Title: Performance trials with sweet corn hybrids.
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 Material Information
Title: Performance trials with sweet corn hybrids.
Series Title: Performance trials with sweet corn hybrids.
Physical Description: Serial
Language: English
Creator: Guzman, V. L.
Publisher: Everglades Experiment Station
Place of Publication: Belle Glade, Fla.
Publication Date: Spring 1966
 Record Information
Bibliographic ID: UF00076911
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 166141111

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C)
Everglades Station Mimeo EES67-1 August, 1966

PERFORMANCE TRIALS WITH SWEET CORN HYBRIDS

V. L. Guzman/


Two trials were conducted, one observational and one replicated. In the
observational trial or screening stage those hybrids which offer no possibility
for the fresh market were eliminated. In the replicated trials, the most pro-
mising hybrids of the past season's screening tests were compared in special
designs and a reliable measure of their adaptability to this area was obtained
and treated statistically.

Character of the weather during the trials
The general character of the weather was of temperatures below normal, with
n majority of sunny days and cool nights. There was 2.67 inch precipitation
during February after the experiment was planted and the temperature reached a
mean maximum of 71.0 F and a mean minimum of 50.0 F. March temperatures were
below normal and precipitation was practically nili The mean maximum was 77.4F
and the mean minimum 54.1 F with 0.81 inch of rainfall. Temperatures and rain-
fall increased during April. The mean maximum was 81i50F, the minimum 57.9 F
and rainfall amounted to 2.88 inches. During May temperatures continued to
increase but rainfall was 0.30 inch to harvest of the experiment. The cool
nights probably caused slow growth of the corn plants, which matured a week
or more later than the usual spring planting.

Location, planting and harvest dates
Horticulture experiment 536 was seeded Februazry 1966 at Sam Senter
farm, field 1, on section 20, about five miles NE o~ the Station. Harvest
began May 11, 1966 and ended May 20, 1966.

Field plot technique
Single rows 40 feet long and 32 inches apa 'consituted the.'plot. In the
observational trial no replication was used. Th ireplcated trial had four
replications arranged in a complete randomized bl ck design-. T~oi to three
seeds were planted using a hand planter device in hils_ 8_.t inches apart
in the bottom of a shallow furrow. When the plants reached 6-8 inches in
height, thinning to one plant per hill was accomplished by cutting out the
extra plants at ground level. Yields were obtained from a single harvest
from the middle 30 feet of each row.

Fertility conditions
The experimental field had been planted to sweet corn during the previous
season. Soil analysis of samples taken at planting time showed a pH of 7.95,
18 pounds of phosphorus and 220 pounds of potassium per acre. This indicated
that the 1000 pounds of 4-8-24 applied broadcast plus the 500 pounds of 0-15-5
applied in bands at seeding was sufficient for the needs of the crop. Despite
the high pH of the soil, no minor element deficiencies were noted, probably
due to the generous supply of these elements in the fertilizer and slow growth
of the plants.



SHorticulturist, Everglades Experiment Station, Belle Glade, Florida




\00

E E
i 7- "-2-
AGRI.
CULTUpPr
LIDBR.
Weed, disease and insect control
Weeds were controlled by overall pre-emergence application of a mixture
of Randox and Vegadex at a total rate of 4 pounds per acre. Two mechanical
cultivations in addition to the herbicides kept the plots free of weeds.
Routine application of Manzate and insecticides by the farmer cooperator gave
excellent control of blight and insects. Relatively cool weather and the lack
of frequent rains also helped to keep the plants healthy.

Results
Tables 1 and 2 give results for the replicated and observational trials
respectively. Comments on hybrid performance will be restricted to the most
promising, which may deserve further trials. No helminthosporium blight indexes
were obtained in the unsprayed nursery trials due to the very light incidence
of the disease. For the yellow hybrids, 104 and 106 were the check varieties.
The earliest hybrid was Northern Belle 8m, which produced ears too short for
Florida's fresh market standards. The ears were slightly longer than 6 inches
and met the U.S. standard grade for fresh market, but were inferior in appearance
to the.checks. The next early hybrids were Wintergreen, Gold Cup 82-LS and
Golden Eagle. The best in this group was Wintergreen,which produced yields
similar to the checks and ears of good appearance. Golden Eagle followed, but
the yields of this hybrid were significantly inferior to the checks. Among
the midseason hybrids, E3107B,.XP299, E6D7, E3570, E5570 and E3596 yielded
similarly to the check, general appearance of the ear was good, but their
eating quality was only fair. Hybrid X100 was good eating quality, produced
yields similar to the checks, but its appearance was not as refined as that
of the checks. .Ears of hybrid 3373 had good appearance, fairly good eating
quality, but during this season many ears manifested severe dryback. The
above mentioned hybrids of the replicated trials deserve further evaluation.

Silver Queen was the check variety for the white sweet corn hybrids. There
were several white hybrids in the observational trials but none had the ear
appearance or the good eating quality of Silver Queen. Among the yellow hybrids
in the observational trials several were equal or slightly inferior to the
checks. The following showed promise for next year's trials: E5565, E5550,
E5545, E5575E, E5575A, E5585, E4D5 and Seneca XP150.

Key for hybrid sweet corn tables:
Source of seed: Name of company or individual supplying the seed; ASG-
Asgrow Seed, Milford, Conn.; F.M.-Ferry Morse Seed Co., Salinas, California;
J.H.- Joseph Harris Seed Co., Rochester, N.Y.; Rob- Robson Seed Farms, Hall,
N.Y.; Rog-.Rogers Bros. Seed Co., Caldwell, Idaho; SRS- Seed Research Specialists,
Gilroy, California; A.C.- Abbott and Cobb, Philadelphia, Pa., Cro Crookham
Seed Co., Caldwell, Idaho, 0 & G Seed Co., Caldwell, Idaho; Ch-Charter Seed Co.,
Twin Fall, Idaho.

Days.to maturity: Number of days from planting to harvest estimated by examining
10 ears and determining the day when the majority will reach optimum market
maturity.

Husk over ear tip: Approximate length of the husk over the tip of the ear.
A 1 indicates that the husk is shorter than one inch. A 2 indicates that the-
husk is about 1 inch and a 3 that the husk is longer than one inch.








-3-


Flag length: Estimated as mean flag length of 10 ears: 1 = shorter than 6
inches, 2 = about six inches and 3 = longer than 6 inches.

Ear length (inches): Mean ear length of 10 randomly selected marketable husked
ears per variety and replication.

Ear diameter (centimeters): Mean ear diameter of 10 husked ears, measured about
2.5 inches from the ear butt per variety and replication.

Unfilled ear tip (inches): Mean length of unfilled tip of 10 randomly selected
marketable ears per plot.

Number of rows (majority): Number of kernel. rows of 10 randomly selected ears
reported as a majority number.

Number of plants harvested: Number of plants producing ears in a 30 foot row.

Marketable number of ears per plant: Total number of U. S. Fancy and U.S. No.1
ears
Number of plants harvested.
Percentage U.S. Fancy ears: Number of U.S. Fancy ears in 10 ear samples taken
at random from the marketable ear class per variety and replication, reported
as percent.

Crates per acre: Estimated from the number of U.S. Fancy ears (5 doz/crate).

Tons per acre: Estimated from the total weight of U.S. Fancy and No. 1 ears.

Taste: One person's opinion on eatability of the ears judged from the taste of
raw fresh kernels: 1 = poor, 2 = fair, 3 = good.

Appearance: One person's opinion on husked appearance of the ears: 1 = poor,
2 = fair, 3 = good.



EES67-1







Table 1.--Yellow Sweet Corn Replicated Variety Trials Conducted on Sam Sente's
Harvested May 11-18, 1966 (Experiment 536).


farm, Belle Glade, Florida.


P4 -S ~ *&- !> = 3 (
Q) H to to M
S O fA M k t,
-p4 P, ::) Z :D Cd
U U *j 0
"D a, a, (U c3F 4 > r^h +
4 1 e s p < < d 3 ri H,
rd > tI H) a d u o 3 aH i ( n 0 0I 0
II43(1) (1 -)''$ t' 0 H ci) 0d 0

Cl 0 +4 .1 H) C) i4 ^ Sr *P 0 U-' (2 C>
o H H ILI 0 0 rl) 0 (I) F-44 a
o 0d 0P rd -P c
4) bD Hj p) Pci r-W 0P to
U H? CH Cl r. )a
k' (d ) cc 0
Q. C Cl) bfl *I- 33U (8 H V *) H ( 05 P
FP LI P~ >-I C4 )c ~ 0
Hybrids Pq A M H 9 1 : 9 1 L P, I &- I
---.-


Iobelle
106
R100
XP299
Wintergreen
Northern Belle 8m
Gold Cup 82-LS
Gold Cup 118G
Golden Eagle
3373
E6D7
E5535
E3595
E3570
E3107B
3107A
E3596
E5570
E5560
Seneca 125
LSD .05
LSD.01


CR
FM
ROG
ASG
ASG
JH
JH
JH
JH
SRS
SRS
FM
FM
FM
FM
FM
FM
FM
FM
ROB


7.5
7.9
7.8
7.9
7.3
6.5
6.7
7.9
7.4
8.4
7.5
7.3
8.2
8.2
8.2
8.3
8.1
8.1
8.2
7.1

2.4


4.33
4.25
4.64
4.43
4.10
4.39
4.26
4.28
4.34
4.34
4.34
4.61
4.47
4.11
4.25
4.36
4.36
4.23
4.54
4.46
0.13
0.17


0.4
0.2
0.3
0.3
0.3
0.2
0.2
0.4
0.5
0.5
0.2
0.5
0.6
0.1
0.5
1.0
0.4
0.5
0.6
0.2


40
40
39
39
40
40
34
4o
33
37
40
45
38
39
43
40
39
39
36
38


1.0
1.0
.9
1.0
1.0
0.9
1.0
1.0
1.0
1.0
1.0
1.0
0.9
1.0
0.9
1.0
1.0
1.0
1.0
1.1


39.5
39.3
36.3
38.0
40.0
34.5
34.5
41.3
32.8
38.5
42.3
44.5
34.3
39.0
39.5
38.8
38.5
38.3
34.5
38.8


26.8
28.0
27.4
26.1
23.0
21.8
20.7
24.5
22.1
26.5
28.2
31.7
29.0
26.7
29.0
29.7
30.2
30.8
23.1
24.4


359
357
330
346
364
314
314
375
298
350
384
405
311
354
359
350
350
348
314
353
47
62


88
98
88
93
88
60
60
88
80
80
93
78
78
93
83
68
93
83
85
73
17
23


7.3
7.6
7.4
7.1
6.3
5.9
5.6
6.7
6.0
7.2
7.7
8.6
7.9
7.3
7.9
8.0
8.2
8.4
6.3
6.6


1.
2.
3.
4.
5.
6.
7.
.8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.


3
3
2
3
2
1
2
2
2
2
2
2
2
3
3
2
3
3
2
2







Table 2 Yellow Sweet Corn Observational Variety Trials
Harvested May 11-20, 1966 (experiment 536).


conducted on Sam Senter Farm, Belle Glade, Florida.


M to
d ., (P Cd 1 P ^ o
HI 03 '. 4) g -0 h 1 n


21. ver een 88 35 3 45 1. 4 43 4 09 8.6 7.5 4.60 0.3 3 3 1 3 2+



22. Illinchief Illi. Ass. 89 25.0 21.0 32 0.4 1 40 0.8 40 40 291 5-7 7.5 4.65 1.0 1 S 2 16 2+ 1
23. 107 88 270 260 40 0 0 1. 44 0 364 .1 7.8 4.30 .1 2 3 14 1 3



24. 106A FM 86 20.8 20.8 29 o o 29 1.O 31 100 264 5.7 7.8 4.30 0.0 3 2 16 1 3
25. E5565 FM 86 29.5 27.5 41 0.4 1 42 1.o 42 90 373 7,5 7.8 4.35 0.2 1 3 25 2 3
26. E5555 FM 88 35. 28, 43 2.8 6 4 80 391 77 7.8 4.25 0.3 2 3 16 2 2




27. E5550 FM 88 28.5 28 38 0.5 1 39 1.o 40 90 345 7.6 8-0 4.30 0.5 2 3 16 2 3
28. iE5540 Q 85 30.0 29. 39 o 40 1.0 40 80 355 8.0 7.8 4.65 0.3 3 3 18 1+ 2+


29. E5530 I FM 85 22.0 20. 33 0.8 2 33 1.0.8 3540 80 300 57 7.8 4.35 0.6 1 2 2 16 1 2
30. E555 FM 85 28.0 26.5 37 0 34 1.1 35 90 336 7.2 75- 4.65 0.2 2 3 16 2 2
31. E5590 F 85 23.0 20.8 27 0 0 24 1.1 25 0oo 245 5.8 8.5 4.30 0. 3 3 14 1+ 3
32. E5575E FM 88 26.5 2.0 37 1.2 4 33 1.1 35 10o 336 6.8 7.8 4.30 0.2 1 14 12 3
33. E5575A FM 88 24.0 22.0 32 0. 3 1.0 32 0 0 291 6.2 8.0 4.35 0.51 2 14 1 3
34. E5585 FM 88 130.0 2. 19 1.2 03 20 1.0 214o 0 173 3.5 7.8 4.o6 0.3 3 14 1 3
35. EP3350 A 89 25.0 22.8 33 08 2 36 80 3 0 0 3 6.2 7.8 4.50 0.7 3 1 18 1 2



36. E4D5 SRS 88 18.5 15.0 24 1.2 3 31 0.8 33 90 218 4.1 8.0 4.10 0.3 3 2 14 2 2
37. E55200 SRS 85 23.5 23.5 37 0.0 37 1.0 38 60 336 7.3 7.8 4.05 0.8 1 2 14 2 2
38. E201 FM 88 173. 16.3 24 0.8 2 6 1.1 26 50 218 4.3 8.5 4.30 0.8 1 3 16 1 1
39. 202555 88 23.5 22.3 33 0 01 3 1.0 36 60 300 6.1 6.8 4.30 0.2 3 16 2 2
33. 20355 F 89 24.0 22.0 30 0 0 27 1.1 29 80 271 6.0 7.8 4.15 0.4 1 3 1 1 2
35. XP335 AsF 89 25.0 22.8 33 0.8 2 36 0.9 36 80 300 6.2 7.8 4.50 0.7 3 2 18 1 2+

37. 200 SFS 85 23.5 23.3 37 0.0 0 37 1.0 38 60 336 6.3 7.8 4.46 0.8 1 2 3 4 162 2
38. 201 SBS 88 17.5 16.0 24 0.8 246 .9 26 50 218 4.3 8.5 4.40 0.8 1 2 16 1 1


41. 204 SRS 85 28.8 25.3 39 1.8 5 39 1.0 41 80 355 6.9 7.5 4.40 0.5 3 2 16 1+ 2-
42. 205 SRs 88 31.3 30.0 45 0.8 2 43 1.0 44 80 409 8.2 8.0 4.30 0.3 3 3 14 1 2-
43. Iobelle A CR 86 37.5 36.0 48 0.8 2 b8 1.0 49 90 436 9.8 7.5 4.40 05 3 3 16 2 2+
44. Iobelle B CR 85 27.3 26.5 42 o 0 41 1.0 44 80 382 7.2 7.3 4.25 0.8 3 16 2 2+

l/ See key to tables.


~






Table 2 Yellow Sweet Corn Observational Variety Trials Conducted on Sam Senter Farm, Belle Glade, Florida.
Harvested May 11-20, 1966 (experiment 536).



OOc


45. seneca lO ROB 83 2.8 275 46 2.0 4 44 1. 44 70 48 75 7.0 .05 0. 3 3 16 2+ 2
462 60 382 78 68 4.1 0. 2 3 1 2
SR 8 2.7 2.0 3 1 5 80 30 6.0 7.0 4.5 1 3 14 2 2
0 83 36.3 30.8 50 4.5 34 1.5 O34 90 455 8.4 7.3 4.30 05 2 3 14 2+ cc


51. Golde n 1-8 A&c 85 3351 33 0. 2 33 1. 34 50 30 8.4 9 .5 4.90 0.8 1 1 14 Z 1



52. 642160 .o 83 27824..8 48 ,oo 33 1.3 36 ,90 436 6.7 7.5 4.25 0o.5 3 3 lr 3 2
53. Bonit NK 88 20.0175 271.2 261. 28 80 245 4.8 5 0.4 3 3

57Defender NK 88 20.5 20.0 32 0.5 33 0.9 36 80 91 5. 7-5 .00.6 33 2+ 2
Hybrids Vj ( C .i K4 *

45. Seneca MK100 ROB 83 29.8 27.5 46 2.0 4 44 1.0 44 70 418 7.5 7.0 4.05 0.6 2 3 16 2+ 1
46. Seneca XP160 ROB 83 32.0 28.5 42 2.0 5 42 1.0 42 60 382 7.8 6.8 4.15 0.3 2 3 16 2 2
47. Seneca XP155 ROB 83 24.7 22.0 33 1.2 3 34 10. 35 80 300 6.0 7.0 4.25 0.1 1 3 14 2 2
48. Seneca XP140 ROBL 83 36.3 30.8 50 4.5 10 34 1.5 34 90 455 8.4 7.3 4.30 0.5 2 3 14 2+ 2-
49. Seneca XP145 ROB 83 27.5.5 4. 4 2.0 5 31 1.5 31 30 445 6.965 4.25 0.2 1 3 14 2+ 1
50. Seneca XP150 ROB 83 20.0 17.3 30 .0 9 26 1.2 29 94 0 271 4.7 7.2 4.40 0.1 1 2 .14 2 2+
51. Golden 192-8 A&1 85 33.5 31.0 33 0.8 2 33 1.0 34 50 300 8.4 9.5 4.90 0.8 1 1 14 1 1
52. 642160 ROG 83 27.8 24.8 483 0. 33 1.1 36 90 436 6.7 7.5 4.25 0.5 3 3 12 3 2
53. Bonita 1mK 88 20.0 17.5 27 1.2 4 26 1.0 28 80 245 4.8 7.5 4.40 0.4 3 3 16 2 2+
54. NK1304 NK 85 21.0 20.0 30 0.8 2 28 1.0 29 90 271 5.4 7.5 4.25 0. 1 1 3 12 1 2
55. Snowdrift NK 88 23.3 21.0 33 0 0 32 1.0 35 80 300 5.7 7.8 4.40 0.6 1 2 16 1+- 2+
56. Country Sq. 4833 NK 89 24.5 24.0 33 0 0 33 1.0 35 70" 300 ;6.5 7.8 4.55 1.0 3 3 2 1
57. oDefender K 88 20.5 20.0 32 0.5 1. 33 0.9 36 80 291 5.4 7.5 4.40 0.6 3 31 20 2+ 2
58. NK81 Um 88 23.0 21.5 33 1.2 3- 34 1.0 37 50 300 5.8 6.8 4.35 0.4 2 3 16 2 1
59. NK75 MK 83 20.5 18.5 32 2.83 5 35 0.9 38 80 291 5.0 7.0 4.25 0.1 2 3 12 2+ 2
60. Golden Delight oK 85 23.5 21.0 31 1.2 3 34 0.9 35 80 282 5.7 7.0 450 1.0 3 3 16 1 1
61. Northern Belle L JH 82 33.0 30.0 46 1.2 3 45 1.0 46 10 418 8.2 6.5 4.45 0.2 1 3+l 14 2 1
62. Northern Belle LS JH 83 35.5 30.0 44 3.5 8 45 1.0 46 70 400 8.2 6.8 4.70 0.1 1 3 14 2 1
63. Northern Belle 131 JH 83 28.3 24.0 40 2.5 7 43 0.9 47 80 364 6.5 7.0 4.50 0.2 1 3 14 2+ :1
64. southern Belle 136 JH 88 37.5 34.5 49 1.2 3 45 1.1 46 go90 445 9.4 7.8 4.40 0.4 1 3 14 2 .1
65. Southern Belle 19 JH 88. 28.3 22.3 37 0.8 2 33 1.1 34 70 336 7.4 8.5 4.50 0.4 3 3 14 1 1
66. Gold Trophy IS JH 85 '29.0 28.5 146 0.5 1 4 1.1 44 70 418 7.8 7.5 4.45 0.2 1 3 14 2 1 P--
67. Gold Cup 118 J 85 27.5 25.0 40 5 2.037 1.1 39 80 364 6.8 7.5 4.25 0.6 1 3 16 2+ 2
3-9 C 190 29 0.8 0 34 0.9 38 70 264 4.4 7.8 4.20 0.6 1 2 16 2 1
/ See i:ey to ;ables.




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