Oakes Irrigation Research Site
Carrington Research Extension Center * North Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2189, FAX: (701) 742-2700, email: rgreenla@ndsuext.nodak.edu

 

'SUPERSWEET' SWEET CORN HYBRID PERFORMANCE TRIAL, 2001

Richard Greenland, Leonard Besemann and Delores Anderson


Results summary

Table 22. Corn development, ear height and ear removal score for sh2 sweet corn

Table 23. Number of ears per acre and yield of sh2 sweet corn

Table 24. Husk characteristics of sh2 sweet corn

Table 25. Ear characteristics of sh2 sweet corn


Sweet corn grows very well in this area of North Dakota. The short summer is compensated for by long days and lots of sunshine. Sweet corn always matures before frost.


MATERIALS AND METHODS


Soil:

Maddock sandy loam and Embden Loam; pH=7.4; 2.5% organic matter; soil-P and soil-K were very high; soil-S was very low.

Previous crops:

2000 - carrot; 1999 - pepper and field corn; 1998 - canola and edible bean.

Seedbed

preparation:

Disked May 16. Multiweeded (field cultivated) once on May 16 to smooth seed bed and incorporate fertilizer.

Planting:

Seeded on May 16 in 30-inch rows. Planting depth was about 3/4 inch. Plots were seeded at a rate of 50,000 seeds/acre, then later thinned to 28,000 plants/acre.

Plots:

Plots were 5 rows (12.5 ft) wide by 17 ft long. There were 4 reps.

Fertilizer:

On April 19, broadcast 10 lbs N/acre and 50 lbs P2O5/acre as 10-50-0 and 18 lbs N/acre and 20 lbs S/acre as 21-0-0-24. Sprayed 50 lbs N/acre as 28-0-0 on May 16. Knifed in 100 lbs N/acre as 28-0-0 + N-serve (1 qt/acre) on June 27.

Irrigation:

Overhead sprinkler irrigation as needed.

Pest Control:

Dual II (1.5 pt/acre on May 17) and Basagran + Attrex (1 pt/acre + .45 lb ai/acre) controlled weeds. Sprayed Dipel (2 lb/acre on July 2) to control European corn borer and corn earworm.

Harvest:

Hand harvested 23 to 25 days after half-silk date. Only the center row of each plot was harvested. Harvested from Aug 3 to Aug 13.

RESULTS


Most hybrids had good yield and quality. Saturn, Bicolor Saturn, BSS 1690 VP and Cronus were the best looking but Cronus was difficult to remove from the stalk. BSS 6284, BSS 1690 VP and GSS 5022 had the highest yields.


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Table 22. Corn development, ear height and ear removal score for sh2 sweet corn in the Oakes Irrigation Research Site 2001 supersweet sweet corn performance trial.

Hybrid

Seed source1

Early stand2

Days to half-silk

Days to harvest

Ear height3

Ear removal4

 

 

1000s/acre

 

 

inches

1 to 10

Bicolor Saturn

SW

42.5 ab5

65.0 de

86.0 ef

29.3 fg

6.6 c

BSS 1690 VP

RG

41.0 ab

64.3 d

84.3 d

34.0 cd

5.5 de

BSS 6284

RG

46.6 a

60.5 b

80.5 b

30.0 fg

7.0 bc

Cronus

RG

44.1 ab

64.3 d

84.3 d

31.0 ef

4.9 e

Eagle

## (RU)

29.3 c

66.5 f

86.9 f

33.4 cde

5.8 d

GSS 5022

RG

40.5 ab

59.0 a

79.0 a

24.0 h

5.6 d

GSS 0966

RG

41.3 ab

66.5 f

86.8 f

34.8 bc

7.4 b

Impulse

RG

42.3 ab

62.8 c

82.0 c

36.3 b

7.0 bc

Saturn

SW

38.2 b

65.0 de

86.0 ef

28.3 g

6.9 bc

Tethys

RG

46.4 a

65.5 e

85.5 e

32.3 de

5.6 d

Vail

RG

39.5 b

67.8 g

89.0 g

36.8 b

8.1 a

WSS 1921

RG

43.8 ab

68.5 g

89.0 g

39.8 a

7.0 bc

Probability

 

0.002

<.0001

<.0001

<.0001

<.0001

C.V. %

 

11

1

1

5

8

1See Appendix A for seed source codes.

2Corn was over planted. After stand count, corn was thinned to about 28,000 plants/acre (unless there were fewer than

  28,000 plants that emerged).

3Distance from ground to base of ear.

4Indicates ease of ear removal. The higher the score, the easier it was to remove the ear.

5Values in the same column followed by the same letter are not significantly different at the 0.05 level.


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Table 23. Number of ears per acre and yield of sh2 sweet corn in the Oakes Irrigation Research Site 2001 sh2 sweet corn performance trial.

Hybrid

Seed source1

Unhusked

Husked

marketable

total

marketable

total

ears

yield

ears

yield

ears

yield

ears

yield

 

 

1000s/A

tons/A

1000s/A

tons/A

1000s/A

tons/A

1000s/A

tons/A

Bicolor Saturn

SW

26.6

8.5 bc2

29.0

8.9 b-e

25.6 abc

5.7 abc

29.0

6.2 a-d

BSS 1690 VP

RG

27.9

9.5 ab

29.2

9.8 ab

26.6 ab

6.0 ab

29.2

6.4 ab

BSS 6284

RG

29.7

10.2 a

30.2

10.3 a

29.0 a

6.6 a

30.2

6.8 a

Cronus

RG

27.2

8.6 bc

28.4

8.8 b-e

26.4 ab

5.6 bcd

28.4

5.8 b-e

Eagle

## (RU)

23.0

7.9 c

24.4

8.1 cde

18.3 d

4.7 cd

24.4

5.8 b-e

GSS 5022

RG

26.6

8.9 abc

27.7

9.1 a-d

24.9 bc

5.9 ab

27.4

6.3 abc

GSS 0966

RG

24.9

7.8 c

26.6

8.1 cde

23.3 bc

4.8 cd

26.6

5.3 de

Impulse

RG

27.7

8.9 abc

29.0

9.1 abc

24.6 bc

5.3 bcd

29.0

5.8 b-e

Saturn

SW

26.9

8.6 bc

27.7

8.7 b-e

25.4 abc

5.7 a-d

27.7

6.0 a-d

Tethys

RG

25.6

8.5 bc

26.9

8.8 b-e

22.5 c

5.1 bcd

26.9

5.8 b-e

Vail

RG

25.1

7.7 c

25.9

7.7 de

23.3 bc

5.1 bcd

25.9

5.4 cde

WSS 1921

RG

26.9

7.7 c

27.2

7.7 e

24.3 bc

4.7 d

27.2

5.1 e

Probability

 

0.11

0.02

0.37

0.013

0.002

0.011

0.37

0.03

C.V. (%)

 

9

11

10

11

10

12

10

11

1See Appendix A for seed source codes.

2Values in the same column followed by the same letter are not significantly different at the 0.05 level. If no letters follow values in a column then there were no significant differences between values in that column.


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Table 24. Husk characteristics of sh2 sweet corn in the Oakes Irrigation Research Site 2001 sh2 sweet corn performance trial.

Hybrid

Seed source1

Husk color2

Distance husk over tip3

Husk tightness4

Percent short shank

Husk overall score

 

 

1 to 3

inches

1 to 3

%

1 to 10

Bicolor Saturn

SW

2.0

1.2 a5

2.5 ab

67.5 cde

7.0

BSS 1690 VP

RG

1.9

1.1 ab

1.6 f

93.8 a

7.3

BSS 6284

RG

1.8

1.1 ab

2.3 bc

57.5 e

7.0

Cronus

RG

1.9

0.9 abc

1.8 ef

63.8 de

6.6

Eagle

## (RU)

1.6

0.9 abc

2.0 cde

79.9 a-d

6.4

GSS 5022

RG

2.5

1.0 ab

2.1 cd

77.5 bcd

6.6

GSS 0966

RG

1.8

1.3 a

2.0 cde

77.5 bcd

6.5

Impulse

RG

2.0

1.0 ab

1.9 def

86.3 ab

6.9

Saturn

SW

2.0

1.2 a

2.8 a

77.5 bcd

7.5

Tethys

RG

2.0

0.5 c

1.9 def

70.0 cde

6.6

Vail

RG

1.9

0.7 bc

2.1 cd

71.3 b-e

6.9

WSS 1921

RG

2.0

0.7 bc

1.9 def

81.3 abc

6.5

Probability

 

0.10

0.02

<.0001

0.004

0.18

C.V. (%)

 

16

29

12

14

8

1See Appendix A for seed source codes.

2Color of husk. 1 to 3 is light to dark green.

3The distance the husk extends beyond the end of the ear.

4How tight husk is around ear. 1 = loose; 3 = tight.

5Values in the same column followed by the same letter are not significantly different at the 0.05 level. If no letters follow values in a column then there were no significant differences between values in that column.


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Table 25. Ear characteristics of sh2 sweet corn in the Oakes Irrigation Research Site 2001 sh2 sweet corn performance trial.

Hybrid

Seed source1

Ear length

Ear diameter

Average rows of kernels

Tip unfilled

Tip shape2

Kernel color

Kernel yellow intensity3

Ear overall score

 

 

-------- inches --------

 

inches

1 to 3

 

1 to 3

1 to 10

Bicolor Saturn

SW

7.8 abc4

1.75 bcd

14.0 bcd

0.0 a

1.6 a

bi

2.6 abc

8.0 ab

BSS 1690 VP

RG

8.2 a

1.73 bcd

14.0 bcd

0.5 bc

1.0 c

bi

2.9 ab

8.0 ab

BSS 6284

RG

8.2 a

1.80 ab

15.0 a-d

0.8 c

1.0 c

bi

2.1 cd

6.9 cd

Cronus

RG

7.6 bcd

1.64 d

13.0 d

0.2 ab

1.3 bc

y

3.0 a

8.0 ab

Eagle

## (RU)

8.1 a

1.80 ab

16.1 ab

0.4 abc

1.9 a

bi

2.4 a-d

7.3 bcd

GSS 5022

RG

8.2 a

1.72 bcd

13.5 cd

0.9 c

1.0 c

y

2.3 cd

7.0 cd

GSS 0966

RG

7.6 bcd

1.72 bcd

15.5 abc

0.0 a

1.8 a

y

2.1 cd

7.8 bc

Impulse

RG

7.4 cd

1.78 bc

14.5 a-d

0.5 bc

1.0 c

y

2.0 d

7.0 cd

Saturn

SW

7.4 d

1.90 a

15.0 a-d

0.0 a

1.8 a

y

2.5 a-d

8.8 a

Tethys

RG

7.9 ab

1.67 cd

14.0 bcd

0.1 ab

1.1 c

bi

2.4 bcd

7.5 bcd

Vail

RG

7.9 ab

1.65 d

16.0 ab

0.1 ab

1.5 ab

w

----

7.1 bcd

WSS 1921

RG

7.9 ab

1.64 d

16.5 a

0.4 abc

1.3 bc

w

----

6.8 d

Probability

 

0.001

0.002

0.03

0.001

<.0001

 

0.04

0.002

C.V. (%)

 

4

5

10

93

18

 

18

8

1See Appendix A for seed source codes.

2Tip shape: 1 is pointed; 2 is blunt; 3 is double or flat.

3Gives darkness of yellow kernels on ear. 1 = light yellow; 2 = medium yellow; 3 = dark yellow.

4Values in the same column followed by the same letter are not significantly different at the 0.05 level.


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