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NC State Extension

2017 Yellow Summer and Zucchini Squash Cultigen Evaluations

Horticulture Series 223

Jonathan R. Schultheis & Keith D. Starke, Department of Horticultural Science

General Cultural Practices

The squash study was established on black plastic mulch. Pesticides used on all plots were chemicals labelled for that crop, 2017 North Carolina Agricultural Chemicals Manual. View a pdf version of the 2017 squash cultigen evaluations.

Acknowledgements

2017 squash booklet

View the pdf version of the 2017 squash cultigen evaluations

We gratefully acknowledge the assistance of Cathy Herring, (Superintendent), and Brandon Poole, (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 cultigen evaluation study. We want to acknowledge the following summer employees for their assistance with the study: Stephen Bajorek, Shannon Dexter, Elizabeth Indermaur, Katherine Phillips, as well as, graduate students; Fernando Montero De Espinosa and Marlee Trandel. We would also like to thank Joy Smith for conducting the statistical analysis on the data that was collected in this study. The cooperation and support of Abbot & Cobb, Clifton, Bejo, Enza Zaden, HM Clause, Rijk Zwaan, Seminis/Monsanto, and Syngenta are also appreciated. We also want to acknowledge, support for this study was provided by the US Department of Agriculture, National Institute of Food and Agriculture, for the CucCAP Specialty Crop Research Initiative grant under award number 2015-51181-24285.

Disclaimer

This publication presents data from the cultigen evaluation study conducted during 2017. 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.

Introduction

In 2017, summer squash production totaled 2,400 acres in North Carolina. Summer squash remains an important crop to North Carolina producers as the state ranked 7th among those states that produced the crop nationwide in 2013. Summer squash ranks among the top 10 vegetables grown in North Carolina. Squash represents significant economic importance to North Carolina growers with a crop value of $10.1 million in 2017. North Carolina growers have maintained their competitiveness through producing squash varieties that are highly desired by the consumer. In an effort to remain competitive in the marketplace and maximize profitability growers seek to grow squash varieties 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 medium green fruit, however, some markets have seen increased demand for cultigens that produce a darker green fruit. Summer squash plantings in North Carolina typically experience higher incidence of disease and insect pressure as they are harvested in the fall when environmental factors favor increased presence of these plant pests. In 2017 the field study was planted on 14 August and we began harvesting on 20 September. The squash were rated for marketable and non-marketable 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 calculated to conduct the most complete evaluation of each cultigen 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.

Materials and Methods

Seeds were sown on 14 August 2017. Hills with seed skips were replanted 9 days after planting to maximize plant stand counts in each plot. Final stand counts were taken on 20 September (approx. 5 weeks after initial planting). This study was planted into existing plastic mulch from a preceding squash study. The herbicide Gramoxone was applied to row middles at 4.5 pt/acre and the herbicide Curbit was applied to spray alleys at 4 pt/ac on 9 September. The insecticides Asana XL, FanFare, Perm-Up 2EC were rotated and applied as a preventative measure beginning 30 August and on the following dates: 13, 20, 27 and 4 September. The following fungicide products were used: Bravo, Presidio, Prestine, Prevacur Flex, Ranman, and Viviando; and applied on the following dates: 30 August; 13, 20, and 27 September; and 4 October. Fertilizer was applied through drip irrigation on the following dates: 9 and 30 August; 13, 20, and 27 September; and 4 October. Harvests were conducted three times per week with a total of 12 harvests for the study. The first harvest was 20 September and the final harvest (#12) was completed on 16 October. Most fruit were harvested when the blossom was detached from the fruit, and then categorized as marketable or nonmarketable. Fruit that were small or undersized, 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. Other than yield, other quality measurements taken were: percent plant stand and average fruit length and width. Overall, plant stands were excellent for zucchini squash at 97% on average and somewhat lower for yellow squash at 85%. However, the entire study was affected by severe virus pressure and therefore underperformed with regards to overall fruit yield and quality.

The highest yields of US #1 squash were obtained during the first four harvests (74%) followed by (70%) in harvests 5 through 8 and (57%) in harvests 9 through 12 (Table 3).

Significant disease pressure moved into the study shortly after establishment and disease severity increased throughout the growing season. This greatly reduced marketable yields in harvests 5 through 8 and harvests 9 through 12 (Table 3). Significant disease pressure throughout the season suppressed yields of the entire study resulting in an only 73 % marketable fruit across all entries (Table 2). Entries that performed well above the average were E28Z.00628 (95%), Everglade (95%), Ladoga (93%), SV0914 (88%) and Sanabria (85%) (Table2). The entry with the highest yielding US #1 marketable fruit was SV0474 (505 boxes per acre), the lowest was 23-580 (90 boxes per acre). The low yields were mainly due to inferior plant stand.

The percentage of US #1 marketable fruit was especially high for SV0474 (98.1%) and Everglade (96.4%) during harvests 1 through 4; E28Z.00628 (95.1%) and Everglade (91.2%) during harvests 5 through 8; and during harvests 9 through 12, E28Z.00628 (88.6%), SV0914 (79.5%) and Everglade (74.9%) (Table 3).

The number of fruit per plant for each entry during three harvest intervals are shown in Table 4. Cumulative marketable fruit weight per plant over all harvests (12) averaged 73.3% (Table 5), while cumulative marketable fruit number per plant averaged 70.4% (Table 6).

The cumulative number of fruits per acre for each cultigen across all harvest (12) and for each grade are provided in Table 7, while the number of fruits per acre for each cultigen for harvests 1 through 4 (early season), harvests 5 through 8 (mid-season) and harvests 9 through 12 (late season) are provided in Table 8, with corresponding percentages in Table 9.

Limited data outside of yields were obtained, however, percentage plant stand and average fruit length and widths were determined (Table 10). Longer fruits were generally obtained with Sanabria, Calagreen, Zucchini Elite and Ladoga.

Yellow squash cultigens in the study were affected by virus similar to the zucchini squash entries. The highest yielding yellow squash cultigens (Marketable) based on total number of boxes per acre for early-harvests (1-4) were Grandprize and Cosmos (Table 11). Grandprize and Goldprize yielded the highest number of twenty pound boxes in the mid-season harvests (5-8) (Table 11). Similar to mid-season harvests, Grandprize and Goldprize had the highest marketable yields (based on total number of 20 pound boxes per acre) in the late-season harvests (9-12) (Table 11). Grandprize and Cosmos yielded the highest cumulative number of 20 lb boxes per acre (≥150) across all harvests (Table 12). Grandprize and Cosmos had the highest percentage (> 80%) of marketable fruit in early-harvests (1-4) (Table 13). In the mid-season harvests (5-8) Grandprize and Multipik had the highest percentage (> 59%) of marketable fruit. Grandprize had the highest percentage (> 67%) of marketable fruit in the late-season harvests (9-12) ) (Table 13). Grandprize and Multipik had the highest number of yields (≥ 2.0 fruit per plant) in the early-season harvests (1-4) (Table 14). Grandprize yielded the greatest number of fruit per plant in the mid-season harvests (5-8) and late-season harvests (8-12) (Table 14). Grandprize and Multipik yielded the highest percentage of fruit weight per plant (≥ 57%) across all harvests (Table 15). Grandprize and Multipik also had the highest percentage of fruit number per plant (≥ 61%) across all harvests (Table 16). These two cultigens yielded 19,275 and 15,028 fruit per acre, respectively, across all harvests (Table 17). Cosmos and Grandprize yielded the highest number of fruit per acre (> 7,150 fruit per acre) in the early-season harvests (1-4) (Table 18). Goldprize and Grandprize both yielded more than 6,200 fruit per acre in the mid-season harvests (5-8). Grandprize yielded the highest number of fruit per acre (5,772 fruit per acre) in the late-season harvests (9-12) (Table 18). Grandprize had the highest percentage (95% and 69%, respectively) of marketable fruit in the early-season harvests (1-4) and mid-season harvests (5-8) (Table 19). In the late-season harvests (9-12) Grandprize had the highest percentage (66%) of marketable fruit (Table 19). Cosmos had the longest fruit length, on average, followed by Grandprize, Multipik and Goldprize (Table 20).

Note: Severe virus presence was observed soon after the study was established in the field.Photographs contained in this publication illustrate the adverse effects virus had on fruit yield and quality across all harvests (12).


Figure 1. Zucchini squash photographs, replicated cultivars. Clayton, NC, 2017.

Cultivar

Company

Calabonita Rijk Zwaan
Calagreen Rijk Zwaan
Everglade Syngenta
Green Machine Enza Zaden
Ladoga Bejo
Leopard HM Clause
Payload Syngenta
Sanabria Bejo
Spineless Supreme Syngenta
Tigress HM Clause
Zucchini Elite Clifton – HM Clause
23-580 Rijk Zwaan
23-585 Rijk Zwaan
E28Z.00628 Enza Zaden
SV0143 Syngenta
SV3451 Syngenta
SV0474 Seminis
SV0914 Seminis
SV6009 Seminis
SV9043 Seminis

Table 1.1 Zucchini Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Marketable2

 Harvests. 1 – 4

 Harvests. 5 – 8

 Harvests. 9 – 12

#1

#2

#1

#2

#1

#2

Calabonita 130 9 37 8 72 18
Calagreen 78 13 126 3 70 4
Everglade 170 4 139 5 152 30
Green Machine 123 0 95 13 79 4
Ladoga 139 11 113 6 100 31
Leopard 81 6 127 4 105 4
Payload 134 9 130 11 85 18
Sanabria 119 8 100 11 85 31
Spineless Supreme 99 0 79 14 90 16
Tigress 73 9 111 11 125 20
Zucchini Elite 49 1 66 8 39 6
23-580 22 0 34 2 33 0
23-585 148 6 131 0 126 5
E28Z.00628 155 16 178 3 152 5
SV0143 134 16 105 15 103 16
SV3451 87 4 91 2 94 7
SV0474 227 2 139 13 139 14
SV0914 38 5 75 9 117 26
SV6009 106 7 89 4 65 0
SV9043 103 5 109 2 115 7
Average 111 7 104 7 97 13
LSD (0.05) 63 15 56 12 56 19

¹Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September; Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests 9-12 occurred on 9, 11, 13, 9, 11, 13 and 16 October 2017.
²Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash than U.S. No.2 which are permitted to be more mature and allows greater surface area to be affected by defects).

Table 1.2. Zucchini Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Culls3

Virus4

Harvest

1 – 4

Harvest

5 – 8

Harvest

9 – 12

Harvest

1 – 4

Harvest

5 – 8

Harvest

9 – 12

Calabonita 9 13 15 40 33 107
Calagreen 17 5 3 11 32 42
Everglade 3 6 11 0 1 3
Green Machine 20 3 4 8 57 100
Ladoga 2 0 10 1 9 6
Leopard 26 5 10 10 13 41
Payload 8 7 26 2 20 27
Sanabria 2 8 7 4 14 31
Spineless Supreme 15 8 10 0 3 19
Tigress 14 8 0 84 67 96
Zucchini Elite 25 10 13 55 43 94
23-580 0 0 2 23 35 110
23-585 4 1 3 22 26 72
E28Z.00628 9 3 5 0 3 9
SV0143 7 11 14 3 39 44
SV3451 8 12 14 17 55 96
SV0474 2 5 1 0 3 37
SV0914 6 14 4 4 7 4
SV6009 3 5 7 9 62 85
SV9043 10 4 1 7 33 53
Average 9 6 8 15 28 54
LSD (0.05) 15 11 10 28 41 44

³ Culls consisted primarily of misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.

Table 1.3. Zucchini Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Total 20 pound boxes per acre

Harvest 1 – 4

Harvest 5 – 8

Harvest 9 – 12

Calabonita 188 91 212
Calagreen 120 166 120
Everglade 177 151 197
Green Machine 151 167 187
Ladoga 154 128 146
Leopard 123 149 160
Payload 154 168 156
Sanabria 133 132 155
Spineless Supreme 113 103 135
Tigress 180 197 241
Zucchini Elite 130 127 152
23-580 45 72 145
23-585 180 157 206
E28Z.00628 180 187 172
SV0143 160 171 177
SV3451 116 161 210
SV0474 230 160 191
SV0914 53 105 150
SV6009 124 161 157
SV9043 125 149 176
Average 142 145 172
LSD (0.05) 71 66 67

Table 2. Zucchini Squash cultigen trial yields, cumulative boxes, (20 lbs.), per acre, among all harvests¹. Clayton, NC, 2017.

 Cultivar

Marketable2

Culls

 Virus4

 Total

 Total

Percent

#1

#2

 Marketable

 Cull

 Virus

Calabonita 238 35 38 180 492 56 8 36
Calagreen 274 20 26 85 406 72 7 21
Everglade 462 39 21 4 525 95 4 1
Green Machine 297 17 26 164 505 63 5 32
Ladoga 352 48 12 15 428 93 3 3
Leopard 312 15 42 64 432 72 12 16
Payload 350 39 41 48 478 82 10 8
Sanabria 304 50 17 49 420 85 6 10
Spineless Supreme 268 29 33 22 352 84 10 6
Tigress 308 41 22 248 619 58 3 39
Zucchini Elite 155 15 47 192 408 43 12 45
23-580 90 2 2 168 262 34 0 66
23-585 405 11 8 119 542 75 2 23
E28Z.00628 485 25 17 12 539 95 3 2
SV0143YG 342 48 32 86 508 79 6 15
SV3451YG 272 13 33 168 486 61 8 31
SV0474YG 505 28 7 40 581 91 1 7
SV0914YG 230 40 23 15 308 88 7 5
SV6009YG 260 11 14 156 442 62 3 34
SV9043YG 328 14 15 93 450 77 3 20
Average 312 27 24 96 459 73 6 21
LSD (0.05) 136 26 21 97 172 15 6 15

¹ Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September; Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests 9-12 occurred on 9, 11, 13, and 16 October.
² Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
³ Culls consisted primarily of misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 3.1. Zucchini Squash cultigen trial yields¹. Percentage marketable fruit per indicated harvests by fruit yield for replicated treatments. Clayton, NC, 2017.

Percentage of yield based upon grade.

Cultivar

Marketable²

#1

#2

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 68 43 30 6 9 12
Calagreen 66 74 57 11 1 4
Everglade 96 91 75 2 3 15
Green Machine 82 56 43 0 10 3
Ladoga 91 87 67 8 6 20
Leopard 62 82 64 4 3 2
Payload 83 80 54 8 8 12
Sanabria 87 74 54 9 9 22
Spineless Supreme 86 76 66 0 9 11
Tigress 40 58 52 6 6 8
Zucchini Elite 38 52 28 1 8 4
23-580 39 33 26 0 2 0
23-585 81 83 59 3 0 2
E28Z.00628 88 95 89 8 2 3
SV0143 86 63 60 9 10 10
SV0474 98 88 73 1 8 7
SV0914 62 71 80 8 8 16
SV3451 75 61 47 4 1 3
SV6009 75 56 44 11 3 0
SV9043 83 76 66 4 1 4
Average 74 70 57 5 5 8
LSD (0.05) 22 23 21 11 9 11

¹ Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September; Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests 9-12
occurred on 9, 11, 13, and 16 October.
² Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash than U.S. No.2 which are permitted to be more mature and allows greater surface area to be
affected by defects).

Table 3.2. Zucchini Squash cultigen trial yields¹. Percentage cull and virus symptomatic fruit per indicated harvests by fruit yield for replicated treatments. Clayton, NC, 2017.

Cultivar

Culls3

Virus4

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 6 12 8 20 36 50
Calagreen 14 3 3 9 21 36
Everglade 2 5 8 0 1 2
Green Machine 14 2 2 5 33 53
Ladoga 1 0 8 0 7 5
Leopard 25 4 9 10 12 25
Payload 8 3 17 1 9 16
Sanabria 2 10 5 3 7 19
Spineless Supreme 14 10 9 0 5 14
Tigress 6 5 0 49 32 40
Zucchini Elite 22 7 8 39 32 60
23-580 0 0 1 61 65 74
23-585 3 0 1 13 17 38
E28Z.00628 5 2 3 0 2 6
SV0143 4 8 8 2 19 22
SV0474 1 3 0 0 2 20
SV0914 11 14 3 19 6 2
SV3451 9 11 6 12 28 43
SV6009 2 3 4 13 38 51
SV9043 9 2 1 5 21 30
Average 8 5 5 13 20 30
LSD (0.05) 13 11 8 18 24 19

³ Culls consisted primarily of misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 4.1. Zucchini Squash cultigen trial yields¹, average number of marketable³ fruit per plant, per indicated harvest period² for replicated treatments. Clayton, NC, 2017.

Cultivar

Marketable³

 1 – 4

 5 – 8

 9 – 12

 #1

 #2

 #1

 #2

 #1

 #2

Calabonita 1.7 0.6 0.8 0.1 0.2 0.2
Calagreen 1.2 1.9 0.8 0.1 0.1 0.1
Everglade 2.0 2.1 1.2 0.1 0.1 0.3
Green Machine 1.8 1.4 0.9 0.0 0.2 0.1
Ladoga 1.7 1.3 1.1 0.1 0.1 0.4
Leopard 1.0 1.8 1.0 0.1 0.1 0.1
Payload 1.5 1.9 1.2 0.1 0.1 0.2
Sanabria 1.4 1.5 1.0 0.1 0.2 0.3
Spineless Supreme 1.4 1.3 1.2 0.0 0.2 0.2
Tigress 0.7 1.7 1.4 0.1 0.1 0.2
Zucchini Elite 0.6 0.9 0.6 0.0 0.1 0.1
23-580 0.3 0.3 0.4 0.0 0.0 0.0
23-585 1.3 1.6 1.4 0.1 0.0 0.1
E28Z.00628 2.3 2.6 1.9 0.2 0.1 0.1
SV0143YG 1.7 1.4 1.1 0.2 0.2 0.2
SV0474YG 2.7 1.9 1.6 0.0 0.1 0.1
SV0914YG 0.5 1.5 1.9 0.1 0.2 0.3
SV3451YG 1.4 1.3 1.0 0.1 0.0 0.1
SV6009YG 1.6 1.3 1.1 0.1 0.1 0.0
SV9043YG 1.5 1.6 1.2 0.1 0.0 0.1
Average 1.4 1.5 1.1 0.1 0.1 0.1
LSD (0.05) 0.7 0.7 0.5 0.2 0.2 0.2

¹ Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September; Harvests 5-8 occurred on 29 September, 2, 4, and 6
October; Harvests 9-12 occurred on 9, 11, 13, and 16 October.
² Average number of fruit harvested from each plant at each harvest period (i.e.: 1-5; 6-10; 11-15).
³ Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash than U.S. No.2 which are permitted to be more mature and allows greater   surface area to be affected by defects).

Table 4.2. Zucchini Squash cultigen trial yields¹, average number of culls4 and virussymptomatic fruit per plant, per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Culls4

Virus5

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 0.2 0.3 0.3 0.4 0.6 1.3
Calagreen 0.3 0.1 0.1 0.2 0.5 0.7
Everglade 0.1 0.1 0.2 0.0 0.0 0.1
Green Machine 0.3 0.1 0.1 0.1 1.0 1.4
Ladoga 0.1 0.0 0.1 0.0 0.2 0.1
Leopard 0.4 0.1 0.2 0.2 0.4 0.7
Payload 0.2 0.2 0.4 0.0 0.2 0.4
Sanabria 0.1 0.2 0.1 0.1 0.3 0.5
Spineless Supreme 0.4 0.1 0.2 0.0 0.1 0.3
Tigress 0.1 0.1 0.0 1.1 0.8 1.4
Zucchini Elite 0.5 0.1 0.1 0.7 0.6 1.3
23-580 0.0 0.0 0.0 0.4 0.5 1.2
23-585 0.1 0.0 0.1 0.4 0.4 0.7
E28Z.00628 0.2 0.1 0.1 0.0 0.1 0.2
SV0143YG 0.2 0.2 0.2 0.0 0.5 0.6
SV0474YG 0.1 0.1 0.0 0.0 0.1 0.5
SV0914YG 0.1 0.1 0.1 0.1 0.1 0.1
SV3451YG 0.1 0.2 0.2 0.3 0.5 1.3
SV6009YG 0.0 0.1 0.1 0.2 1.1 1.4
SV9043YG 0.2 0.1 0.0 0.1 0.5 0.6
Average 0.2 0.1 0.1 0.2 0.4 0.7
LSD (0.05) 0.2 0.2 0.1 0.3 0.5 0.5

4 Culls consisted primarily of misshaped fruit.
5 Fruit were discolored or rough/disfigured due to virus.

Table 4.3. Zucchini Squash cultigen trial yields¹, total number of fruit per plant, per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Total

 1 – 4

 5 – 8

 9 – 12

Calabonita 2.3 1.6 2.7
Calagreen 1.7 2.6 1.7
Everglade 2.1 2.4 1.8
Green Machine 2.2 2.6 2.5
Ladoga 1.9 1.5 1.6
Leopard 1.7 2.3 1.9
Payload 1.8 2.4 2.2
Sanabria 1.6 2.0 1.9
Spineless Supreme 1.7 1.7 1.8
Tigress 1.9 2.8 2.9
Zucchini Elite 1.8 1.7 2.1
23-580 0.7 0.8 1.6
23-585 1.8 2.0 2.2
E28Z.00628 2.7 2.8 2.3
SV0143YG 2.0 2.4 2.0
SV0474YG 2.8 2.3 2.1
SV0914YG 0.8 1.9 2.4
SV3451YG 1.9 2.0 2.6
SV6009YG 1.8 2.5 2.5
SV9043YG 1.9 2.2 2.0
Average 1.9 2.1 2.1
LSD (0.05) 0.8 0.8 0.6

Table 5. Zucchini squash cultigen trial. Cumulative fruit weight and percent per plant among all harvests¹. Clayton, NC, 2017.

Cultivar

Marketable2

Culls3

Virus4

Total

Percent

#1

#2

Marketable

Cull

Virus

Calabonita 1.1 0.2 0.2 0.8 2.3 56 8 36
Calagreen 1.3 0.1 0.1 0.4 1.9 72 7 21
Everglade 2.2 0.2 0.1 0.0 2.5 95 4 1
Green Machine 1.4 0.1 0.1 0.8 2.4 63 5 32
Ladoga 1.6 0.2 0.1 0.1 2.0 93 3 3
Leopard 1.4 0.1 0.2 0.3 2.0 72 12 16
Payload 1.6 0.2 0.2 0.2 2.2 82 10 8
Sanabria 1.4 0.2 0.1 0.2 1.9 85 6 10
Spineless Supreme 1.2 0.1 0.2 0.1 1.6 84 11 6
Tigress 1.6 0.2 0.1 1.3 3.2 58 3 39
Zucchini Elite 0.7 0.1 0.2 0.9 1.9 43 12 45
23-580 0.4 0.0 0.0 0.8 1.2 34 1 66
23-585 1.9 0.1 0.0 0.5 2.5 75 2 24
E28Z.00628 2.2 0.1 0.1 0.1 2.5 95 3 2
SV0143 1.6 0.2 0.1 0.4 2.3 79 6 15
SV0474 2.4 0.1 0.0 0.2 2.7 91 1 8
SV0914 1.5 0.2 0.1 0.1 1.9 88 8 5
SV3451 1.3 0.1 0.2 0.8 2.3 61 8 31
SV6009 1.4 0.1 0.1 0.8 2.4 62 3 34
SV9043 1.5 0.1 0.1 0.4 2.1 77 3 20
Average 1.5 0.1 0.1 0.5 2.2 73 6 21
LSD (0.05) 0.6 0.1 0.1 0.5 0.8 15 6 15

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted primarily of mishaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 6. Zucchini squash cultigen trial yields, cumulative fruit number per plant and percent per grade among all harvests1. Clayton, NC, 2017.

Cultivar

Marketable2

Culls3

Virus4

Total

Percent

 #1

 #2

 Marketable

 Cull

 Virus

Calabonita 3.1 0.5 0.8 2.3 6.6 54 12 34
Calagreen 3.9 0.2 0.5 1.4 6.0 67 9 24
Everglade 5.3 0.4 0.4 0.2 6.3 91 6 2
Green Machine 4.1 0.2 0.4 2.5 7.3 61 6 33
Ladoga 4.0 0.6 0.2 0.3 5.0 91 3 5
Leopard 3.8 0.2 0.7 1.2 5.9 64 16 20
Payload 4.6 0.4 0.7 0.6 6.4 80 12 8
Sanabria 3.8 0.5 0.3 0.8 5.4 80 7 13
Spineless Supreme 3.9 0.4 0.7 0.3 5.2 81 14 5
Tigress 3.8 0.4 0.2 3.2 7.6 55 3 42
Zuchinni Elite 2.0 0.2 0.7 2.6 5.5 41 13 46
23-580 1.0 0.0 0.0 2.1 3.1 31 1 68
23-585 4.3 0.1 0.1 1.5 6.0 73 2 25
E28Z.00628 6.8 0.4 0.4 0.3 7.8 91 5 3
SV0143YG 4.1 0.5 0.6 1.2 6.3 74 9 17
SV0474YG 6.2 0.3 0.2 0.5 7.2 90 3 7
SV0914YG 3.9 0.5 0.3 0.3 5.0 88 6 5
SV3451YG 3.7 0.2 0.5 2.1 6.5 61 9 30
SV6009YG 3.9 0.1 0.2 2.6 6.8 59 3 38
SV9043YG 4.3 0.2 0.3 1.3 6.1 75 5 20
Average 4.0 0.3 0.4 1.4 6.1 70 7 22
LSD (0.05) 1.5 0.3 0.3 1.1 1.7 15 8 13

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which   are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 7.1. Zucchini squash cultigen trial. Marketable fruit number per acre and  percentages, among all harvests¹. Clayton, NC, 2017.

Cultivar

   Marketable2

Culls3

 Virus4

 Total

Percent

 #1

 #2

Marketable

 Culls

 Virus

Calabonita 13504 1960 3267 9801 28532 54 12 34
Calagreen 16226 980 2069 5990 25265 67 9 24
Everglade 22586 1742 1634 653 26615 91 6 2
Green Machine 17642 871 1851 10781 31145 61 6 33
Ladoga 17424 2614 653 1198 21889 91 3 5
Leopard 16444 762 3158 5336 25700 64 16 20
Payload 20147 1851 3049 2723 27770 80 12 8
Sanabria 16662 2069 1307 3485 23522 80 7 13
Spineless Supreme 16880 1634 2831 1307 22651 81 14 5
Tigress 13939 1416 871 12741 28967 55 3 42
Zucchini Elite 8712 980 2940 11543 24176 41 13 46
23-580 4138 109 109 9148 13504 31 1 68
23-585 18622 545 545 6316 26027 73 2 25
E28Z.00628 29403 1634 1851 1198 34086 91 5 3
SV0143 18023 2069 2396 5118 27606 74 9 17
SV0474 26463 1089 795 2178 30525 90 3 7
SV0914 12524 1851 980 980 16335 88 6 5
SV3451 15899 762 2287 8494 27443 61 9 30
SV6009 14048 436 762 9692 24938 59 3 38
SV9043 18840 762 1416 5445 26463 75 5 20
Average 16906 1307 1739 5706 25658 70 7 22
LSD (0.05) 6217 1122 1253 4846 7548 15 8 13

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 8.1. Zucchini squash cultigen trial yields1. Number of fruit per acre by grade per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Marketable2

 #1

 #2

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 7296 2614 3594 327 653 980
Calagreen 4901 7841 3485 545 218 218
Everglade 8494 9039 5053 218 327 1198
Green Machine 7732 5990 3920 0 653 218
Ladoga 7405 5445 4574 545 545 1525
Leopard 4356 7732 4356 327 218 218
Payload 6643 8276 5227 436 545 871
Sanabria 5990 6316 4356 327 653 1089
Spineless Supreme 5881 5772 5227 0 980 653
Tigress 2723 6098 5118 436 436 545
23-580 1089 1307 1742 0 109 0
23-585 5663 7079 5881 327 0 218
E28Z.00628 9801 11326 8276 980 327 327
Zucchini Elite 2505 3703 2505 109 544 327
SV0143 7187 6207 4628 653 762 653
SV0474 11543 8276 6643 109 545 436
SV0914 1851 4683 5990 218 436 1198
SV3451 6098 5336 4465 327 109 327
SV6009 5772 4574 3703 218 218 0
SV9043 6643 6861 5336 218 109 436
Average 5979 6224 4704 316 419 572
LSD (0.05) 3105 3012 2271 676 648 779

Table 8.2. Zucchini squash cultigen trial yields¹. Number of fruit per acre by grade per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Culls3

Virus4

Total

1 – 4

5 – 8

9 – 12

1 – 4

5 – 8

9 – 12

1 – 4

5 – 8

9 – 12

Calabonita 871 1089 1307 1634 2505 5663 10128 6861 11543
Calagreen 1307 545 218 653 2178 3158 7405 10781 7079
Everglade 327 545 762 0 109 544 9039 10019 7558
Green Machine 1307 327 218 436 4247 6098 9474 11217 10454
Ladoga 218 0 436 109 653 436 8276 6643 6970
Leopard 1851 545 762 871 1634 2831 7405 10128 8168
Payload 653 653 1742 109 980 1633 7841 10454 9474
Sanabria 218 653 436 218 1089 2178 6752 8712 8059
Spineless Supreme 1525 545 762 0 218 1089 7405 7514 7732
Tigress 436 436 0 4247 3267 5227 7841 10237 10890
23-580 0 0 109 1742 2178 5227 2831 3594 7079
23-585 218 109 218 1525 1634 3158 7732 8821 9474
E28Z.00628 980 436 436 0 218 980 11761 12306 10019
Zucchini Elite 2069 436 436 3049 2723 5772 7732 7405 9039
SV0143 653 980 762 109 2287 2722 8603 10237 8766
SV0474 218 545 33 0 218 1960 11870 9583 9071
SV0914 327 436 218 327 436 218 2723 5990 7623
SV3451 544 980 762 1089 1960 5445 8059 8385 10999
SV6009 109 327 327 545 4029 5118 6643 9148 9148
SV9043 980 327 109 545 2178 2722 8385 9474 8603
Average 741 496 503 860 1737 3109 7895 8875 8887
LSD (0.05) 884 777 565 1402 2097 2215 3365 3459 2500

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6   October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are  permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.

Table 9. Zucchini squash cultigen trial1. Percent fruit number per acre per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Marketable2

#1

#2

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 71 41 29 4 9 10
Calagreen 66 71 49 7 2 3
Everglade 94 90 65 2 3 15
Green Machine 82 54 38 0 7 3
Ladoga 90 82 66 6 9 20
Leopard 56 75 53 4 2 2
Payload 82 81 56 6 6 10
Sanabria 87 71 55 6 8 15
Spineless Supreme 77 76 67 0 10 9
Tigress 35 61 47 8 4 5
Zucchini Elite 31 50 29 2 9 3
23-580 34 28 26 0 2 0
23-585 72 81 59 4 0 2
E28Z.00628 84 92 83 8 3 3
SV0143 86 62 54 7 8 8
SV0474 97 86 74 1 6 5
SV0914 57 79 81 9 7 14
SV3451 76 62 42 4 1 3
SV6009 79 51 41 8 3 0
SV9043 80 74 62 3 1 5
Average 72 68 54 4 5 7

Cultivar

Culls3

Virus4

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Calabonita 10 13 12 15 36 49
Calagreen 17 4 3 9 23 45
Everglade 3 6 12 0 1 8
Green Machine 15 3 2 4 37 58
Ladoga 3 0 7 1 9 7
Leopard 28 6 14 12 17 31
Payload 10 5 19 2 7 16
Sanabria 4 11 6 3 10 25
Spineless Supreme 23 10 10 0 5 14
Tigress 6 4 0 51 31 48
Zucchini Elite 29 6 4 38 35 64
23-580 0 0 1 66 69 72
23-585 4 2 2 21 17 36
E28Z.00628 8 3 5 0 2 10
SV0143 7 11 9 1 20 30
SV0474 2 6 0 0 2 21
SV0914 13 9 3 21 6 3
SV3451 8 14 7 12 23 48
SV6009 2 5 4 12 42 55
SV9043 12 3 1 5 22 32
Average 10 6 6 14 21 34
LSD (0.05) 14 10 9 15 21 20

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September; Harvests 5-8 occurred on 29 September,
2, 4, and 6 October; Harvests 9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature
and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.

Table 10. Zucchini Squash cultigen trial – Percent plant stand count and average fruit length and width among replicated treatments. Clayton, NC, 2017.

Cultivar

% Stand1

Fruit Size (cm)2

Avg. Length

Avg. Width

Calabonita 100 13.6 2.8
Calagreen 98 17.9 4.1
Everglade 98 15.3 3.7
Green Machine 98 16.0 3.7
Ladoga 100 17.6 4.5
Leopard 100 16.9 3.8
Payload 100 17.2 3.8
Sanabria 100 18.1 4.8
Spineless Supreme 98 17.0 3.7
Tigress 75 16.3 3.8
Zucchini Elite 100 17.7 4.1
23-580 100 16.6 4.9
23-585 100 13.9 4.4
E28Z.00628 100 16.9 3.7
SV0143YG 88 16.6 4.1
SV0474YG 98 15.0 4.0
SV0914YG 83 16.5 4.0
SV3451YG 100 17.1 4.0
SV6009YG 100 16.8 4.5
SV9043YG 100 15.3 3.6
Average 97 16.4 4.0
LSD (0.05) – – 2.2 0.8

1 Final plant stand count was taken on 20 September 2017.
2 Fruit size measurements were taken at harvests 6 and 7, October 2nd and 4th, 2017


Figure 2. Yellow squash photographs, replicated cultivars. Clayton, NC, 2017

Cultivar

Company

Cosmos Abbot & Cobb
Goldprize Clifton
Grandprize Syngenta
Multipik HM Clause

Table 11. Yellow Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated treatments.

Cultivar

Marketable2

Culls3

1 – 4

5 – 8

9 – 12

1 – 4

5 – 8

9 – 12

Cosmos 88 38 23 1 0 1
Goldprize 30 69 35 3 1 0
Grandprize 96 71 81 1 2 2
Multipik 58 48 32 4 3 1
Average 68 57 43 2 2 1
LSD (0.05) 23 40 25 6 3 4

Cultivar

Virus4

Total

1 – 4

5 – 8

9 – 12

1 – 4

5 – 8

9 – 12

Cosmos 22 64 91 111 102 115
Goldprize 35 48 48 69 118 83
Grandprize 7 27 36 103 100 119
Multipik 35 28 28 97 80 61
Average 25 42 51 95 100 95
LSD (0.05) 28 25 30 32 38 25

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6   October; Harvests 9-12 occurred on 9, 11, 13, and 16 October 2017.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted primarily of misshaped fruit. 
4 Fruit were discolored or rough/disfigured due to virus.


Table 12. Yellow Squash cultigen trial yields, cumulative boxes, (20 lbs.), per acre, among all harvests¹. Clayton, NC, 2017.

 Cultivar

Marketable2

Culls3

Virus4

 Total

Percent

 Marketable

 Culls

 Virus

Cosmos 150 2 176 328 46 0 53
Goldprize 134 3 132 270 49 1 50
Grandprize 247 4 71 322 76 1 22
Multipik 139 8 91 238 58 4 39
Average 168 4 118 290 57 2 41
LSD (0.05) 73 9 62 86 17 3 16

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus. 


Table 13. Yellow Squash cultigen trial yields¹. Percentage marketable, cull, and virus symptomatic fruit per indicated harvests by fruit yield for replicated treatments. Clayton, NC, 2017.

Cultivar

Percentage of Yield Based Upon Grade

Marketable2

Culls3

Virus4

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Cosmos 81 38 20 1 0 1 18 63 79
Goldprize 42 57 44 5 0 0 54 43 56
Grandprize 93 69 68 1 1 2 6 29 30
Multipik 61 60 47 5 6 1 35 35 52
Average 69 56 45 3 2 1 28 42 54
LSD (0.05) 21 21 31 7 6 3 20 21 31

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows  greater surface area to be affected by defects).
3 Culls consisted primarily of mishaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 14. Yellow Squash cultigen trial yields¹, average number of fruit per plant, per indicated harvests for replicated treatments. Clayton, NC,

2017.

Cultivar

Marketable2

Culls3

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Cosmos 1.8 0.9 0.4 0.0 0.0 0.0
Goldprize 0.7 1.8 0.8 0.1 0.0 0.0
Grandprize 2.3 2.0 1.8 0.1 0.1 0.1
Multipik 2.0 1.5 1.0 0.1 0.2 0.1
Average 1.7 1.6 1.0 0.1 0.1 0.0
LSD (0.05) 1.2 1.2 0.9 0.2 0.3 0.1

Cultivar

Virus4

Total

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Cosmos 0.4 1.4 1.9 2.3 2.3 2.3
Goldprize 1.1 1.6 1.1 1.9 3.4 1.9
Grandprize 0.1 0.7 0.7 2.5 2.8 2.6
Multipik 0.7 0.9 0.8 2.8 2.6 1.8
Average 0.6 1.1 1.1 2.4 2.8 2.2
LSD (0.05) 0.6 0.9 0.8 1.0 0.9 0.4

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more  mature and allows greater surface area to be affected by defects).
3 Culls consisted primarily of misshaped fruit. 
4 Fruit were discolored or rough/disfigured due to virus.


Table 15 . Yellow squash cultigen trial. Cumulative fruit weight and percent per plant among all harvests¹. Clayton, NC, 2017.

Cultivar

Weight

Percentage

Marketable2

Culls3

Virus4

Total

 Marketable

Culls

 Virus

Cosmos 0.8 0.0 0.9 1.7 46 1 53
Goldprize 0.8 0.0 0.9 1.7 49 1 50
Grandprize 1.6 0.0 0.4 2.0 76 1 22
Multipik 0.8 0.1 0.5 1.4 58 4 39
Average 1.0 0.0 0.7 1.7 57 2 41
LSD (0.05) 0.7 0.1 0.5 0.6 17 3 16

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted primarily of mishaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.
NS Data were not statistically significant.


Table 16. Yellow squash cultigen trial yields, cumulative fruit number per plant, among all harvests¹. Clayton,NC, 2017.

Cultivar

Marketable2

Culls3

Virus4

 Total

Percent

Marketable

Culls

Virus

Cosmos 3.1 0.1 3.7 6.9 46.6 0.8 52.6
Goldprize 3.3 0.2 3.8 7.2 48.6 2.3 49.1
Grandprize 6.1 0.2 1.5 7.8 75.7 1.5 22.8
Multipik 4.5 0.4 2.3 7.3 61.9 5.4 32.6
Average 4.3 0.2 2.8 7.3 58.2 2.5 39.3
LSD (0.05) 3.1 0.4 2.0 1.9 20.7 4.3 20.5

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 17. Yellow squash cultigen trial. Cumulative fruit number per acre and percentages, among all harvests¹. Clayton, Fall, 2017.

Cultivar

Marketable2

Culls3

Virus4

 Total

Percent

Marketable

Culls

Virus

Cosmos 12197 218 14375 26789 47 1 53
Goldprize 11652 545 11086 23283 49 2 49
Grandprize 19275 436 5663 25374 76 2 23
Multipik 15028 1198 7841 24067 62 5 33
Average 14538 599 9741 24878 58 3 39
LSD (0.05) 6864 996 6057 6227 21 4 21

1 Total of 12 harvests.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are   permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 18. Yellow squash cultigen trial yields¹. Number of fruit per acre by grade per indicated harvests for replicated treatments. Clayton, NC, 2017.

 Cultivar

Marketable2

Culls3

Virus4

Total

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Cosmos 7187 3485 1525 109 0 109 1742 5336 7296 9039 8821 8930
Goldprize 2505 6425 2723 436 109 0 3158 4661 3267 6098 11195 5990
Grandprize 7296 6207 5772 109 218 109 327 2505 2831 7732 8930 8712
Multipik 6643 5336 3049 545 545 109 2178 3158 2505 9365 9039 5663
Average 5908 5363 3267 300 218 82 1851 3915 3975 8059 9496 7324
LSD (0.05) 2538 3591 2171 704 513 290 1769 2577 2619 2315 3481 2306

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests 5-8 occurred on 29 September, 2, 4, and 6 October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are  permitted to be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
4 Fruit were discolored or rough/disfigured due to virus.


Table 19. Yellow squash cultigen trial1. Percent fruit number per acre per indicated harvests for replicated treatments. Clayton, NC, 2017.

Cultivar

Marketable2

Culls3

Virus4

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Cosmos 80 40 18 1 0 1 19 60 81
Goldprize 40 55 46 7 1 0 53 44 54
Grandprize 95 69 67 1 2 1 4 29 32
Multipik 71 59 48 5 8 2 24 34 50
Average 72 56 45 4 3 1 25 42 54
LSD (0.05) 22 22 29 7 9 4 22 24 30

1 Total of 12 harvests. Planting was 14 August 2017. Harvests 1-4 occurred on 20, 22, 25, and 27 September;  Harvests  5-8 occurred on 29 September, 2, 4, and 6 October; Harvests   9-12 occurred on 9, 11, 13, and 16 October.
2 Marketable fruit are graded into U.S. No. 1 (requires younger and more tender squash than U.S. No. 2 which are permitted to  be more mature and allows greater surface area to be affected by defects).
3 Culls consisted of primarily misshaped fruit.
  Fruit were discolored or rough/disfigured due to virus.


Table 20. Yellow Squash cultigen trial – Percent plant stand count and average fruit length and width among replicated treatments. Clayton, NC, 20171.

Cultivar

% Stand1

Fruit Size (mm) 2

Avg. Length

Avg. Width

Cosmos 90 15.6 3.7
Goldprize 83 13.3 4.2
Grandprize 83 14.5 3.8
Multipik 83 13.8 3.9
Average 85 14.3 3.9
LSD (0.05) 1.9 0.8

1 Final plant stand count was taken on 5 September 2017.
2 Fruit size measurements were taken at harvests 6 and 7, October 2nd and 4th, 2017