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 1998
Richard Greenland, Leonard Besemann, and Heidi Kerlin
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.
Table 27. Corn development, ear height and ear removal score.
Table 28. Number of ears per acre and yield of sweet corn.
Table 29. Ear characteristics of sh2 sweet corn.
Go to Oakes Irrigation Research Site Variety Performance
Trials
MATERIALS AND METHODS
| Soil: | Hecla sandy loam and Embden sandy loam; pH=7.0; 3.0% organic matter; soil-P was high; soil-K was very high; soil-S was very low. |
| Previous crops: |
1997 - pepper and tomato; 1996 - cabbage, lettuce, spinach, oriental vegetable, and tomato; 1995 - watermelon, muskmelon and soybean. |
| Seedbed preparation: |
Disked on 31 October 1997. Multiweeded (field cultivated) three times; once on May 1 for trash management, once on May 7 to incorporate fertilizer, and once shallow to break up the soil crust on May 13. |
| Planting: | Seeded on May 13 in 30-inch rows. Planting depth was about ¾ 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 13, broadcast 14 lbs N/acre and 70 lbs P2O5/acre as 10-50-0, 16 lbs N/acre and 19 lbs S/acre as 21-0-0-24, and 94 lbs K20/acre as 0-0-60. Sprayed 50 lbs N/acre as 28-0-0 on May 6. Knifed in 80 lbs N/acre as 28-0-0 on June 26. |
| Irrigation: | Surface drip irrigation as needed. |
| Pest Control: |
Dual + Bladex (1.5 pt/acre + 1.5 lb/acre applied on May 15) and hand weeding controlled weeds. Sprayed DiPel (1 lb/acre on June 29 and July 9) 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 July 30 to Aug 14. |
Yields and quality were high for almost all hybrids. HMX5377S had a very long shank on the ear that almost doubled the unhusked ear's length. NW5295 came off the plant very easily, but when we were hand husking, the ear had a tendency to break - the cob was very weak. The husks of NW5295 and Prime Plus didn't extend far enough over the ear and those hybrids had more worms in the ear tips than other hybrids.
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Table 27. Corn development, ear height and ear removal score for the Oakes Irrigation Research Site 1998 'supersweet' sweet corn performance trial.
| Hybrid | Seed source† | Early stand‡ | Days to half-silk | Days to harvest | Ear height§ | Ear removal¶ |
| 1000s/acre | inches | 1 to 10 | ||||
| BSS-1605 | NV | 33.8 | 63.5 | 85.5 | 29.5 | 4.9 |
| HM701 | HM | 31.0 | 63.5 | 83.0 | 24.8 | 4.4 |
| HMX5377S | HM | 32.3 | 68.0 | 93.0 | 28.0 | 4.5 |
| NW5295 | NV | 39.7 | 61.3 | 82.0 | 25.0 | 8.4 |
| Jumpstart | ST | 41.0 | 58.5 | 78.5 | 21.0 | 5.8 |
| Prime Plus | NV | 43.8 | 63.3 | 85.5 | 29.3 | 4.5 |
| Punchline | AS | 28.2 | 65.3 | 86.0 | 29.8 | 5.1 |
| Snowmass | RG | 26.1 | 65.8 | 86.0 | 26.0 | 5.3 |
| WSS 9720 | NV | 39.2 | 63.0 | 85.5 | 28.3 | 5.8 |
| LSD (0.05) | 6.8 | 0.6 | 0.5 | 3.1 | 1.1 | |
| C.V. (%) | 13 | 1 | 1 | 8 | 14 | |
†See appendix A for seed source codes.
‡Corn 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).
§Distance from ground to base of ear.
¶Indicates ease of ear removal. The higher the score, the easier it was to remove the ear.
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Table 28. Number of ears per acre and yield of sweet corn in the Oakes Irrigation Research Site 1998 'supersweet' sweet corn performance trial.
Hybrid |
Seed source† |
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 | ||
| BSS-1605 | NV | 33.6 | 11.6 | 39.7 | 12.7 | 31.0 | 6.8 | 39.7 | 7.7 |
HM701 |
HM | 29.7 | 13.0 | 36.6 | 14.4 | 22.5 | 6.3 | 36.6 | 8.3 |
HMX5377S |
HM | 20.8 | 10.0 | 29.5 | 12.1 | 19.0 | 5.4 | 29.2 | 6.7 |
NW5295 |
NV |
26.6 |
10.9 |
32.5 |
11.9 |
22.5 |
5.7 |
32.5 |
6.9 |
Jumpstart |
ST |
23.3 |
8.5 |
31.0 |
9.9 |
22.0 |
5.4 |
31.0 |
6.5 |
| Prime Plus | NV |
31.8 |
10.4 |
38.9 |
11.8 |
29.7 |
6.3 |
38.9 |
7.4 |
| Punchline | AS |
22.8 |
9.0 |
26.1 |
9.5 |
18.4 |
4.5 |
26.1 |
5.5 |
| Snowmass | RG |
27.2 |
10.8 |
33.8 |
12.1 |
22.3 |
4.9 |
33.8 |
6.2 |
| WSS 9720 | NV |
30.2 |
10.5 |
36.9 |
11.8 |
28.4 |
6.5 |
36.9 |
7.5 |
| LSD (0.05) | 4.7 |
1.6 |
5.8 |
1.8 |
3.9 |
0.9 |
5.8 |
1.0 |
|
| C.V. (%) | 12 |
10 |
12 |
10 |
11 |
11 |
12 |
10 |
|
†See appendix A for seed source codes.
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Table 29. Ear characteristics of sh2 sweet corn in the Oakes Irrigation Research Site 1998 'supersweet' sweet corn performance trial.
| Hybrid | Seed source† | Kernel color | Distance husk over tip‡ | Husk tight- ness§ | Husk Overall score | Ear length | Ear diameter | Rows of kernels | Tip shape¶ | Kernel yellow intensity†† | Ear overall score |
| inches | 1 to 3 | 1 to 10 | ----- inches ----- | ----- 1 to 3 ---- | 1 to 10 | ||||||
| BSS-1605 | NV | bi | 1.1 de | 2.3 | 6.5 | 7.7 | 1.61 | 16.5 | 2.0 | 1.8 | 7.3 |
| HM701 | HM | y | 1.2 cd | 2.0 | 6.5 | 8.8 | 1.87 | 18.5 | 2.0 | 2.0 | 6.9 |
| HMX5377S | HM | y | 2.4 a | 2.5 | 6.9 | 8.6 | 1.85 | 18.5 | 2.0 | 2.0 | 7.5 |
| NW5295 | NV | y | 0.2 f | 2.0 | 5.1 | 7.6 | 1.90 | 15.0 | 2.0 | 2.0 | 6.4 |
| Jumpstart | ST | bi | 1.7 bc | 2.0 | 7.0 | 8.1 | 1.77 | 14.0 | 1.8 | 2.0 | 7.3 |
| Prime Plus | NV | y | 0.6 ef | 2.3 | 6.4 | 8.0 | 1.69 | 16.0 | 2.0 | 1.8 | 6.8 |
| Punchline | AS | y | 2.1 ab | 2.8 | 7.1 | 7.9 | 1.83 | 18.0 | 2.0 | 2.0 | 7.8 |
| Snowmass | RG | w | 1.8 b | 2.8 | 7.4 | 7.8 | 1.76 | 17.5 | 2.0 | --- | 7.5 |
| WSS 9720 | NV | w | 1.6 bcd | 2.5 | 6.5 | 8.0 | 1.71 | 16.5 | 2.0 | --- | 7.4 |
| LSD (0.05) | ‡‡ | 0.6 | 0.9 | 0.5 | 0.10 | 2.6 | NS | NS | 0.6 | ||
| C.V. (%) | 29 | 16 | 9 | 4 | 4 | 10 | 8 | 8 | 6 | ||
†See appendix A for seed source codes.
‡The distance the husk extends beyond the end of the ear.
§How tight husk is around ear. 1 = loose; 3 = tight.
¶Tip shape: 1 is pointed; 2 is blunt; 3 is double or flat.
††Gives darkness of yellow kernels on ear. 1 = light yellow; 2 = medium yellow; 3 = dark yellow.
‡‡Values in this column followed by the same letter are not significantly different at the 0.05 level.
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Go to Oakes Irrigation Research Site Variety Performance Trials
Go to Oakes Irrigation Research Site 1998 annual report