). The cultigens that produced the most culls (>125 boxes/acre) were Cash Machine, Green Machine, Respect, Tribute, 23-147 and XSQ4508 (Table 2). No virus symptoms were observed in any fruit.
Marketable yields across all harvests (12) were greatest (> 1200 boxes/acre) for Cardea, Cash Machine, 23-401, HMC 24939, SVYG9956 and USAS 17150 while Respect, Spineless Supreme, 23-147, A10131 and A10141 had the lowest marketable yields (<800 boxes/acre) (Table 3). Fruit grade percentages across all harvests averaged 67% for number one fruit and 16% for number two fruit. The cultigens that produced the highest percentage of number one fruit (>75%) were Leopard, 23-401, 697, Bejo Experimental 10, E28Z.00697, SVYG9956 and USAS 17150. The cultigens with the lowest cull fruit production (<10%) were Leopard, 23-401, Bejo Experimental 10, SVYG9956 and USAS 17150. Disease pressure was minimal throughout the season in this study. Marketable fruit averaged 83% across all entries for the season (Table 3). Entries above the marketable fruit average were Cardea, Leopard, Spineless King and 23- 401, 697, A10133, Bejo Experimental 10, E28Z.00697, HMC 24939, SVYG0914, SVYG9956, USAS 17150 and XSQ4508. The entries with the highest cumulative yield (12 harvests) of marketable fruit were SVYG9956 (1400 boxes/acre) followed by 23-401 (1362 boxes/acre), USAS 17150 (1354 boxes/acre), HMC 24939 (1322 boxes/acre) and Cash Machine (1317 boxes/acre).
The highest percentage of marketable squash, averaged across entries, was obtained in the early season harvests (1-4) (89%) followed by mid-season harvests (5-8) (86%) and late season harvests (9-12) (74 %) (Table 4). The percentage yield of marketable fruit was especially high for Leopard, HMC 24939 and SVYG9956 (97%) for early season harvests (1-4); 23-401 (99%) and USAS 17150 (97%) for mid-season harvests (5-8); and for late season harvests (9-12) USAS 17150 (95%). Fruit quality declined throughout the season with the highest percentage of number one fruit occurring in the early season harvests (76%) and the lowest percentage of number one fruit occurring in the late season harvests (52%). Similarly, the lowest percentage of number two fruit occurred in the early season harvests (13%) and increased throughout the remaining harvests.
The average number of fruit per plant for each entry during three harvest intervals are shown in Table 5. Cumulative marketable fruit weight per plant over all harvests (12) averaged 4.7 lbs (Table 6), while cumulative marketable fruit number per plant averaged 12 and comprised 70% of the fruit harvested (Table 7).
The cumulative number of fruits per acre for each cultigen across all harvests (12) and for each grade are provided in (Table 8). The number of fruits per acre for each cultigen for early season harvests (1-4), mid-season harvests (5-8) and late season harvests (9-12) are provided in Table 9, with corresponding percentages in Table 10.
Plant stands were excellent with no cultigens averaging less than 95%. Data for fruit length and width were collected from four separate harvests (Table 11). Length and width of five marketable fruit per plot were taken in order to obtain an average length/width ratio for marketable fruit. In this study, cultigens that produced the longest fruit were A10138, Tribute, and A10131. In addition, all plots in the study were rated for the following characteristics: plant architecture (open or closed stalk positioning/density), plant vigor, fruit color, presence or absence of spines and powdery mildew resistance (Table 12). Cultigens with a dense architecture included Cash Machine and Spineless King, while cultigens with more openness were XSQ4508 and A10131 (Table 12). Cultigens with few or no spines were Spineless King, Spineless Supreme, and USAS 17150. The most vigorous vine growth was recorded on Cardea, while the cultigen with the least vigorous vines was HMC 24939 (Table 12). The cultigens with the lowest average incidence of powdery mildew were A10131, Bejo Experimental 10, A10139 and A10141 (Table 12).
Figure 2 (top) Zucchini Squash Fruit Grades: US #1 – fancy, US #2, and Cull
Figure 3 (bottom) Illustration of intermittent bulging exhibited in some zucchini squash fruit throughout all harvests.
Summary
Overall, yields and fruit quality in this study were below average. Fruit grades diminished throughout the study with number two fruit and culls increasing as the season progressed. This study was planted nearly five weeks later than usual due to the COVID-19 pandemic. Exceptionally high heat indexes throughout the growing season may have had a negative impact on the study. We observed predominantly male flowers on the squash plants throughout July, which may have negatively impacted plant fruit set potential and the shape of set fruit. This could explain the low yield that occurred in the study. We have observed much higher yields in past years when plantings were made earlier in the season insert linkS uash booklet on CuCap webpage for 2018 and 2019 . Despite the later plant date neither insect pests nor disease pressure was an issue throughout the season.
Table 2. Zucchini Squash cultigen study yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated treatments. Clayton, NC, 2020.¹
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
Culls |
Total |
||||||||
Harvests |
Harvests |
Harvests |
Harvests |
|||||||||
1 – 4 |
5 – 8 |
9-12 |
1 – 4 |
5 – 8 |
9 -12 |
1 – 4 |
5 – 8 |
9 -12 |
1 – 4 |
5 – 8 |
9 -12 |
|
| Cardea | 462 | 337 | 276 | 29 | 43 | 96 | 39 | 35 | 102 | 530 | 415 | 475 |
| Cash Machine | 432 | 389 | 219 | 53 | 123 | 101 | 43 | 96 | 160 | 528 | 607 | 480 |
| Green Machine | 317 | 295 | 120 | 103 | 115 | 152 | 43 | 62 | 147 | 463 | 472 | 419 |
| Leopard | 362 | 269 | 248 | 60 | 66 | 67 | 13 | 26 | 42 | 435 | 361 | 358 |
| Respect | 257 | 94 | 90 | 52 | 54 | 65 | 24 | 74 | 206 | 333 | 222 | 360 |
| Spineless King | 309 | 296 | 149 | 36 | 58 | 97 | 17 | 18 | 60 | 362 | 372 | 306 |
| Spineless Supreme | 203 | 227 | 126 | 22 | 66 | 61 | 12 | 60 | 82 | 237 | 354 | 269 |
| Tribute | 273 | 262 | 221 | 63 | 86 | 94 | 89 | 82 | 126 | 426 | 430 | 441 |
| 23-147 | 172 | 160 | 42 | 41 | 108 | 73 | 64 | 91 | 178 | 278 | 359 | 292 |
| 1023-401 | 439 | 490 | 304 | 42 | 19 | 68 | 26 | 4 | 40 | 507 | 513 | 412 |
| 697 | 338 | 260 | 247 | 20 | 20 | 50 | 34 | 43 | 52 | 392 | 323 | 349 |
| A10129 | 268 | 266 | 168 | 71 | 66 | 82 | 96 | 53 | 94 | 434 | 386 | 344 |
| A10131 | 195 | 166 | 163 | 49 | 53 | 48 | 50 | 73 | 87 | 293 | 292 | 299 |
| A10133 | 356 | 307 | 235 | 79 | 65 | 92 | 30 | 30 | 121 | 466 | 403 | 448 |
| A10138 | 252 | 255 | 196 | 98 | 79 | 82 | 53 | 36 | 104 | 403 | 370 | 383 |
| A10139 | 304 | 211 | 221 | 75 | 58 | 61 | 94 | 74 | 81 | 473 | 343 | 363 |
| A10141 | 244 | 157 | 194 | 66 | 71 | 57 | 82 | 84 | 73 | 393 | 312 | 324 |
| Bejo Exp. 10 | 441 | 312 | 228 | 59 | 25 | 109 | 36 | 12 | 31 | 535 | 348 | 368 |
| E28Z.0069 | 352 | 262 | 261 | 11 | 29 | 45 | 26 | 30 | 53 | 389 | 322 | 359 |
| HMC 2439 | 437 | 404 | 248 | 30 | 67 | 137 | 16 | 36 | 121 | 482 | 507 | 506 |
| SVYG 0914 | 319 | 291 | 173 | 13 | 45 | 54 | 30 | 30 | 66 | 362 | 366 | 294 |
| SVYG 9956 | 515 | 423 | 241 | 25 | 69 | 128 | 14 | 22 | 90 | 553 | 513 | 459 |
| USAS 17150 | 377 | 434 | 433 | 22 | 31 | 58 | 19 | 13 | 26 | 418 | 478 | 516 |
| XSQ 4508 | 399 | 241 | 164 | 80 | 66 | 82 | 31 | 32 | 126 | 510 | 339 | 372 |
| Average | 334 | 284 | 207 | 50 | 62 | 82 | 41 | 47 | 94 | 425 | 392 | 383 |
| LSD (0.05) | 314 | 250 | 190 | 62 | 77 | 74 | 74 | 86 | 88 | 296 | 237 | 192 |
¹Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, 22 and 24 July; Harvests 9-12 occurred 27, 29 and 31 July; 3 August 2020.
²Culls consisted primarily of misshaped fruit.
Table 3. Zucchini Squash cultigen study yields, cumulative boxes, (20 lbs.), per acre, among all harvests¹. Clayton, NC, 2020.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
Culls² |
Total |
Percent (%) |
|||
Fruit Grade#1 |
Fruit Grade#2 |
Total |
Cull |
|||||
| Cardea | 1075 | 168 | 176 | 1419 | 75 | 12 | 87 | 13 |
| Cash Machine | 1040 | 277 | 299 | 1616 | 64 | 17 | 81 | 19 |
| Green Machine | 732 | 369 | 252 | 1353 | 52 | 28 | 80 | 20 |
| Leopard | 880 | 193 | 81 | 1154 | 76 | 17 | 93 | 7 |
| Respect | 441 | 171 | 304 | 916 | 48 | 18 | 66 | 34 |
| Spineless King | 754 | 191 | 95 | 1040 | 72 | 18 | 90 | 10 |
| Spineless Supreme | 556 | 149 | 155 | 860 | 62 | 18 | 80 | 20 |
| Tribute | 757 | 243 | 297 | 1296 | 58 | 19 | 76 | 24 |
| 23-147 | 374 | 222 | 333 | 929 | 40 | 24 | 64 | 36 |
| 23-401 | 1233 | 129 | 70 | 1432 | 86 | 9 | 95 | 5 |
| 697 | 845 | 90 | 129 | 1064 | 79 | 8 | 88 | 12 |
| A10129 | 702 | 219 | 242 | 1163 | 57 | 19 | 76 | 24 |
| A10131 | 524 | 151 | 210 | 885 | 56 | 18 | 74 | 26 |
| A10133 | 898 | 237 | 182 | 1317 | 68 | 18 | 86 | 14 |
| A10138 | 702 | 259 | 194 | 1156 | 60 | 22 | 82 | 18 |
| A10139 | 736 | 194 | 249 | 1179 | 62 | 17 | 78 | 22 |
| A10141 | 595 | 195 | 239 | 1029 | 56 | 19 | 76 | 24 |
| Bejo Experimental 10 | 980 | 192 | 79 | 1251 | 78 | 15 | 93 | 7 |
| E28Z.00697 | 875 | 85 | 109 | 1069 | 81 | 8 | 89 | 11 |
| HMC 24939 | 1089 | 234 | 173 | 1495 | 72 | 16 | 88 | 12 |
| SVYG0914 | 783 | 112 | 126 | 1021 | 72 | 12 | 85 | 15 |
| SVYG9956 | 1178 | 222 | 126 | 1526 | 77 | 14 | 92 | 8 |
| USAS 17150 | 1244 | 111 | 57 | 1412 | 88 | 8 | 96 | 4 |
| XSQ4508 | 804 | 227 | 190 | 1221 | 65 | 19 | 84 | 16 |
| Average | 825 | 193 | 182 | 1200 | 67 | 16 | 83 | 17 |
| LSD (0.05) | 604 | 133 | 179 | 563 | 27 | 23 | 23 | 23 |
¹Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, occurred on
22 and 24 July; Harvests 9-12 occurred 27, 29 and 31 July; 3 August 2020.
²Culls consisted primarily of misshaped fruit.
Table 4. Zucchini Squash cultigen study yields¹. Percentage marketable US 1 and US 2 grade fruits and culls, and fruit per indicated harvests by number of 20 lb boxes for replicated treatments. Clayton, NC, 2020.
Percentage (%) of yield based upon grade.
Cultigen |
Fruit Grade #1 |
Fruit Grade#2 |
||||
Harvests1 – 4 |
Harvests5 – 8 |
Harvests9 – 12 |
Harvests1 – 4 |
Harvests5 – 8 |
Harvests9 – 12 |
|
| Cardea | 87 | 82 | 58 | 5 | 10 | 21 |
| Cash Machine | 82 | 62 | 45 | 10 | 21 | 20 |
| Green Machine | 66 | 59 | 29 | 24 | 25 | 36 |
| Leopard | 83 | 74 | 69 | 14 | 18 | 18 |
| Respect | 75 | 43 | 23 | 16 | 21 | 18 |
| Spineless King | 85 | 79 | 49 | 10 | 15 | 32 |
| Spineless Supreme | 81 | 63 | 46 | 12 | 19 | 21 |
| Tribute | 63 | 60 | 48 | 16 | 20 | 22 |
| 23-147 | 59 | 45 | 14 | 16 | 29 | 25 |
| 23-401 | 87 | 96 | 73 | 8 | 4 | 17 |
| 697 | 85 | 80 | 70 | 6 | 6 | 14 |
| A10129 | 56 | 65 | 47 | 19 | 17 | 22 |
| A10131 | 61 | 53 | 53 | 19 | 19 | 16 |
| A10133 | 76 | 77 | 51 | 18 | 16 | 21 |
| A10138 | 61 | 69 | 50 | 24 | 21 | 22 |
| A10139 | 62 | 60 | 61 | 16 | 16 | 17 |
| A10141 | 57 | 51 | 59 | 18 | 23 | 18 |
| Bejo Experimental 10 | 82 | 89 | 61 | 11 | 7 | 30 |
| E28Z.00697 | 89 | 80 | 73 | 3 | 9 | 12 |
| HMC 24939 | 90 | 79 | 49 | 7 | 13 | 27 |
| SVYG0914 | 86 | 76 | 53 | 5 | 14 | 20 |
| SVYG9956 | 93 | 82 | 52 | 5 | 13 | 28 |
| USAS 17150 | 90 | 91 | 84 | 5 | 6 | 11 |
| XSQ4508 | 77 | 71 | 40 | 17 | 19 | 24 |
| Average | 76 | 70 | 52 | 13 | 16 | 21 |
| LSD (0.05) | 32 | 35 | 32 | 32 | 17 | 17 |
Percentage (%) of yield based upon grade.
Cultigen |
Culls |
Marketable |
||||
Harvests1 – 4 |
Harvests5 – 8 |
Harvests9 – 12 |
Harvests1 – 4 |
Harvests5 – 8 |
Harvests9 – 12 |
|
| Cardea | 8 | 9 | 22 | 92 | 91 | 78 |
| Cash Machine | 8 | 17 | 34 | 92 | 83 | 66 |
| Green Machine | 10 | 16 | 35 | 90 | 84 | 65 |
| Leopard | 3 | 8 | 12 | 97 | 92 | 88 |
| Respect | 9 | 36 | 59 | 91 | 64 | 41 |
| Spineless King | 5 | 6 | 19 | 95 | 94 | 81 |
| Spineless Supreme | 7 | 18 | 33 | 93 | 82 | 67 |
| Tribute | 20 | 20 | 30 | 80 | 80 | 70 |
| 23-147 | 26 | 26 | 61 | 74 | 74 | 39 |
| 23-401 | 5 | 1 | 10 | 95 | 99 | 90 |
| 697 | 9 | 14 | 16 | 91 | 86 | 84 |
| A10129 | 25 | 18 | 31 | 75 | 82 | 69 |
| A10131 | 20 | 27 | 31 | 80 | 73 | 69 |
| A10133 | 6 | 7 | 28 | 94 | 93 | 72 |
| A10138 | 16 | 10 | 28 | 84 | 90 | 72 |
| A10139 | 22 | 23 | 22 | 78 | 77 | 78 |
| A10141 | 25 | 26 | 23 | 75 | 74 | 77 |
| Bejo Experimental 10 | 7 | 4 | 9 | 93 | 96 | 91 |
| E28Z.00697 | 8 | 11 | 14 | 92 | 89 | 86 |
| HMC 24939 | 3 | 7 | 24 | 97 | 93 | 76 |
| SVYG0914 | 9 | 10 | 27 | 91 | 90 | 73 |
| SVYG9956 | 3 | 5 | 20 | 97 | 95 | 80 |
| USAS 17150 | 5 | 3 | 5 | 95 | 97 | 95 |
| XSQ4508 | 6 | 10 | 36 | 94 | 90 | 64 |
| Average | 11 | 14 | 26 | 89 | 86 | 74 |
| LSD (0.05) | 23 | 29 | 30 | 23 | 29 | 30 |
¹Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, 22 and
24 July; Harvestrs 9-12 occurred 27, 29 and 31 July; 3 August 2020.
²Culls consisted primarily of misshaped fruit.
Table 5. Zucchini Squash cultigen study yields¹, average number of fruit per plant, per indicated harvests for replicated treatments.Clayton, NC, 2020.
Number of fruit per plant per harvest period²
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
||||
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
|
| Cardea | 4.1 | 3.4 | 3.1 | 0.3 | 0.7 | 1.2 |
| Cash Machine | 4.4 | 4.3 | 2.8 | 0.9 | 1.7 | 1.4 |
| Green Machine | 3.2 | 3.5 | 2.3 | 1.6 | 1.7 | 2.3 |
| Leopard | 3.4 | 2.9 | 3.4 | 1.3 | 1.1 | 1.0 |
| Respect | 3.2 | 1.5 | 1.6 | 1.3 | 0.9 | 1.3 |
| Spineless King | 2.8 | 2.7 | 2.0 | 0.6 | 0.7 | 1.1 |
| Spineless Supreme | 2.3 | 2.5 | 2.1 | 0.7 | 0.8 | 0.9 |
| Tribute | 2.4 | 3.1 | 2.5 | 1.1 | 1.1 | 1.1 |
| 23-147 | 2.0 | 1.9 | 0.8 | 0.9 | 1.2 | 0.9 |
| 1023-401 | 3.7 | 3.9 | 3.3 | 0.6 | 0.3 | 0.7 |
| 697 | 3.6 | 2.3 | 2.9 | 0.4 | 0.3 | 0.5 |
| A10129 | 3.0 | 3.0 | 2.2 | 1.4 | 1.1 | 1.1 |
| A10131 | 2.2 | 2.1 | 2.1 | 1.0 | 1.0 | 0.8 |
| A10133 | 3.4 | 3.3 | 2.9 | 1.3 | 0.9 | 1.2 |
| A10138 | 3.1 | 3.9 | 3.1 | 1.8 | 1.4 | 1.8 |
| A10139 | 3.2 | 2.8 | 3.0 | 1.2 | 0.8 | 0.9 |
| A10141 | 2.4 | 2.1 | 2.5 | 1.4 | 1.3 | 0.9 |
| Bejo Exp. 10 | 4.8 | 3.9 | 2.7 | 0.8 | 0.5 | 1.2 |
| E28Z.0069 | 3.9 | 2.9 | 2.7 | 0.3 | 0.4 | 0.6 |
| HMC 2439 | 4.4 | 4.2 | 2.9 | 0.5 | 0.7 | 1.6 |
| SVYG 0914 | 3.0 | 3.2 | 2.3 | 0.4 | 0.6 | 0.6 |
| SVYG 9956 | 4.9 | 4.3 | 2.9 | 0.3 | 0.9 | 1.5 |
| USAS 17150 | 3.3 | 3.6 | 3.8 | 0.3 | 0.3 | 0.5 |
| XSQ 4508 | 3.9 | 3.0 | 2.2 | 1.4 | 1.1 | 1.5 |
| Average | 3.4 | 3.1 | 2.6 | 0.9 | 0.9 | 1.1 |
| LSD (0.05) | 2.3 | 2.4 | 2.6 | 1.3 | 0.8 | 1.0 |
Number of fruit per plant per harvest period²
Cultigen |
Culls³ |
Marketable |
||||
Harvests
|
Harvest
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
|
| Cardea | 0.7 | 0.8 | 3.2 | 4.5 | 4.0 | 4.3 |
| Cash Machine | 1.1 | 2.7 | 4.9 | 5.3 | 6.0 | 4.2 |
| Green Machine | 0.9 | 2.0 | 4.0 | 4.8 | 5.2 | 4.6 |
| Leopard | 0.4 | 0.6 | 1.7 | 4.7 | 4.0 | 4.4 |
| Respect | 0.7 | 2.2 | 7.8 | 4.5 | 2.4 | 2.8 |
| Spineless King | 0.5 | 0.4 | 2.2 | 3.4 | 3.4 | 3.1 |
| Spineless Supreme | 0.3 | 1.9 | 2.9 | 3.0 | 3.2 | 2.9 |
| Tribute | 1.9 | 2.1 | 2.8 | 3.6 | 4.2 | 3.7 |
| 23-147 | 2.0 | 3.4 | 5.8 | 2.8 | 3.1 | 1.6 |
| 1023-401 | 0.5 | 0.2 | 1.2 | 4.3 | 4.2 | 4.0 |
| 697 | 1.7 | 1.8 | 2.8 | 4.0 | 2.6 | 3.4 |
| A10129 | 2.5 | 1.7 | 2.9 | 4.4 | 4.1 | 3.3 |
| A10131 | 1.6 | 2.3 | 2.9 | 3.2 | 3.1 | 2.9 |
| A10133 | 0.6 | 0.7 | 2.4 | 4.6 | 4.1 | 4.0 |
| A10138 | 1.1 | 1.0 | 2.9 | 4.9 | 5.2 | 4.9 |
| A10139 | 1.9 | 2.1 | 2.4 | 4.4 | 3.6 | 3.9 |
| A10141 | 2.0 | 2.2 | 2.1 | 3.9 | 3.4 | 3.4 |
| Bejo Exp. 10 | 1.0 | 0.3 | 1.0 | 5.6 | 4.3 | 3.9 |
| E28Z.0069 | 1.3 | 1.3 | 2.5 | 4.2 | 3.2 | 3.3 |
| HMC 2439 | 0.5 | 1.1 | 2.9 | 4.9 | 4.9 | 4.5 |
| SVYG 0914 | 0.8 | 0.9 | 2.3 | 3.4 | 3.8 | 2.9 |
| SVYG 9956 | 0.5 | 0.4 | 2.9 | 5.2 | 5.2 | 4.4 |
| USAS 17150 | 0.4 | 0.3 | 0.4 | 3.6 | 3.9 | 4.3 |
| XSQ 4508 | 0.7 | 0.7 | 3.4 | 5.3 | 4.1 | 3.8 |
| Average | 1.1 | 1.4 | 2.9 | 4.3 | 4.0 | 3.7 |
| LSD (0.05) | 1.8 | 2.5 | 2.7 | 2.3 | 2.4 | 2.6 |
Number of fruit per plant per harvest period²
Cultigen |
Total |
||
Harvests 1 – 4 |
Harvests 5 – 8 |
Harvests 9 – 12 |
|
| Cardea | 5.1 | 4.8 | 7.4 |
| Cash Machine | 6.4 | 8.6 | 9.1 |
| Green Machine | 5.6 | 7.2 | 8.6 |
| Leopard | 5.0 | 4.6 | 6.1 |
| Respect | 5.2 | 4.6 | 10.6 |
| Spineless King | 4.0 | 3.8 | 5.3 |
| Spineless Supreme | 3.3 | 5.1 | 5.8 |
| Tribute | 5.5 | 6.3 | 6.4 |
| 23-147 | 4.8 | 6.4 | 7.4 |
| 1023-401 | 4.8 | 4.5 | 5.2 |
| 697 | 5.7 | 4.3 | 6.3 |
| A10129 | 6.9 | 5.8 | 6.2 |
| A10131 | 4.7 | 5.3 | 5.7 |
| A10133 | 5.2 | 4.8 | 6.4 |
| A10138 | 6.0 | 6.3 | 7.8 |
| A10139 | 6.3 | 5.7 | 6.2 |
| A10141 | 5.9 | 5.6 | 5.5 |
| Bejo Exp. 10 | 6.6 | 4.6 | 4.8 |
| E28Z.0069 | 5.5 | 4.5 | 5.8 |
| HMC 2439 | 5.4 | 6.0 | 7.4 |
| SVYG 0914 | 4.2 | 4.7 | 5.2 |
| SVYG 9956 | 5.6 | 5.5 | 7.3 |
| USAS 17150 | 4.0 | 4.2 | 4.7 |
| XSQ 4508 | 5.9 | 4.7 | 7.2 |
| Average | 5.3 | 5.3 | 6.6 |
| LSD (0.05) | 2.0 | 2.0 | 2.7 |
¹Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, 22 and 24 July; Harvests 9-12 occurred 27, 29 and 31 July; 3 August 2020.
²Average number of fruit harvested from each plant at each harvest period (i.e.:1-4; 5-8; 9-12).
³Culls consisted primarily of misshaped fruit.
Table 6 . Zucchini squash cultigen study. Cumulative fruit weight and percent per plant among all harvests¹. Clayton, NC, 2020.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
Culls² |
Total |
% Fruit Grade #1 |
% Fruit Grade #2 |
% Culls |
| Cardea | 4.9 | 0.8 | 0.8 | 6.5 | 76 | 12 | 12 |
| Cash Machine | 4.8 | 1.3 | 1.4 | 7.4 | 64 | 17 | 18 |
| Green Machine | 3.4 | 1.7 | 1.2 | 6.2 | 54 | 27 | 19 |
| Leopard | 4.3 | 0.9 | 0.4 | 5.6 | 77 | 16 | 7 |
| Respect | 2.1 | 0.8 | 1.4 | 4.3 | 48 | 19 | 33 |
| Spineless King | 3.5 | 0.9 | 0.4 | 4.8 | 72 | 18 | 9 |
| Spineless Supreme | 2.6 | 0.7 | 0.7 | 3.9 | 65 | 17 | 18 |
| Tribute | 3.6 | 1.2 | 1.4 | 6.1 | 59 | 19 | 22 |
| 23-147 | 1.7 | 1.0 | 1.5 | 4.3 | 40 | 24 | 36 |
| 23-401 | 5.7 | 0.6 | 0.3 | 6.6 | 86 | 9 | 5 |
| 697 | 3.9 | 0.4 | 0.6 | 4.9 | 79 | 8 | 12 |
| A10129 | 3.2 | 1.0 | 1.1 | 5.3 | 60 | 19 | 21 |
| A10131 | 2.4 | 0.7 | 1.0 | 4.1 | 59 | 17 | 24 |
| A10133 | 4.1 | 1.1 | 0.8 | 6.0 | 68 | 18 | 14 |
| A10138 | 3.2 | 1.2 | 0.9 | 5.3 | 61 | 22 | 17 |
| A10139 | 3.4 | 0.9 | 1.1 | 5.4 | 62 | 16 | 21 |
| A10141 | 2.8 | 0.9 | 1.1 | 4.9 | 58 | 19 | 23 |
| Bejo Experimental 10 | 4.5 | 0.9 | 0.4 | 5.7 | 78 | 15 | 6 |
| E28Z.00697 | 4.0 | 0.4 | 0.5 | 4.9 | 82 | 8 | 10 |
| HMC 24939 | 5.2 | 1.1 | 0.8 | 7.2 | 73 | 16 | 12 |
| SVYG0914 | 3.7 | 0.5 | 0.6 | 4.8 | 76 | 11 | 12 |
| SVYG9956 | 5.4 | 1.0 | 0.6 | 7.0 | 77 | 15 | 8 |
| USAS 17150 | 5.7 | 0.5 | 0.3 | 6.5 | 88 | 8 | 4 |
| XSQ4508 | 3.7 | 1.0 | 0.9 | 5.6 | 66 | 19 | 16 |
| Average | 3.8 | 0.9 | 0.8 | 5.6 | 68 | 16 | 16 |
| LSD (0.05) | 2.8 | 0.6 | 0.8 | 2.6 | – | – | – |
¹Total of 12 harvests.
²Culls consisted of primarily misshaped fruit.
Table 7. Zucchini squash cultigen study yields, cumulative fruit number per plant and percent per grade among all harvests¹.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
Culls² |
Marketable |
Total |
% Fruit Grade #1 |
% Fruit Grade #2 |
% Culls |
| Cardea | 11 | 2 | 5 | 13 | 17 | 61 | 13 | 27 |
| Cash Machine | 12 | 4 | 9 | 15 | 24 | 48 | 16 | 36 |
| Green Machine | 9 | 6 | 7 | 15 | 21 | 42 | 26 | 31 |
| Leopard | 10 | 3 | 3 | 13 | 16 | 61 | 22 | 17 |
| Respect | 6 | 3 | 11 | 10 | 20 | 31 | 17 | 53 |
| Spineless King | 8 | 2 | 3 | 10 | 13 | 58 | 18 | 25 |
| Spineless Supreme | 7 | 2 | 5 | 9 | 14 | 49 | 16 | 35 |
| Tribute | 8 | 3 | 7 | 11 | 18 | 44 | 19 | 37 |
| 23-147 | 5 | 3 | 11 | 7 | 19 | 24 | 15 | 60 |
| 23-401 | 11 | 2 | 2 | 13 | 14 | 76 | 11 | 13 |
| 697 | 9 | 1 | 6 | 10 | 16 | 54 | 7 | 39 |
| A10129 | 8 | 4 | 7 | 12 | 19 | 44 | 19 | 37 |
| A10131 | 6 | 3 | 7 | 9 | 16 | 40 | 17 | 43 |
| A10133 | 9 | 3 | 4 | 13 | 16 | 58 | 20 | 22 |
| A10138 | 10 | 5 | 5 | 15 | 20 | 50 | 24 | 25 |
| A10139 | 9 | 3 | 6 | 12 | 18 | 49 | 16 | 36 |
| A10141 | 7 | 4 | 6 | 11 | 17 | 43 | 21 | 36 |
| Bejo Experimental 10 | 11 | 2 | 2 | 14 | 16 | 71 | 15 | 14 |
| E28Z.00697 | 10 | 1 | 5 | 11 | 16 | 61 | 8 | 31 |
| HMC 24939 | 12 | 3 | 5 | 14 | 19 | 62 | 15 | 23 |
| SVYG0914 | 8 | 2 | 4 | 10 | 14 | 60 | 12 | 28 |
| SVYG9956 | 12 | 3 | 4 | 15 | 18 | 66 | 14 | 20 |
| USAS 17150 | 11 | 1 | 1 | 12 | 13 | 82 | 8 | 9 |
| XSQ4508 | 9 | 4 | 5 | 13 | 18 | 51 | 22 | 27 |
| Average | 9 | 3 | 5 | 12 | 17 | 54 | 16 | 30 |
| LSD (0.05) | 6 | 2 | 5 | 6 | 4 | 31 | 10 | 29 |
¹Total of 12 harvests.
²Culls consisted of primarily misshaped fruit.
Table 8. Zucchini squash cultigen study. Cumulative fruit number per acre and percentages, among all harvests¹. Clayton, NC, 2020.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
Culls² |
Total |
% Fruit Grade #1 |
% Fruit Grade #2 |
% Culls |
| Cardea | 45956 | 9583 | 20147 | 75686 | 61 | 13 | 27 |
| Cash Machine | 50094 | 17315 | 37353 | 104762 | 48 | 16 | 36 |
| Green Machine | 39095 | 24285 | 29730 | 93110 | 42 | 26 | 31 |
| Leopard | 39095 | 14375 | 10999 | 64469 | 61 | 22 | 17 |
| Respect | 26572 | 14810 | 45302 | 86684 | 31 | 17 | 53 |
| Spineless King | 32888 | 10128 | 13613 | 56628 | 58 | 18 | 25 |
| Spineless Supreme | 29621 | 10237 | 22107 | 61964 | 49 | 16 | 35 |
| Tribute | 33541 | 14375 | 29076 | 76992 | 44 | 19 | 37 |
| 23-147 | 19929 | 12524 | 48787 | 81239 | 24 | 15 | 60 |
| 23-401 | 47807 | 6643 | 8276 | 62726 | 76 | 11 | 13 |
| 697 | 38224 | 5080 | 27552 | 70856 | 54 | 7 | 39 |
| A10129 | 35719 | 15682 | 30928 | 82328 | 44 | 19 | 37 |
| A10131 | 27987 | 11652 | 28967 | 68607 | 40 | 17 | 43 |
| A10133 | 41164 | 14266 | 15899 | 71330 | 58 | 20 | 22 |
| A10138 | 43887 | 21562 | 21671 | 87120 | 50 | 24 | 25 |
| A10139 | 38660 | 12632 | 27552 | 78844 | 49 | 16 | 36 |
| A10141 | 29948 | 15246 | 27116 | 72310 | 43 | 21 | 36 |
| Bejo Experimental 10 | 49223 | 10781 | 9583 | 69587 | 71 | 15 | 14 |
| E28Z.00697 | 41382 | 5336 | 21889 | 68607 | 61 | 8 | 31 |
| HMC 24939 | 47916 | 11326 | 18295 | 77537 | 62 | 15 | 23 |
| SVYG0914 | 36155 | 6970 | 16771 | 59895 | 60 | 12 | 28 |
| SVYG9956 | 52599 | 11543 | 16335 | 80477 | 66 | 14 | 20 |
| USAS 17150 | 46391 | 4792 | 5118 | 56301 | 82 | 8 | 9 |
| XSQ4508 | 39748 | 17315 | 20800 | 77864 | 51 | 22 | 27 |
| Average | 38900 | 12436 | 23078 | 74413 | 54 | 16 | 30 |
| LSD (0.05) | 24506 | 8493 | 23037 | 19323 | 31 | 10 | 29 |
¹Total of 12 harvests.
²Culls consisted of primarily misshaped fruit.
Table 9. Zucchini squash cultigen study yields¹. Number of fruit per acre by grade per indicated harvests for replicated treatments. Clayton, NC, 2020.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
||||
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
|
| Cardea | 17969 | 14593 | 13395 | 1416 | 17533 | 5227 |
| Cash Machine | 19166 | 18731 | 12197 | 3920 | 26027 | 6098 |
| Green Machine | 13939 | 15355 | 9801 | 6861 | 22651 | 10128 |
| Leopard | 13613 | 11761 | 13721 | 5554 | 16226 | 4356 |
| Respect | 13395 | 6425 | 6752 | 5554 | 10237 | 5445 |
| Spineless King | 12306 | 11870 | 8712 | 2614 | 14702 | 4683 |
| Spineless Supreme | 10019 | 10672 | 8930 | 3049 | 14048 | 3811 |
| Tribute | 10237 | 12850 | 10454 | 4683 | 17642 | 4900 |
| 23-147 | 8494 | 8168 | 3267 | 3703 | 13286 | 3703 |
| 1023-401 | 16226 | 17097 | 14484 | 2505 | 18404 | 2831 |
| 697 | 15573 | 9910 | 12741 | 1634 | 11108 | 2249 |
| A10129 | 13177 | 13068 | 9474 | 5990 | 17860 | 4900 |
| A10131 | 9474 | 9257 | 9256 | 4247 | 13395 | 3267 |
| A10133 | 14593 | 14157 | 12415 | 5554 | 17860 | 5009 |
| A10138 | 13613 | 16880 | 13395 | 7841 | 22760 | 7841 |
| A10139 | 13721 | 12088 | 12850 | 5227 | 15573 | 3920 |
| A10141 | 10237 | 9039 | 10672 | 5990 | 14484 | 3811 |
| Bejo Exp. 10 | 20800 | 16771 | 11652 | 3594 | 18731 | 5227 |
| E28Z.0069 | 16988 | 12524 | 11870 | 1307 | 14048 | 2505 |
| HMC 2439 | 18404 | 17424 | 12088 | 1851 | 20255 | 6643 |
| SVYG 0914 | 12632 | 13721 | 9801 | 1742 | 16335 | 2614 |
| SVYG 9956 | 21127 | 18731 | 12741 | 1307 | 22542 | 6425 |
| USAS 17150 | 14484 | 15573 | 16335 | 1089 | 16988 | 2287 |
| XSQ 4508 | 17097 | 12959 | 9692 | 5881 | 17642 | 6752 |
| Average | 14470 | 13318 | 11112 | 3880 | 17097 | 4776 |
| LSD (0.05) | 10516 | 10217 | 9488 | 5460 | 3654 | 4463 |
Cultigen |
Culls² |
Total |
||||
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
|
| Cardea | 2940 | 3485 | 13721 | 22325 | 21018 | 32343 |
| Cash Machine | 4574 | 11543 | 21236 | 27661 | 37571 | 39531 |
| Green Machine | 3703 | 8712 | 17315 | 24503 | 31363 | 37244 |
| Leopard | 1525 | 2614 | 6861 | 20691 | 18840 | 24938 |
| Respect | 2940 | 9474 | 32888 | 21889 | 19711 | 45085 |
| Spineless King | 2287 | 1851 | 9474 | 17206 | 16553 | 22869 |
| Spineless Supreme | 1416 | 8168 | 12524 | 14484 | 22216 | 25265 |
| Tribute | 8276 | 8930 | 11870 | 23196 | 26572 | 27225 |
| 23-147 | 8821 | 14702 | 25265 | 21018 | 27987 | 32234 |
| 1023-401 | 2069 | 980 | 5227 | 20800 | 19384 | 22542 |
| 697 | 7514 | 7732 | 12306 | 24720 | 18840 | 27296 |
| A10129 | 10890 | 7405 | 12632 | 30056 | 25265 | 27007 |
| A10131 | 6752 | 9801 | 12415 | 20473 | 23196 | 24938 |
| A10133 | 2505 | 3158 | 10237 | 22651 | 21018 | 27661 |
| A10138 | 4574 | 4465 | 12632 | 26027 | 27225 | 33868 |
| A10139 | 8276 | 9039 | 10237 | 27225 | 24611 | 27007 |
| A10141 | 8821 | 9257 | 9039 | 25047 | 23740 | 23522 |
| Bejo Exp. 10 | 4138 | 1307 | 4138 | 28532 | 20038 | 21018 |
| E28Z.0069 | 5445 | 5663 | 10781 | 23740 | 19711 | 25156 |
| HMC 2439 | 2069 | 4574 | 11652 | 22325 | 24829 | 30383 |
| SVYG 0914 | 3376 | 3594 | 9801 | 17751 | 19929 | 22216 |
| SVYG 9956 | 2069 | 1525 | 12741 | 24503 | 24067 | 31908 |
| USAS 17150 | 1851 | 1416 | 1851 | 17424 | 18404 | 20473 |
| XSQ 4508 | 2940 | 2940 | 14919 | 25918 | 20582 | 31363 |
| Average | 4574 | 5931 | 12573 | 22923 | 23028 | 28462 |
| LSD (0.05) | 7927 | 10759 | 11501 | 8922 | 8991 | 11365 |
¹Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, 22 and 24 July; Harvests 9-12 occurred 27, 29 and 31 July; 3 August 2020.
²Culls consisted of primarily misshaped fruit.
Table 10. Zucchini squash cultigen study¹. Percent fruit number per acre per indicated harvests for replicated treatments. Clayton, NC, 2020.
Cultigen |
Fruit Grade #1 |
Fruit Grade #2 |
||||
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
Harvests
|
|
| Cardea | 87 | 83 | 58 | 6 | 13 | 16 |
| Cash Machine | 83 | 71 | 46 | 14 | 19 | 15 |
| Green Machine | 84 | 73 | 55 | 28 | 23 | 28 |
| Leopard | 94 | 86 | 74 | 26 | 24 | 18 |
| Respect | 86 | 52 | 26 | 25 | 19 | 12 |
| Spineless King | 86 | 88 | 58 | 15 | 17 | 20 |
| Spineless Supreme | 89 | 66 | 52 | 22 | 15 | 14 |
| Tribute | 66 | 68 | 58 | 21 | 18 | 18 |
| 23-147 | 58 | 47 | 22 | 18 | 18 | 12 |
| 1023-401 | 90 | 95 | 77 | 12 | 7 | 13 |
| 697 | 71 | 61 | 55 | 6 | 7 | 8 |
| A10129 | 65 | 71 | 54 | 20 | 19 | 18 |
| A10131 | 66 | 60 | 49 | 21 | 18 | 13 |
| A10133 | 89 | 85 | 63 | 24 | 18 | 19 |
| A10138 | 82 | 83 | 63 | 30 | 21 | 23 |
| A10139 | 68 | 63 | 63 | 19 | 14 | 15 |
| A10141 | 66 | 63 | 64 | 23 | 22 | 17 |
| Bejo Exp. 10 | 86 | 94 | 81 | 13 | 10 | 25 |
| E28Z.0069 | 78 | 73 | 57 | 5 | 9 | 10 |
| HMC 2439 | 91 | 82 | 63 | 9 | 11 | 22 |
| SVYG 0914 | 82 | 81 | 58 | 10 | 14 | 12 |
| SVYG 9956 | 92 | 93 | 60 | 5 | 16 | 20 |
| USAS 17150 | 89 | 92 | 91 | 6 | 8 | 11 |
| XSQ 4508 | 89 | 85 | 52 | 23 | 23 | 22 |
| Average | 81 | 76 | 58 | 17 | 16 | 76 |
| LSD (0.05) | 31 | 39 | 36 | 22 | 13 | 39 |
Cultigen |
Culls² |
||
Harvests 1 – 4 |
Harvests 5 – 8 |
Harvests 9 -12 |
|
| Cardea | 13 | 17 | 42 |
| Cash Machine | 17 | 29 | 54 |
| Green Machine | 16 | 27 | 45 |
| Leopard | 6 | 14 | 26 |
| Respect | 14 | 48 | 74 |
| Spineless King | 14 | 12 | 42 |
| Spineless Supreme | 11 | 34 | 48 |
| Tribute | 34 | 32 | 42 |
| 23-147 | 42 | 53 | 78 |
| 1023-401 | 10 | 5 | 23 |
| 697 | 29 | 39 | 45 |
| A10129 | 35 | 29 | 46 |
| A10131 | 34 | 40 | 51 |
| A10133 | 11 | 15 | 37 |
| A10138 | 18 | 17 | 37 |
| A10139 | 32 | 37 | 37 |
| A10141 | 34 | 37 | 36 |
| Bejo Exp. 10 | 14 | 6 | 19 |
| E28Z.0069 | 22 | 27 | 43 |
| HMC 2439 | 9 | 18 | 37 |
| SVYG 0914 | 18 | 19 | 42 |
| SVYG 9956 | 8 | 7 | 40 |
| USAS 17150 | 11 | 8 | 9 |
| XSQ 4508 | 11 | 15 | 48 |
| Average | 19 | 24 | 42 |
| LSD (0.05) | 31 | 39 | 36 |
Fruit Size (cm)
¹ Total of 12 harvests. Planting was 2 June 2020. Harvests 1-4 occurred on 8, 10 , 13 and 15 July; Harvests 5-8 occurred on 17, 20, 22 and 24 July; Harvests 9-12 occurred 27, 29 and 31 July; 3 August 2020.
² Culls consisted of primarily misshaped fruit.
Table 11. Zucchini Squash cultigen study – Percent plant stand count and average fruit length and width among replicated treatments. Clayton, NC, 2020.
Cultigen |
% Stand¹ |
Cumulative Fruit Size |
|
Average Length (cm) |
Average Width(cm) |
||
| Cardea | 100 | 16.8 | 4.4 |
| Cash Machine | 100 | 16.8 | 4.3 |
| Green Machine | 100 | 15.3 | 3.9 |
| Leopard | 95 | 16.0 | 4.4 |
| Respect | 98 | 15.6 | 4.1 |
| Spineless King | 100 | 16.8 | 4.1 |
| Spineless Supreme | 100 | 15.6 | 4.0 |
| Tribute | 98 | 17.4 | 4.3 |
| 23-147 | 100 | 14.5 | 3.7 |
| 1023-401 | 100 | 17.1 | 4.7 |
| 697 | 100 | 16.2 | 4.0 |
| A10129 | 100 | 16.1 | 4.1 |
| A10131 | 100 | 17.3 | 4.3 |
| A10133 | 100 | 16.6 | 4.0 |
| A10138 | 100 | 17.8 | 3.9 |
| A10139 | 100 | 17.0 | 4.0 |
| A10141 | 98 | 17.0 | 4.4 |
| Bejo Exp. 10 | 100 | 17.0 | 4.7 |
| E28Z.0069 | 100 | 17.1 | 4.5 |
| HMC 2439 | 95 | 14.9 | 4.1 |
| SVYG 0914 | 100 | 16.1 | 4.4 |
| SVYG 9956 | 98 | 15.5 | 4.2 |
| USAS 17150 | 100 | 17.2 | 5.0 |
| XSQ 4508 | 100 | 16.9 | 4.6 |
| Average | 99 | 16 | 4 |
| LSD (0.05) | 4 | 1.2 | 0.3 |
Fruit Size (cm)
Cultigen |
Harvest 3 |
Harvest 6 |
||
Average Length |
Average Width |
Average Length |
Average Width |
|
| Cardea | 17.4 | 4.5 | 17.0 | 4.6 |
| Cash Machine | 16.9 | 4.3 | 18.0 | 4.8 |
| Green Machine | 17.0 | 4.3 | 15.6 | 4.2 |
| Leopard | 15.7 | 4.4 | 16.9 | 4.8 |
| Respect | 16.3 | 4.4 | 15.4 | 4.6 |
| Spineless King | 16.8 | 4.0 | 17.7 | 4.7 |
| Spineless Supreme | 16.1 | 4.0 | 16.8 | 4.7 |
| Tribute | 17.9 | 4.5 | 16.6 | 4.4 |
| 23-147 | 15.2 | 3.8 | 15.5 | 4.2 |
| 1023-401 | 16.6 | 4.5 | 17.5 | 5.1 |
| 697 | 15.8 | 3.8 | 16.6 | 4.5 |
| A10129 | 15.9 | 3.9 | 15.7 | 4.5 |
| A10131 | 17.4 | 4.1 | 17.6 | 4.4 |
| A10133 | 16.8 | 4.3 | 16.4 | 4.3 |
| A10138 | 18.2 | 3.9 | 17.0 | 4.2 |
| A10139 | 16.6 | 4.0 | 16.4 | 4.3 |
| A10141 | 17.3 | 4.5 | 16.8 | 4.9 |
| Bejo Exp. 10 | 17.1 | 4.6 | 16.4 | 4.9 |
| E28Z.0069 | 16.5 | 4.2 | 17.3 | 4.9 |
| HMC 2439 | 15.8 | 4.1 | 14.5 | 4.2 |
| SVYG 0914 | 16.2 | 4.2 | 16.8 | 5.0 |
| SVYG 9956 | 16.4 | 4.3 | 14.7 | 4.3 |
| USAS 17150 | 17.8 | 4.9 | 15.3 | 4.6 |
| XSQ 4508 | 16.7 | 4.6 | 17.0 | 4.9 |
| Average | 17 | 4 | 16 | 5 |
| LSD (0.05) | 1.9 | 0.6 | 1.7 | 0.6 |
Fruit Size (cm)
Cultigen |
Harvest 9 |
Harvest 12 |
||
Average Length |
Average Width |
Average Length |
Average Width |
|
| Cardea | 16.1 | 4.1 | 16.8 | 4.2 |
| Cash Machine | 16.3 | 4.2 | 16.1 | 3.9 |
| Green Machine | 14.7 | 3.8 | 13.9 | 3.3 |
| Leopard | 16.5 | 4.6 | 14.8 | 3.9 |
| Respect | 15.2 | 3.8 | 15.3 | 3.6 |
| Spineless King | 15.8 | 4.0 | 16.9 | 3.8 |
| Spineless Supreme | 14.4 | 3.7 | 15.0 | 3.4 |
| Tribute | 16.3 | 4.1 | 18.9 | 4.4 |
| 23-147 | 14.0 | 3.6 | 13.1 | 3.1 |
| 1023-401 | 16.3 | 4.5 | 18.0 | 4.6 |
| 697 | 15.6 | 3.8 | 16.9 | 3.8 |
| A10129 | 15.3 | 3.8 | 17.6 | 4.1 |
| A10131 | 15.4 | 4.1 | 18.7 | 4.5 |
| A10133 | 16.8 | 3.9 | 16.3 | 3.6 |
| A10138 | 18.1 | 3.9 | 17.8 | 3.6 |
| A10139 | 16.4 | 3.7 | 18.6 | 4.1 |
| A10141 | 17.1 | 4.4 | 16.7 | 4.0 |
| Bejo Exp. 10 | 16.2 | 4.4 | 18.5 | 4.9 |
| E28Z.0069 | 17.0 | 4.5 | 17.6 | 4.4 |
| HMC 2439 | 14.7 | 4.0 | 14.4 | 3.9 |
| SVYG 0914 | 15.0 | 4.1 | 16.5 | 4.5 |
| SVYG 9956 | 14.4 | 3.8 | 17.1 | 4.5 |
| USAS 17150 | 17.4 | 5.0 | 18.2 | 5.4 |
| XSQ 4508 | 16.0 | 4.3 | 17.8 | 4.6 |
| Average | 16 | 4 | 17 | 4 |
| LSD (0.05) | 1.7 | 0.4 | 2.5 | 0.7 |
¹Final plant stand count was taken on 19 June 2020.
Table 12. Zucchini Squash cultigen study – Plant growth quality data. Clayton, NC, 2020.
Cultigen |
Plant Architecture1 |
Plant Vigor2 |
Fruit Color3 |
Spine4 |
Powdery Mildew5 |
| Cardea | 5.0 | 8.8 | 3.9 | 3.2 | 6.0 |
| Cash Machine | 7.7 | 6.8 | 4.0 | 5.5 | 8.0 |
| Green Machine | 4.8 | 8.5 | 3.8 | 7.8 | 6.5 |
| Leopard | 2.8 | 7.0 | 3.8 | 9.0 | 6.8 |
| Respect | 3.5 | 6.8 | 4.5 | 4.0 | 4.8 |
| Spineless King | 7.3 | 8.5 | 3.5 | 1.0 | 7.5 |
| Spineless Supreme | 4.0 | 8.5 | 3.6 | 1.5 | 5.5 |
| Tribute | 2.8 | 7.3 | 3.9 | 3.5 | 5.1 |
| 23-147 | 5.8 | 8.5 | 4.1 | 2.3 | 8.0 |
| 23-401 | 3.3 | 7.8 | 4.2 | 3.3 | 3.9 |
| 697 | 2.2 | 7.3 | 4.3 | 2.5 | 5.4 |
| A10129 | 3.0 | 7.0 | 4.1 | 3.5 | 3.4 |
| A10131 | 2.0 | 6.8 | 4.1 | 3.3 | 2.9 |
| A10133 | 2.2 | 7.8 | 3.8 | 4.5 | 7.8 |
| A10138 | 2.7 | 7.3 | 4.0 | 6.0 | 4.1 |
| A10139 | 3.0 | 7.3 | 4.1 | 3.0 | 3.3 |
| A10141 | 3.3 | 7.5 | 4.4 | 4.0 | 3.3 |
| Bejo Experimental 10 | 3.0 | 7.8 | 4.1 | 3.7 | 3.1 |
| E28Z.00697 | 2.2 | 7.0 | 4.1 | 3.2 | 4.9 |
| HMC 24939 | 2.7 | 6.0 | 3.8 | 5.8 | 5.6 |
| SVYG9956 | 4.8 | 8.0 | 3.9 | 4.7 | 5.9 |
| SVYG0914 | 5.0 | 8.3 | 3.9 | 2.5 | 5.3 |
| USAS 17150 | 4.0 | 8.0 | 3.8 | 1.5 | 7.5 |
| XSQ4508 | 1.8 | 7.8 | 4.0 | 6.3 | 5.5 |
| Average | 3.7 | 7.6 | 4.0 | 4.0 | 5.4 |
| LSD (0.05) | 1.2 | 1.4 | 0.2 | 1.0 | 1.3 |
1 Plant architecture ratings were taken on 15 July 2020 and are on a scale of 1-10; 1 = open, 10 = dense.
2 Vigor ratings for plant foliage were taken on 15 July 2020 and are on a scale of 1-10; 1 = small plants, 10 = robust, vigorous plants.
3 Color ratings for fruit were taken on 15 and 27 July and are on a scale of 1-5; 1 = pale green , 5 = dark green.
4 Spine ratings for plant stem and plant foliage were taken on 3 August 2020 and are on a scale of 1-10; 1 = no spines, 10 = coarse and many spines.
5 Powdery Mildew ratings for disease severity were taken on 14 August 2020 and are on a scale of 1-10; 1 = no damage due to PM, 10 = very high incidence on both vine and fruit.