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NC State Extension

2015 Yellow and Zucchini Squash Cultivar Evaluations

Horticulture Series # 213

2015 Squash booklet

Download the PDF version of the 2015 Zucchini Squash cultivar evaluations

Principle Investigators: Jonathan R. Schultheis, Professor and Vegetable Extension Specialist; Keith D. Starke, Research Associate; and W. Bradfred Thompson, Agricultural Research Specialist, Department of Horticultural Science, NC State University, Raleigh, NC 27695-7609.

Acknowledgements: We gratefully acknowledge the assistance of Cathy Herring, (Superintendent), and Kirby Jones, (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 trial. We also gratefully acknowledge the following employees for their assistance with the trial: Brooke Hadley and Laura Page.

We would also like to greatly thank the following seed companies for their cooperation and financial support: Abbott & Cobb, HM Clause, Sakata, Seminis/Monsanto, and Syngenta. We also want to acknowledge support for this study was provided by the U.S. Department of Agriculture, National Institute of Food and Agriculture, for the CucCAP Specialty Crop Research Initiative grant under award number 2015-51181-24285.

General Cultural Practices

The squash trials were initially established on black plastic mulch. Pesticides used on all plots were chemicals labelled for that crop, 2015 North Carolina Agricultural Chemicals Manual.

Disclaimer

This publication presents data from the cultivar evaluation trials conducted during 2015. 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

Summer squash production in North Carolina totaled 2,700 acres and carried an economic value of $4.6 million in 2013. North Carolina is the 7th largest producer of summer squash in the United States and this crop ranks among the top ten vegetables produced in the state. Commercial producers seek to grow the best performing squash cultivars with regards to yield and quality in order to maximize their return on investment and remain competitive in the market place. The zucchini market in North Carolina has typically been supplied with a medium green fruit, however, over the past few years the market has 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 as they are harvested in the fall when environmental factors favor increased presence of these plant pests.

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 cultivar in the field trial. 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. We hope this provides useful information and is of value in addition to the data that are typically contained in the report.

Materials and Methods

Seeds were sown on 3 August 2015. Hills with seed skips were replanted one week after planting to maximize plant stand counts in each plot. Final stand counts were taken 3 weeks after initial planting. This trial was planted into existing plastic mulch from a preceding squash trial. The herbicide Paraquat was applied to row middles at 3 pt/acre on 27 August. The insecticides Asana, FanFare, Perm-Up were rotated and applied as a preventative measure beginning 17 August and on the following dates: 26 August; 2, 11, 23 and 30 September. The following fungicide products were used: Bravo, Prevacur Flex, Penncozeb, Pristine, Procure, Ranman and Torino; and applied on the following dates: 17 and 26 August; 2, 11, 15, 18, 23 and 30 September. Fertilizer was applied through drip irrigation on the following dates: 19 and 26 August; 2, 9, 18, 23 and 30 September. Harvests were conducted three times per week with a total of 12 harvests for the trial. The first harvest was 9 September and the final harvest (#12) was completed on 8 October. Most fruit were harvested when the blossom was detached from the fruit and categorized as marketable or non-marketable. Fruit that were small or undersized, or were misshapen, were categorized as culls (non-marketable). On 29 September plant leaf samples were collected and sent for lab analysis to verify the presence of viral pathogens. On 10 October the lab test results were positive for the presence of Watermelon Mosaic Virus (WMV) in this trial. Virus symptoms were observed as early as harvests 1-4 and gradually increased through mid-season harvests (5-8). The greatest incidence of WMV occurred in the late season harvests (9-12). Graded fruit were weighed and counted for each category and plot. The trial design was a randomized complete block with four replications. Other quality measurements taken were: fruit color, plant vigor, percent plant stand, average fruit length and width, plant habit, and spine ratings. These measurements were taken using a rating system that is explained in the appropriate table. Overall, plant stands were excellent in all plots at 100%.


Table 1. Yellow squash seed sources and descriptions; Clayton, NC, 2015.

Observation #

Cultigen

Company

Descriptors

1 Cosmos Abbott & cobb Straight neck; green stem; shiny and smooth fruit; slender; elongated fruit with extended length in bulb portion; butter- yellow skin; small to medium size calyx
2 Goldprize Syngenta Straight neck; green stem; regular length and bulb stem proportions; fruit fairly smooth; medium size, protruding calyx
3 Solstice Abbott & Cobb Straight neck; some green and some yellow stems; smooth, shiny fruit; regular length fruit with good proportional bulb width and length dimensions; butter- yellow skin; small to medium sized calyx
4 SN0016 Syngenta Straight neck; green stem; shiny and smooth fruit; regular fruit with good proportional bulb width and length dimensions; attractive yellow fruit; small to medium sized calyx

Figure 1. Yellow Squash Cultigen pictures of Cosmos, Goldprize, Solstice, and SN0016


Table 2.1. Yellow Squash cultigen trial yields¹, number of Marketable 20 lb boxes per acre, per indicated harvests. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 167 151 67
Goldprize 216 196 70
Solstice 292 226 83
SN00126 236 256 165
Average
LSD (0.05)
2.8
1.2
207
89
96
77

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14, and 16 September. Harvests 5-8 occurred on 18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.


Table 2.2. Yellow Squash cultigen trial yields¹, number of 20 lb boxes of Culls² per acre, per indicated harvests. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 6 2 1
Goldprize 0 0 2
Solstice 1 3 0
SN00126 0 2 0
Average
LSD (0.05)
2
6
8
22
1
5

²Culls consisted primarily of misshaped fruit.


Table 2.3. Yellow Squash cultigen trial yields¹, number of 20 lb boxes Virus³ per acre, per indicated harvests. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 1 48 212
Goldprize 2 17 137
Solstice 0 71 170
SN00126 0 9 168
Average
LSD (0.05)
1
5
36
37
172
125

³ Fruit categorized as virus fruit displayed external virus symptoms such as splotchy discoloration and bumpiness.


Table 2.4. Yellow Squash cultigen trial yields¹, Total number of 20 lb boxes per acre, per indicated harvests. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 174 151 67
Goldprize 219 213 217
Solstice 293 301 253
SN00126 236 267 350
Average
LSD (0.05)
230
115
245
75
276
64

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14, and 16 September. Harvests 5-8 occurred on 18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.


Table 3.1. Yellow Squash cultigen trial yields¹, number of Marketable fruit per plant, per indicated harvests. Clayton, NC, 2015. Number of fruit per plant per harvest period4

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 2.4 3.1 1.2
Goldprize 2.1 3.7 1.2
Solstice 3.7 4.8 1.7
SN0016 3.2 4.6 2.5
Average
LSD (0.05)
2.8
1.2
4.0
1.3
1.7
1.6

1Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14, and 16 September. Harvests 5-8 occurred on 18, 21, 23 and 25.


Table 3.2. Yellow Squash cultigen trial yields¹, number of Culls² per plant, per indicated harvests. Clayton, NC, 2015. Number of fruit per plant per harvest period4

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 0.1 0.0 0.2
Goldprize 0.0 0.0 0.1
Solstice 0.0 0.1 0.0
SN0016 0.0 0.0 0.2
Average 0.0 0.0 0.1
LSD (0.05) 0.1 0.3

2Culls consisted primarily of misshaped fruit.


Table 3.3. Yellow Squash cultigen trial yields¹, number of fruit with Virus³ per plant, per indicated harvests. Clayton, NC, 2015. Number of fruit per plant per harvest period4

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 0.1 1.0 3.2
Goldprize  0.1 0.4 2.3
Solstice 0.0 1.4 3.0
SN0016 0.0 0.2 2.2
Average 0.0 0.7 2.7
LSD (0.05) 0.1 0.8 1.5

3Fruit categorized as virus fruit displayed external virus symptoms such as splotchy discoloration and bumpiness.


Table 3.4. Yellow Squash cultigen trial yields¹, Total number per plant, per indicated harvests. Clayton, NC, 2015. Number of fruit per plant per harvest period4

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 2.5 4.1 4.6
Goldprize 2.2 4.1 3.6
Solstice 3.7 6.3 4.7
SN0016 3.2 4.8 4.9
Average 2.9 4.8 4.4
LSD (0.05) 1.2 1.0 1.3

4Average number of fruit harvested from each plant at each harvest period (i.e.: 1-4; 5-11; 12-15).


Table 4.1. Yellow Squash cultigen trial. Percent by grade¹ Marketable fruit per indicated harvests by fruit yield. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 93.8 76 26
Goldprize 97.9 90 33
Solstice 99.1 76 32
SN0016 100.0 96 53
Average 97.7 84.5 36.2
LSD (0.05) 7.2 19.9 29.9

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September; Harvests 5-8 occurred on 18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.


Table 4.2. Yellow Squash cultigen trial. Percent by grade¹ Culls² per indicated harvests by fruit yield. Clayton, NC, 2015. 

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 3.4 1 3
Goldprize 0.0 0 4
Solstice 0.9 1 0
SN0016 0.0 1 4
Average 1.1 0.6 2.5
LSD (0.05) 2.8 1.9 6.8

²Culls consisted primarily of misshaped fruit.


Table 4.3. Yellow Squash cultigen trial. Percentage Virus³ symptomatic fruit per indicated harvests by fruit yield. Clayton, NC, 2015.

Cultivar

1 – 4

5 – 8

9 – 12

Cosmos 2.8 23 70
Goldprize 2.1 10 63
Solstice 0.0 22 68
SN0016 0.0 4 44
Average 1.2 14.8 61.2
LSD (0.05) 5.8 19.4 33.9

³ Fruit categorized as virus fruit displayed external virus symptoms such as splotchy discoloration and bumpiness.


Table 5. Yellow Squash cultigen trial yields, cumulative boxes, (20 lb), per acre, over all harvests.¹ Clayton, NC, 2015.

Cultivar

Marketable

Culls²

Virus

Total

Percent³

Marketable

Cull

Virus

Cosmos 384 14 261 659 59 2 39
Goldprize 482 11 156 649 73 2 25
Solstice 601 4 241 846 71 1 29
SN0016 657 19 177 852 78 2 20
Average 531 12 209 752 70 2 28
LSD (0.05) 166 20 159 148 21 3 22

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September; Harvests 5-8 occurred on  18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.
² Culls consisted primarily of misshaped fruit.
³ Percentages may be greater than 100% due to the rounding of percentages to the nearest whole number.


Table 6.1. Yellow Squash cultigen trial yields, total number of fruit per plant, over all 15 harvests.¹ Clayton, NC, 2015.

Cultivar

Marketable

Culls²

Total

Cosmos 6.7 0.3 11.1
Goldprize 7.0 0.1 9.9
Solstice 10.2 0.1 14.8
SN0016 10.2 0.2 12.8
Average 8.5 0.2 12.1
LSD (0.05) 2.8 0.3 2.6

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September; Harvests 5-8 occurred on  18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.
² Culls consisted primarily of misshaped fruit.
³ Percentages may be greater than 100% due to the rounding of percentages to the nearest whole number.


Table 6.2. Yellow Squash cultigen trial yields, total number of fruit per plant, over all 15 harvests.¹ Clayton, NC, 2015.

Cultivar

Percent³
Marketable

Percent³

Culls²

Percent³
Total

Cosmos 60 2 38
Goldprize 71 1 28
Solstice 69 1 31
SN0016 81 1 18
Average 70 1 28
LSD (0.05) 17 3 19

¹Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September; Harvests 5-8 occurred on  18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.
² Culls consisted primarily of misshaped fruit.
³ Percentages may be greater than 100% due to the rounding of percentages to the nearest whole number.

Table 7. Yellow Squash cultigen trial – Quality ratings. Percent stand count, powdery mildew, and average fruit length and width; Clayton, NC, 2015 ¹

Cultivar

% Stand2

Powdery Mildew3

Fruit Size
Average Length

(mm)4

Fruit Size
Average Width

(mm)4

Cosmos 100.0 3.1 14.9 3.9
Goldprize 100.0 3.5 13.8 4.2
Solstice 100.0 2.2 16.1 4.3
SN0016 100.0 3.0 14.7 4.3
Average 100.0 3.0 14.9 4.2
LSD (0.05)  – – 0.3 1.6 0.5

1 All ratings were statistically analyzed by SAS using least significant differences to separate
cultivar responses over 4 replications.
2 Percent stand was determined by number of plants in given plot on 24 August 2015.
3 Powdery mildew scale: 1=None, 2=Low, 3=Moderate, 4=High
4 Fruit length and width was taken by meauring 5 U.S. grade fancy
fruit from each plot at 5 dfferent harvests throughout the season


Table 8. Zucchini squash seed sources and descriptions; 2015.

Entry No.

Cultigen

Company

Description

1 Endeavor Sakata Medium green fruit; speckled fruit; straight with flaring at bulbuous end; average length fruits; fairly uniform shape and size
2 Payload Syngenta Medium green fruit; slight tapering as fruit enlarge toward blossom end; subtle ridging down fruit; average peduncle length; good commercial length of fruit; uniform shape and size; straight fruit
3 Respect Harris Moran Medium to dark green fruit; slight tapering as fruit enlarge toward blossom end; subtle ridging down fruit; average peduncle length; good commercial length of fruit that are slightly shorter size; uniform straight fruit
4 SB 0027 Syngenta Medium green fruit; sporadic speckling on fruit; slight taper toward blossom end; compact peduncle; average length; fruits; fairly uniform size and shape fruit with kink between neck and bulb of fruit
5 Spineless Beauty Syngenta Medium green speckled fruit; slight taper as fruit enlarges toward blossom end; ridging down fruit; average peduncle length; good commercial length of fruit; a few fruit curved slightly, otherwise generally uniform shaped fruit
6 Spineless Perfection Syngenta Medium to dark green fruit; slight tapering toward blossom end of fruit; ridging down fruit; average peduncle length; good commercial fruit length; uniform shape
7 SV 0474 YG Seminis Medium green, speckled fruit; slight tapering of fruit towards bulbous end; subltle ridging down entire fruit; average sized peduncle; average to slightly shorter fruits; very uniform shape and size
8 SV 0914 YG Seminis Medium to dark green fruit; slight tapering towards blossom end; ridging down entire fruit; compact to average length peduncle; excellent commercial length; very uniform size and shape
9 SV 6009 YG Seminis Dark green fruit; tapering of fruit toward blossom end; very subtle ridging (hardly visible); long peduncle; slightly shorter length of fruit; transgenic for virus resistance to ZYMV, CMV, and WMMV; however fruit shape and yield severely affected by virus in this study
10 SV 9043
YG
Seminis Dark green fruit; straight fruit that flares to larger blossom end; average size peduncle; good fruit length for commercial production

Figure 2. Zucchini Squash Cultigen pictures

Table 9. Zucchini squash seed sources and descriptors (observation entries); Clayton, NC, 2015.

Observation # Cultigen Company Description
11 Alfresco Tozer Light green / Mediterranean fruit type; straight fruit with taper towards blossom end; average peduncle size; average fruit length; fruit tend to be skinny
12 Midnight Tozer Medium to dark green fruit; straight fruit that flares wider at the blossom end; average size peduncle; good fruit length for commercial production
13 Parador Tozer Golden yellow fruit; straight fruit with pleasing gradual taper; average peduncle length; fruit were regular; average commercial length
14 Sunstripe Tozer Golden yellow fruit with light yellow stripes the length of the fruit; fruits tend to constrict in the middle of fruit (elongated dog bone shape; compact peduncle; pronounced ridging on fruit; fruit tend to be long and skinny
15 British Tozer Medium to dark green fruit; fruit tapers and become wider at blossom Summertime end; ridging at stem end of fruit; average peduncle length; good, fairly uniform fruit length and shape
16 Patio Star Tozer Medium to dark green fruit; Fruit constricts slightly in middle, then larger fruit width at blossom end than stem end; ridging

Figure 3. Zucchini Squash cultigen pictures (observation entries).

Table 10.1 Zucchini Squash cultigen trial yields¹, number of Marketable 20 lb boxes per acre, per indicated harvests for replicated trial. Clayton, NC, 2015.

Cultivar

 Harvest 1 – 4

  Harvest 5 – 8

 Harvest  9 – 12

1

2

1

2

1

2

Endeavor 108 85 190 51 85 50
Payload 106 60 261 84 118 104
Respect 127 83 182 34 127 97
SB0027 85 39 185 20 109 60
Spineless Beauty 75 78 170 35 62 25
Spineless Perfection 72 40 120 35 73 10
SV0474YG 144 99 199 56 143 58
SV0914YG 33 20 145 19 118 52
SV6009YG 170 56 222 30 97 5
SV9043YG 117 119 184 46 133 101
Average 104 68 186 41 107 56
LSD (0.05) 39 70 51 52 44 56

Table 10.2 Zucchini Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for replicated trial. Clayton, NC, 2015.

Cultivar

Culls2

Virus3

Total

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Endeavor 14 25 37 7 7 159 214 272 332
Payload 1 9 25 2 5 70 169 359 316
Respect 6 16 15 0 3 43 216 235 282
SB0027 8 9 34 1 1 51 132 215 255
Spineless Beauty 15 13 13 3 55 149 170 273 248
Spineless Perfection 3 9 14 2 8 95 118 171 191
SV0474YG 11 9 12 0 3 22 254 267 235
SV0914YG 12 7 23 0 0 2 65 171 195
SV6009YG 45 16 7 0 21 82 271 289 192
SV9043YG 21 6 13 0 4 72 257 240 320
Average 14 12 19 1 11 75 187 249 257
LSD (0.05) 26 24 38 7 21 102 94 78 100

Table 11. Zucchini Squash cultigen trial yields¹, number of Marketable 20 lb boxes per acre, per indicated harvests for observational plots. Clayton, NC, 2015.

Cultivar

 1 – 4

 5 – 8

 9 – 12

1

2

1

2

1

2

Alfresco 33 0 96 0 17 0
Midnight 44 52 33 44 30 41
Parador 48 0 159 24 24 0
Sunstripe 7 0 54 11 26 0
British Summertime 51 57 98 122 76 15
Patio Star 22 0 85 9 33 0
Average 34 18 87 35 34 9

Table 11. Zucchini Squash cultigen trial yields¹, number of 20 lb boxes per acre, per indicated harvests for observational plots. Clayton, NC, 2015.

Cultivar

Culls2

Virus3

Total

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Alfresco 0 0 0 0 52 137 33 148 154
Midnight 41 20 4 0 63 137 137 159 213
Parador 0 9 0 0 68 126 48 259 150
Sunstripe 0 15 0 0 96 76 7 196 102
British Summertime 9 7 0 0 17 81 115 244 172
Patio Star 0 7 15 13 37 54 35 118 102
Average 8 9 3 2 56 102 62 187 149

1 Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September. Harvests 5-8 occurred on 18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.
2 Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash than U.S. No.2. (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. Zucchini Squash cultigen trial. Percentage marketable, cull, and virus symptomatic fruit per indicated harvests¹ by NC, 2015

Cultivar

Marketable2

Culls3

Virus4

Percentage of yield based upon grade.

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Endeavor 89 89 46 8 8 12 4 3 42
Payload 99 96 69 0 3 7 1 1 24
Respect 98 90 79 2 9 7 0 1 14
SB0027 94 95 68 6 5 12 0 1 20
Spineless Beauty 92 76 34 7 5 5 1 19 61
Spineless Perfection 92 89 43 5 6 8 3 5 50
SV0474YG 96 96 88 4 3 5 0 1 7
SV0914YG 78 95 89 22 5 10 0 0 1
SV6009YG 86 88 57 14 5 3 0 7 40
SV9043YG 91 96 73 9 2 4 0 1 24
Average 91 91 64 8 5 7 1 4 28
LSD (0.05) 13 11 24 12 9 12 4 6 25

Table 13. Zucchini Squash cultigen trial. Percentage marketable, cull, and virus symptomatic fruit per indicated harvests1 by fruit yield for observational treatments. Clayton, NC, 2015.

Cultivar

Marketable2

Culls3

Virus4

Percentage of yield based upon grade.

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

 1 – 4

 5 – 8

 9 – 12

Alfresco 100 65 11 0 0 0 0 35 89
Midnight 70 48 34 30 12 2 0 40 64
Parador 100 71 16 0 3 0 0 26 84
Sunstripe 100 56 26 0 13 0 0 31 74
British Summertime 92 90 53 8 3 0 0 7 47
Patio Star 63 48 32 0 3 15 38 49 53
Average 87 63 29 6 6 3 6 31 69

1Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 14 and 16 September; Harvests 5-8 occurred on 18, 21, 23 and 25 September; Harvests 9-12 occurred on 28 and 30 September; 5 and 8 October.
2 Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash than U.S. No.2. (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 14. Zucchini Squash cultigen trial yields, cumulative boxes, (20 lbs.), per acre, over all harvests 1. Clayton, NC, 2015.

Marketable2

Cultivar

#1

#2

Culls

Virus4

Total

%Marketable

% Cull

% Virus

Percent

Endeavor 383 186 76 173 818 70.0 9.4 20.6
Payload 486 248 35 76 845 86.3 4.1 9.6
Respect 436 214 37 46 733 88.7 5.1 6.2
SB0027 380 119 51 53 602 83.5 8.1 8.4
Spineless Beauty 307 138 40 207 692 63.6 5.8 30.6
Spineless Perfection 265 85 26 105 480 71.2 5.8 23.0
SV0474YG 487 213 32 25 757 93.6 3.7 2.7
SV0914YG 297 90 42 2 431 90.3 9.3 0.4
SV6009YG 490 91 68 104 752 77.7 8.5 13.8
SV9043YG 435 267 39 76 817 86.1 5.1 8.8
Average 396 165 44 87 693 81.1 6.5 12.4
LSD (0.05) 83 106 48 109 199 11.3 6.0 12.4

Table 15. Zucchini Squash cultigen trial yields, cumulative boxes, (20 lbs.), per acre, over all harvests ¹. Clayton, NC. 2015.

Marketable2

Cultivar

#1

#2

Culls3

Virus4

Total

% Marketable

% Cull

%Virus

Alfresco 146 0 0 190 335 43.5 0.0 56.5
Midnight 107 137 65 200 510 47.9 12.8 39.3
Parador 231 24 9 194 457 55.7 1.9 42.4
Sunstripe 87 11 15 113 227 43.3 6.7 50.0
British Summertime 224 194 15 98 531 78.7 2.9 18.4
Patio Star 139 9 22 163 333 44.4 6.5 49.0
Average 159 62 21 160 399 52.2 5.1 42.6

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. (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 16. Zucchini Squash cultigen trial yields¹, average number of Marketable³ fruit per plant, per indicated harvests. Clayton, NC, 2015.

Cultivar

Harvest 1 – 4

 Harvest 5 – 8

 Harvest 9 – 12

#1

#2

#1

#2

#1

#2

Endeavor 1.40 0.47 3.04 0.31 1.08 0.23
Payload 1.35 0.33 3.78 0.50 1.68 0.53
Respect 1.90 0.58 2.95 0.23 1.70 0.38
SB0027 1.33 0.25 3.00 0.15 1.58 0.33
Spineless Beauty 1.07 0.45 2.38 0.23 0.95 0.13
Spineless Perfection 1.18 0.23 1.95 0.25 1.18 0.05
SV0474YG 1.88 0.65 3.37 0.35 2.15 0.28
SV0914YG 0.50 0.10 2.28 0.10 1.60 0.25
SV6009YG 2.34 0.39 3.63 0.21 1.20 0.03
SV9043YG 1.38 0.63 2.90 0.33 1.50 0.48
Average 1.43 0.41 2.93 0.26 1.46 0.27
LSD (0.05) 0.52 0.34 0.60 0.30 0.55 0.28

Table 16. Zucchini Squash cultigen trial yields¹, average number of fruit culls4per plant, per indicated harvests. Clayton, NC, 2015.

Cultivars  1 – 4  5 – 8  9 – 12
Endeavor 0.10 0.13 0.10
Payload 0.03 0.15 0.15
Respect 0.10 0.10 0.10
SB0027 0.10 0.15 0.28
Spineless Beauty 0.10 0.18 0.15
Spineless Perfection 0.05 0.13 0.15
SV0474YG 0.15 0.03 0.13
SV0914YG 0.13 0.13 0.13
SV6009YG 0.47 0.31 0.08
SV9043YG 0.30 0.08 0.15
Average 0.15 0.14 0.14
LSD (0.05) 0.19 0.14 0.22

Table 16. Zucchini Squash cultigen trial yields¹, average number of fruit virusper plant, per indicated harvests. Clayton, NC, 2015.

Cultiar

 1 – 4

 5 – 8

 9 – 12

Endeavor 0.05 0.08 1.30
Payload 0.03 0.05 0.70
Respect 0.00 0.05 0.31
SB0027 0.03 0.03 0.38
Spineless Beauty 0.05 0.78 1.28
Spineless Perfection 0.03 0.10 1.08
SV0474YG 0.00 0.05 0.18
SV0914YG 0.00 0.00 0.03
SV6009YG 0.00 0.33 0.91
SV9043YG 0.00 0.05 0.85
Average 0.02 0.15 0.70
LSD (0.05) 0.07 0.28 0.88

Table 16. Zucchini Squash cultigen trial yields¹, total number of fruit per plant, per indicated harvests. Clayton, NC, 2015.

Cultivar

 1 – 4

 5 – 8

 9 – 12

Endeavor 2.01 3.56 2.71
Payload 1.73 4.48 3.05
Respect 2.58 3.33 2.48
SB0027 1.70 3.33 2.55
Spineless Beauty 1.68 3.55 2.50
Spineless Perfection 1.48 2.43 2.45
SV0474YG 2.68 3.80 2.73
SV0914YG 0.73 2.50 2.00
SV6009YG 3.20 4.47 2.22
SV9043YG 2.30 3.35 2.98
Average 2.01 3.48 2.57
LSD (0.05) 0.65 0.62 0.60

Table 17. Zucchini Squash cultigen trial yields1, average number of fruit per plant, per indicated harvests. Clayton, NC, 2015.

Marketable³

Cultivar

 1 – 4

 1 – 4

 5 – 8

 5 – 8

 9 – 12

9 – 12

#1 #2 #1 #2 #1 #2
Alfresco 0.67 0.00 1.77 0.00 0.30 0.00
Midnight 0.60 0.40 0.60 0.40 0.50 0.30
Parador 0.80 0.00 3.10 0.20 0.60 0.00
Sunstripe 0.20 0.00 1.40 0.20 0.70 0.00
British Summertime 0.78 0.44 1.66 0.66 1.20 0.10
Patio Star 0.30 0.00 1.40 0.10 0.60 0.00
Average 0.56 0.14 1.66 0.26 0.65 0.07

Culls4

Cultivar

 1 – 4

 5 – 8

 9 – 12

Alfresco 0.00 0.00 0.00
Midnight 0.40 0.30 0.10
Parador 0.00 0.20 0.00
Sunstripe 0.00 0.30 0.00
British Summertime 0.10 0.20 0.00
Patio Star 0.00 0.20 0.40
Average 0.08 0.20 0.08

Virus5

Cultivar  1 – 4  5 – 8  9 – 12
Alfresco 0.00 1.22 2.10
Midnight 0.00 0.70 0.60
Parador 0.00 0.70 1.50
Sunstripe 0.00 0.70 0.70
British Summertime 0.00 0.44 0.78
Patio Star 0.10 1.30 0.90
Average 0.02 0.84 1.10

Total

Cultivar

 1 – 4

 5 – 8

 9 – 12

Alfresco 0.67 3.00 2.44
Midnight 1.40 2.00 1.50
Parador 0.80 4.20 2.10
Sunstripe 0.20 2.60 1.60
British Summertime 1.33 3.00 2.10
Patio Star 0.40 3.00 1.70
Average 0.80 2.97 1.91

1 Total of 12 harvests. Planting was August 3, 2015. Harvests 1-4 occurred on 9, 11, 13 and 16 September. Harvests 5-8 occurred on 18, 21, 23 and 25 September;
Harvests 9-12 occurred on 28 and 30 September; 5 and 8 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. (permitted to be more mature and allows greater surface area to
be affected by defects).
4 Culls consisted primarily of misshaped fruit.
5 Fruit were discolored or rough/disfigured due to virus.


Table 18. Zucchini Squash cultigen trial yields, cumulative fruit number per plant, over all 12 harvests ¹. NC, 2015.

Cultivar

#1

#2

Culls3

Virus4

Total

Marketable

Cull

Virus

Endeavor 5.5 1.0 0.3 1.4 8.3 79 4 16
Payload 6.8 1.4 0.3 0.8 9.3 88 3 9
Respect 6.6 1.2 0.3 0.4 8.4 92 4 4
SB0027 5.9 0.7 0.5 0.4 7.6 88 7 5
Spineless Beauty 4.4 0.8 0.4 2.1 7.7 66 6 28
Spineless Perfection 4.3 0.5 0.3 1.2 6.4 75 6 19
SV0474YG 7.4 1.3 0.3 0.2 9.2 95 3 2
SV0914YG 4.4 0.5 0.4 0.0 5.2 92 7 0
SV6009YG 7.2 0.6 0.9 1.2 9.9 79 9 13
SV9043YG 5.8 1.4 0.5 0.9 8.6 84 6 10
Average 5.8 0.9 0.4 0.9 8.1 84 5 11
LSD (0.05) 0.9 0.5 0.3 1.0 1.3 10 4 10

Table 19. Zucchini Squash cultigen trial yields, cumulative fruit number per plant, over all 12 harvests.¹ Clayton, NC, 2015.

Cultivar

Marketable2
#1

Marketable2
#2

Culls3

Virus4

Total

% Marketable

% Cull

% Virus

Alfresco 2.8 0.0 0.0 3.3 6.1 45 0 55
Midnight 1.7 1.1 0.8 1.3 4.9 57 16 27
Parador 4.5 0.2 0.2 2.2 7.1 66 3 31
Sunstripe 2.3 0.2 0.3 1.6 4.4 57 7 36
British Summertime 3.7 1.2 0.3 1.2 6.4 76 5 19
Patio Star 2.3 0.1 0.6 2.1 5.1 47 12 41
Average 2.9 0.5 0.4 2.0 5.7 58 7 35

¹Total of 12 harvests.
² Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash) than U.S. No.2. (permitted to be more mature and allows greater surface area to be affected by defects).
³ Culls consisted of primarily misshaped fruit.


Table 20. Zucchini Squash cultigen trial – Quality ratings. Percent stand count, plant vigor, color rating, plant habit, spine rating, percent broken, NC, 2015.

Cultivar

%
Stand1

Plant
Vigor 2

Color
Rating3

Culls
habit4

Spine
Rating5

Endeavor 100 8.5 3.5 6.8 2.8
Payload 100 7.5 3.6 2.8 3.8
Respect 100 6.5 4.1 1.8 2.5
SB0027 100 8.5 3.7 3.8 1.0
Spineless Beauty 100 7.0 3.1 5.0 1.0
Spineless Perfection 100 8.0 3.6 3.5 1.0
SV0474YG 100 7.0 3.5 1.0 6.0
SV0914YG 100 8.8 3.6 1.5 1.3
SV6009YG 100 4.5 4.1 1.0 5.8
SV9043YG 100 8.0 3.9 1.8 3.3
Average 100 7.4 3.7 2.9 2.8
LSD (0.05)  – – 1.0 0.2 1.1 0.9

Cultivar

Virus
Broken 6

%
Normal

Powdery
Mildew7

Average
Length
(mm)

Average
Width

(mm)

Endeavor 5.0 95.0 1.6 15.5 4.0
Payload 2.5 97.5 1.5 15.2 3.9
Respect 7.5 92.5 1.3 15.7 3.8
SB0027 10.0 90.0 1.6 15.0 3.5
Spineless Beauty 2.5 97.5 2.5 16.4 4.1
Spineless Perfection 25.0 75.0 2.0 15.4 3.7
SV0474YG 10.0 90.0 1.0 15.4 4.1
SV0914YG 2.5 97.5 1.3 14.8 3.6
SV6009YG 2.5 97.5 2.8 14.8 3.9
SV9043YG 0.0 100.0 2.0 15.8 3.9
Average 6.8 93.3 1.8 15.4 3.9
LSD (0.05) 13.3 13.3 0.7 1.3 0.4

1 Final stands were taken on 24 August 2015.
2 Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash) than U.S. No.2. (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. 5=ebony; 4=dark green; 3=average green; 2=light green; 1=yellow.
4 Plant habit ratings: 1 = open; 9 = closed.
5 Spine Rating: 1 = No spines present; 9 = prolific spines present.
6 % Broken: Percentage of plants broken within plot among cultivars.
7 Powdery mildew scale: 1=None, 2=Low,  3=Moderate, 4=High.
8 Fruit length and width was taken by measuring 5 U.S. grade fancy fruit from each plot at 5 dfferent harvests throughout the season.


Table 21. Zucchini Squash cultigen trial – Quality ratings. Percent stand count, plant vigor, color rating, plant habit, spine rating, NC, 2015.

Cultivar

%
Stand1

Plant
Vigor2

Color
Rating3

Culls
habit4

Spine
Rating5

Alfresco 100 8.0 2.0 7.0 1.0
Midnight 100 5.0 4.0 7.0 3.0
Parador 100 8.0 1.0 2.0 3.0
Sunstripe 100 9.0 1.0 2.0 1.0
British Summertime 100 7.0 3.8 2.0 5.0
Patio Star 100 5.0 3.7 5.0 1.0
Average 100 7.0 2.6 4.2 2.3

Cultivar

Virus
Broken6

%
Normal

Powdery
Mildew7

Average
Length
(mm)

Average
Width
(mm)

Alfresco 10.0 90.0 3.5 15.6 3.4
Midnight 0.0 100.0 3 16.0 3.7
Parador 0.0 100.0 2.5 16.4 3.8
Sunstripe 0.0 100.0 2 16.2 3.3
British Summertime 20.0 80.0 3.5 17.4 4.2
Patio Star 0.0 100.0 3.5 10.1 3.5
Average 5.0 95.0 3.0 16.3 3.7

1 Final stands were taken on 24 August 2015.
2 Marketable fruit are graded into U.S. No.1 (requires younger and more tender squash) than U.S. No.2. (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. 5=ebony; 4=dark green; 3=average green; 2=light green; 1=yellow.
4 Plant habit ratings: 1 = open; 9 = closed.
5 Spine Rating: 1 = No spines present; 9 = prolific spines present.
6 % Broken: Percentage of plants broken within plot among cultivars.
7 Powdery mildew scale: 1=None, 2=Low,  3=Moderate, 4=High.
8 Fruit length and width was taken by measuring 5 U.S. grade fancy fruit from each plot at 5 dfferent harvests throughout the season.