Title: Horticultural trials with sweet corn hybrids.
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 Material Information
Title: Horticultural trials with sweet corn hybrids.
Physical Description: Serial
Language: English
Creator: Guzman, V. L.
Publisher: Everglades Research Station, University of Florida
Place of Publication: Belle Glade, Fla.
Publication Date: 1965
 Record Information
Bibliographic ID: UF00076912
Volume ID: VID00008
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.

Full Text




Everglades Station Mimeo EES66-2 /July, 1965

HORTICULTURAL TRIALS WITH c RIDS

V. L. Guzman-


One observational and one replicated trial were conducted. In the observa-
tional trial or screening stage those varieties which offer no possibility for the
fresh market were eliminated. In the replicated trials, the most promising hy-
brids of the past season's observational trials were compared in special designs
and a reliable measure of their possibilities was obtained and statistically
treated.

Character of the weather during the trials
On February 26, when the plants were 16 days old, they were covered with soil
to prevent damage by a massive cold wave which hit this area killing most of the
sweet corn. After the cold wave, the plants were uncovered and thus saved from
the intense cold that killed all the corn around the experimental field. The
covering and uncovering with muck soil damaged the corn somewhat, but the experi-
ment was saved from the killing frost. Prior to February 26, temperatures and
rainfall were above normal for this month. Winds varying in intensity prevailed
most of the month, causing leaf burning. During March temperatures and rainfall
were about normal, although some scattered frost occurred during the 9th and 10th.
The corn plants did not suffer materially except for a check in growth. The rest
of the growing season was characterized by low rainfall and temperatures about nor-
mal.

Location, planting and harvest dates
Horticulture experiment 522 was seeded on February 10, 1965 at Wedgworth farm
No. 6, field 8,about 2.5 miles NE of the Station. Harvest began on April 28, 1965
and ended on May 21, 1965. Rows 70 to 74 were seeded February 19 and rows 75 to 80
on March 5, 1965.

Field plot technique
Single rows 40 feet long and 3 feet apart with 30 feet harvest row constituted
the plot. Two to three seeds were dropped by. hand in hills 8 to 9 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 done by cutting but the extra plants at ground
level. Yields were obtained from a single pulling from the middle 30 feet of each
row. In the replicated trials a one row plot was employed in a complete randomized
block design with four replications.

Fertility conditions
The experimental field was cropped to celery prior to planting the corn. Soil:
analysis of this muck soil gave a mean pH of 6.88 with 16 pounds of soluble phos-
phorus and 240 pounds of potassium. No additional fertilizer was applied. After
the various cold spells, the young plants looked chlorotic, Three sprayings with
manganese sulfate and the return of good weather conditions seemed to correct
the color of the leaves.


- Associate Horticulturist, Everglades Experiment Station, Belle Glade, Florida











Weed, disease. and insect control
Weeds were controlled by pre-emergence application of 6 pounds/A of Randox
one day after planting, one mechanical scratching and one hand pulling of large
weeds. The corn was grown under flat culture, without deep lay-by ridges. The
control of insects was satisfactory, but due to the differences in age of the
experimental corn and that of the farmer, more insects were found in the experi-
ment than in the commercial crop,' particularly the stem weevil. Diseases were
controlled by biweekly applications of manzate or nabam and zinc sulfate. The
incidence of blight at the end of the growing season was moderate.

Results
Tables 1 and 2 give results for the replicated and observational trials re-
spectively.

Hybrids 104 and 106 were the check varieties. Yield of hybrid 104 was low due
to poor germination of carry over seed. The earliest hybrid was Northern Belle, but
it yielded low and had ears with poor appearance. Ears of hybrids 33.73 and
Golden Valley had fairly good appearance, but their blight ratings were high.
Hybrid XP 205 showed good tolerance to leaf blight, ears of good length, fairly
good appearance and yields, but the diameter of the husked ear was a little small
to make a good pack. All hybrids tested failed to have all the desirable char-
acteristics and they were inferior to 106 in appearance of the husked ear. How-
ever, Wintergreen, 33.73, E3107A, E 3570 and Golden Valley may deserve further
trial. Yields of these hybrids were similar to the check varieties, except for
Golden Valley which produced significantly lower yields. Wintergreen showed tol-
erances to leaf blight and had good plant vigor, but the appearance of the husked
ear was only fair, mainly due to missing kernels in few of the ears, probably
due to poor pollination, Hybrids E3570A and E2570 had good blight tolerance, but
had a tendency of producing green tips, due to poor husk cover over the tip of the
ear. Only hybrids 33.73, E3570 and Golden Valley produced 90 percent of Fancy
ears, although slightly inferior to the checks.

In addition to the yellow sweet corn checks 104 and 106 Silver Queen was
the check for the white hybrids in the observational trials. All of the white
hybrids were inferior to Silver Queen particularly in percentage of Fancy ears
and appearance of the husked ear. In the yellow lines, there were several new
hybrids equal or slightly inferior, but not better than the checks. The following
showed promise for next year trials: XP 299, R-100, E6D7, 204x1359/64, F15/64,
F45/64, 49-1209x758/63, 1161x1921/63, E3595, E3107B, and Seneca MK125-W-silk.
Key for hybrid sweet corn tables:
Source of seed: Name of company or individual supplying the seed; ASG- Asgrow
Seed, Milford, Conn.; Cor. Corneli Seed Co., St. Louis 2, Mo;; F.M.- Ferry Morse
Seed Co., Salinas, California; J. HL, 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; Hol Hplmes Seed Co., Canton,
Ohio; A.C. Abbott and Cobb, Philadelphia, Pa., Cro Crookham Seed Co., Caldwell,
Idaho; O ~ G Seed Co. Caldwell, Idaho.








Table 1 Yellow Sweet Corn Replicated Variety Trials Conducted on Wedgworth farm, Belle Glade, Florida. Harvested
April 28 to May 12, 1965 (experiment 522).





4 *V I a o o 0) )
ro e 0 4 W 4 mE
C U on u e i U* ue o oo


o > e c e o o > = e a 0 1
IL t r= O .H >1 <
Iobe) CR 91 30 0 .1 02 13 2 1 1 9
2. 106 F.M 89 1.0 3.0 8.3 .16 31 1.0 3.0 22.1 31 20.0 252 93 .9 2.0 .0
3373 SRS 89 .21 0.3 32 10 .0 22.1 31 20.0 250 0 .8 2.5 3.0









5. Golden hybrid 191-4 ASC 89 3.0 3.0 7.9 W.34 0.2 14 29 0.9 r.5 20.3 25 17.9 202 85 4.3 2.0 2.5
S0 ~ 3 0 3 3 30 20.0 28 85 2
S0 6 0 0 28 31 8 5 2
8. E3107A F.M 89 1.5 2.8 9.2 .32 0.6 36 0.9 .0 26. 312.0 28 83 5.8 2.0 2.3
9. E3570 F.M 91 1.3 2.5 8.5 .17 0.2 261.0 2.5 20.7 26 17.2 212 90 .2 2.8 3.0
0. F75/6 F.M 91 1.0 2.5 9.7 5 0.3 31 U 3.5 422.1 26 17.9 206 65 .3 2.3 1.3
Varieties to 0 4 4 o 0 g
o : i H W i 0 .0 0 0) 0) 0 .04
U)-I Q IW. =- a z -a -I I= >- E- -- -

1. obe lle (104) CR 91 2.8 3.0 7.0 4.31 0.2 14- 29 0.8 4.5 19.3 22 15.5 179 95 3.8 2.0 3.0
2. 106 F.M 89 1.0 3.0 8.3 4.16 0.1 14 31 1.0 3.0 22.1 31 20.0 252 93 4.9 2.0 4.0
3. Wintergreen ASG 89 3.0 2.5 7.7 4.25 0.4 14 39 0.9 2.5 24.6 34 21.4 276 83 5.2 2.0 2.3
4. 3373 SRS 89 1.8 3.0 8.5 4.21 0.3 14 32 1.0 4.0 22.1 31 20.0 250 90 4.8 2.5 3.0
5. Golden hybrid 191-1 A&C 89 3.0 3.0 7.9 4.34 0.2 14 29 0.9 4.5 20.3 25 17.9 202 85 4.3 2.0 2.5
6, 1131x1921/63 F.M 89 2.0 2.0 8.0 4.17 0.3 14 3 1.08 3.0 23.4 30 20.0 238 85 4.8 2.0 2.8
7. 1470x1921/63 F.M 89 2.0 3.0 7.6 3.96 0.3 14 36 1.1 2.5 25.9 40 21.8 321 80 5.3 2.5 2.3
8. E3107A F.M 89 1.5 2.8 9.2 4.32 0.6 14 36 0.9 3.0 26.4 31 24.0 248 83 5.8 2.0 2.3
9. E3570 F.M 91 1.3 2.5 8.5 4.17 0.2 14 26 1.0 2.5 20.7 26 17.2 212 90 4.2 2.8 3.0
10. F75/64 F.M 91 1.0 2.5 9.7 4.45 0.3 14 31 0.8 3.5 22.1 26 17.9 206 65 4.3 2.3 1.3
11. Golden Valley N.K 89 2.8 3.0 7.9 4.22 0.2 14-6 28 0.8 4.0 17.8 24 12.6 192 90 3.0 2.8 3.0
12. Xp 205 ASG 89 1.6 1.8 8.1 3.96 0.3 12 32 1.0 2.5 18.5 31 16.3 246 83 4,0 2.3 2.5
13. Gold Cup C1186 JH 89 2.0 1.3 8.1 4.12 0.6 14 33 1.0 2.5 22.2 32 18.8 260 75 4.6 3.0 1.8
14. Northern Belle L. JH 77 2.5 1.5 7.0 4.02 0.3 14 31 0.6 3.0 13.2 17 8.2 139 68 2.0 2.0 1.3

LSD .05 61
LSD .01 82






-3-


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-
.ndieates that the husk is shorter than one inch. A 2- indicates that the husk
is about one inch and a 3 thai the husk is longer than one inch .

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

Blight index: Helminthosporium turcicum leaf blight rating on unsprayed plants.
Zero- no blight; 5 severe blight (E, A. Wolf).

Percentage U.S. Fancy ears: Nimber of U.S. Fancy ears in 10 ear samples taken
at random.from the marketable ear class per variety and replication, reported
as percent.

Tons per acre: Estimated from'the total weight of U.S. Fancy ears.

Taste: One person's opinion on eatability of the ears judged from the taste of
raw fresh kernels: 1 = poor, 2 = fair, 3 = fairly good and 4 = good.

Appearance: One person's opinion on husked appearance of the ears: 1 = poor,
2 = fair, 3 = fairly good and 4 = good.




EES66-2
500 copies







Observational Trials of Yellow Sweet Corn, Conducted
Harvested from April. 28 to'May 21 ( Experiment 522).


at Wedgworth farm, Belle Glade, Florida.


Varieties


107
Floribelle
Silverqueen
106A
5299
Gavinet
N.K. 1304
Snow Drift
Bonita
5311
KVfSL-012
KVf4L-001
KVf5L-011
KVf5L-010
Xp-298
Xp-299
Xp-300
White Lot. 182-2
Golden "194*6
White "194-7


to

0


Ca
o

CO


x

*0


,4
.A.


Ca


I I I t -I I- I I I 1-


F.M
SRS
ROG
F.M
N.K
N.K
N.K
N.K
N.K
N.K
N.K
COR
COR
COR
ASG
ASG
ASG
AC
AC
AC


3.0
2.5
4.0
3.5
4.0
4.0
4.5
4.5
4.0
3.5
2.5
4.0
4.0
3.0
4.5
3.5
3.0
3.0
4.0
4.0


23.0
22.5
28.0
21.5
24.0
16.0
13.8
18.0
22.3
:20.3
21.0
26.0
23.3
33.3
17.5
25.3
19.3
25.5
19.8
13.0


19.8
20.3
25.8
18.3
21.5
05.5
05.5
15.3
18.8
18.5
17.3
22.3
20.0
29.3
16.8
23.3
17.3
19.3
16.3
07.3


0.89
0.94
1.09
1.03
0.82
0.26
0.33
0.81
0.78
0.94
0.76
0.86
0.91
0.98
1.31
0.88
0.86
0.86
0.88
0.61


O
0



*

e 3
0
u
0
r f
I f,


>0


04
0
*4

M


*
0

0




Ow
.34
0u


I- I- ?I


100
80
90
100
30
80
40
70
80
70
70
80
80
70
90
90
70
60
70
10


2.0
2.0
3.0
3.0
1.0
1.0
3.0
1.0
3.0
3.0
2.0
1.0
3.0
1.0
3.0
3.0
2.0
2.0
3.0
2.0


1.0
3.0
3.0
1.0
1.0
1.0
3.0
1.0
3.0
1.0
1.0
1.0
3.0
1.0
2.0
3,0
2.0
1.0
3.0
2.0


4.25
4.50
4.25
4.20
4.20
4.50
3.90
4.50
4.40
4.00
4.05
4.60
4.20
4.60
3.95
4.30
4.00
4.50
4.60
4.80


C 0 4 *


o 4 4 V
4.40 0 C

W I S z
.-. 4 0 0 4
wfd Z4.3


7.8
7.5
8.0
8.0
9.3
8.0
i7.3
8.5
8.5
8.5
8.8
8.0
8.0
8.2
8.3
8.8
8.0
7.5
8.3
7.5


0.1
0.4
0.2
0.1
1.0
1.5
0.4
1.0
0.5
1.5
1.5
0.4
0.3
1.0
0.1
0.2
0.8
1.5
0.5
1.5


14
16
L2-14
14
14
14
LO-12
16
14
12
18
14-Z
16
14
14
14
14
14
16
20+


Table 2 -


I T 9 1


3 3 I








Table 2 (continued

0 4 8








39.___- E- D-- SRS-89- .5- 27.5-3-22.8-7-4 0.95 31-80-2.0-1. -.10 8.00.3 12 3
.z z .
S(U






35 d DS 892.0 2.3 2 170 36 0. 218 80 3.0 3.0 C.0 8 0.0 10 1 2
S4J woV ) w 1*








37. Ex2D7 FM 89 3.5 20. 25 23.50 8 33 1.76 232 80 2.0 1.0 3.95 7.5 0.2 14 3
3. 1 89 90 3.0 20 .5 8 0. 14 3



39. E D1 89 3. 25. 3 22.8 10.9 5 0 .0 1.40 M.0 .8 0.4 12 3 3
.0 20 2 170 6 0. 2 80 0 E.0 0.5 1 2 2





2 /6 FM 89 3. 24.0 2. 1. 2 90 2.0 .0 .5 .5 0. 1 2 2
f 1 FM 89 3. 2. 3 2 0 1. 2 0 3.0 2.0 .5 0. 1 3 3
FM .0 0 0.6 0 3.0 1.0 1.20 .4 0.3 18 2 4








o5. E57/95 FM 89 2. 2.0 30 2. 63 0.7 274 90 2.0 .0 .05 8.3 0.1I 16 3 3
W-4 0 : +1 ( 0 (_ 5 3 0 0 g


35. Improved 31 AC. 92 4.5 19.3 26 17.3 3 29 0.90 210 10 3.0 3.0 4.60 8.5 1.0 20+ 1 1
36. R 100 ROG 89 2.0 31.5 38 29.3 4 41 0.93 306 90 3.0 1.0 4.70 8.3 0.3 14 3 3
37. E6 D7 SRS 89 2.5 20.3 25 16.5 2 33 0.76 202 80 1.0 1.0 4.60 7.8 0.3 14 3 3
38. E4 D5 SRS 89 3.5 20.3 29 17.3 3 32 0.91 234 90 3.0 2.0 4.15 8.5 0.3 14 3 3
39. E4 D1 SRS 89 3.5 27.5 39 22.8 7 41 0.95 314 80 2.0 1.0 4.10 8.0 0.3 12 3 3
40. E2 D1l SRS 89 2.0 20.5 27 17.0 6 36 0.75 218 80 2.0 3.0 4.40 7.8 0.5 16 2 2
41. 204x1359/64 FM 89 3.5 16.0 20 14.0 2 20 1.00 161 90 3.0 2.0 4.25 7.8 0.1 14 3 3
42. 225x222/64 FM 89 3.5 27.0 42 23.0 8 13 1.27 239 80 2.0 1.0 3.95 7.5 0.2 14 2 2
43. f 15/64 FM 89 3.0 27.5 36 22.0 7 32 1.12 290 90 3.0 2.0 4.05 7.8 0.1 14 3 3
44. f 30/64 FM 89 3.0 25.3 32 22.3 8 23 1.39 258 90 3.0 1.0 3.90 7.8 0.4 14 3 3
45. f 36/64 FM 92 4.0 22.0 25 17.0 0 26 0.96 202 80 3.0 1.0 4.30 9.5 0.6 18 2 2
46. f 45/64 FM 89 20.5 25 18.3 3 28 0.89 202 100 3.0 1.0 4.30 8.5 0.1 16 4 4
47. f 127/64 FM 89 3.0 25.0 30 21.5 6 27 1.11 242 90 2.0 3.0 4.05 8.5 0.4 16 2 2
48. f 128/64 FM 89 3.5 22.8 30 20.5 0 28 1.07 242 80 3.0 2.0 4.15 8.3 0.4 16 3 3
49. 1209x758/63 FM 89 2.5 16.8 19 15.0 0 21 0.90 153 90 1.0 2.0 4.30 8.8 0.4 16 3 3
50. 1161x1921/63 FM 89 3.5 06.8 11 65.0 0 7 0.16 89 90 3.0 2.0 4.20 7.8 0.3 14 4 4
51. E3106 FM 89 3.5 14.3 15 95.0 2 21 0.71 121 80 2.0 1.0 4.20 8.2 0.5 16 3 3
52. E3595 FM 89 2.5 30.0 34 28.8 0 35 0.97 274 90 3.0 2.0 4.50 9.3 0.1 16 3 3
53. E3596 FM 89 2.5 33.0 41 32.0 0 36 1.13 331 80 3.0 2.0 4.10 8.8 0.4 14 2 2
54. E3107E FM 89 3.0 27.0 35 26.0 1 36 0.97 282 90 3.0 1.0 4.30 9.2 0.4 14 3 3
55. E3107B FM 89 3.5 25.0 30 21.5 4 35 0.86 242 90 1.0 1.0 4.10 8.8 0.2 14 2 3
56. E3107D FM 89 3.0 24.5 34 23.3 3 33 1.03 274 90 1.0 1.0 4.15 8.8 0.2 14 2 3
57. E3107C FM 89 3.0 25.5 31 24.5 0 32 0.97 250 90 2.0 1.0 4.30 7.3 0.2 16 2 3







Table 2. (continued)
4-

m 4 ca 0 *
hf m m 0 M Q I -, 0
to f" t m5
S Ix t J ) % 0 F3
00 4J V F 4 V V


d)1 X i 3 8 1 1 |( % a + 10I

Varieties I Ii i I I 0 Ii 3 E
I__ _ _- I -


E3575
4206-3xH-3-B
LEF-2-Ax97-12A-C
118-8-CxH-3-B
822-3-AxH-3-B
222-6-AxH-3-B
Northern Belle 7L
Northern Belle
Gold cup
A.V. 100
R52474


69. 4206-3xK-A-B
70. Hybrid Seneca MK18
71. Seneca MKl00-White
silk
72. Seneca MK125-White
silk
73. Seneca MK125 Dark
silk


FM
3VBL
3VBL
3VBL
3VBL
3VBL
JH
JH
JH
RV
ROG
VBL
ROB
ROB

ROB


ROB 183


Exp.Hybrid Lat.2441 OG 72
Exp.Hybrid Lat.2466 O&G 69
Northern Belle JH 72
Northern Belle L JH 72
Northern Belle 45 JH 74
Golden Eagle JH 74
Exp. Hybrid 388-64Charter77
I I


4.0 23.8 28
5.0 20.8 24


4.5
4.5
4.0
3.5
2.0
3.0
3.5
4.0
3.0
2.0
3.5
4.5

2.0

3.0

3.0
4.0
4.5
4.5
4.5
4.5
5.0


24.3 40
25.8 33
21.5 35
-Pulled -


10.3
17.3
08.3
19.3
10.0
16.0
36.8
28.0

26.5

26.0

07.5
30.5
31.1
34.3
28.8
37.0
16.8


14
16
13
25
10
19
45
42

39

39

08
44
45
45
47
48
21


19.8 3
16.3 7
19.8 3
20.5 3
19.8 2
oo early
08.3 5
11.0 0
07.8 1
13.5 2
07.3 4
11.8 3
32.0 4
25.3 5


23.8

23.5

02.5
23.0
28.5
30.0
26.5
31.8
12.8


1.00
0.77
1.17
0.89
1.20

1.16
1.14
0.17
0.69
1.11
1.00
1.09
1.07

1.02

0.98

0.31
1.07
1.15
1.40
1.27
1.37
0.70


226
193
322
266
282

113
129
105
202
81
153
363
339

314

314

64
355
363
363
379
387
169


60
80

70
80

60
70
80
70
90
80

80

90

80

20
80
90
70
90
80
70


1.0
3.0
3.0
2.0
2.0

2.0
2.0
2.0
2.0
3.0
2.0
3.0
3.0

3.0

2.0

1.0
1.0
1.0
i2.0
2.0
2.0
1.0


2.0
1.0
3.0
1.0
2.0

2.0
3.0
3.0
2.0
3.0
1.0
2.0
3.0

3.0

2.1

1.0
1.0
3.0
3.0
2.0
3.0
3.0


4.50
4.20
4.05
4.10
3.95

4.00
3.95
4.20
4.05
4.30
4.10
4.45
4.20

4.20

4.20

3.60
4.80
4.00
4.50
4.25
4.25
4.10


8.5
8.0
7.5
8.5
7.8

7.8
7.0
7.8
7.8
7.8
7.8
8.8
7.8

7.5

7.5

6.8
8.3
7.3
7.5
7.8
7.8
8.0


1.0
0.3
0.3
1.0
0.3

1.0
0.8
1.0
0.4
0.2
0.2
0.3
0.3

0.2

0.3

0.3
0.3
0.2
0.6
0.2
0.3
0.6


16
12
10
12
12
12
14
16
12
12-14
14
16
16
14

10

16

16
16
16
14
16
14
14


- ~ I -


58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.




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