To assess the effects of rotation and soybean cultivar selection on soybean cyst nematode populations.
| Cooperator: | Beck Bros. |
| County of Site: | Henry |
| Nearest Town: | Napoleon |
| Major Soil Type: | Millgrove Loam (sandy) |
| Irrigation : | None |
| Tillage: | No-tillage |
| Previous Crop: | 1994 - Corn |
| Planting Date: | Soybeans 5/28/95 |
| Harvest Date: | Soybeans 10/12/95 |
A 3.1-acre site known to be infested with soybean cyst nematode was selected. In 1995, four soybean cyst nematode-resistant varieties (Asgrow 3134, Asgrow 3431, AgriPro 3460, Callahan 3377) and two susceptible varieties (Resnick, Asgrow 3237) were each replicated three times and randomly planted into the field. Individual plots were 15' x 500'. Soil samples were randomly collected at four-inch depths in each of the 18 plots. Samples were taken in June and September each year (1995 soybeans, 1996 corn, 1997 corn). Cyst counts were conducted by Dr. Paulette Pierson, Ohio State University Department of Plant Pathology, and reported as number of soybean cyst nematode eggs per 200 cc of soil.
| Average Number of Cyst Nematode Eggs/200 cc Soil | |||||||
|---|---|---|---|---|---|---|---|
| Soybean | Corn | Corn | |||||
| June 95 | Sept 95 | June 96 | Sept 96 | June 97 | Sept 97 | ||
| Asgrow 3134 - (R) | 2880 | 213 | 1427 | 373 | 1120 | 120 | |
| Resnick - (S) | 3813 | 9947 | 5093 | 2840 | 907 | 133 | |
| AgriPro 3460 - (R) | 3827 | 667 | 1467 | 1053 | 773 | 120 | |
| Asgrow 3431 - (R) | 2840 | 1840 | 1760 | 680 | 867 | 93 | |
| Callahan 3377 - (R) | 2560 | 533 | 1067 | 307 | 800 | 107 | |
| Asgrow 3237 - (S) | 3280 | 7840 | 3200 | 1613 | 813 | 427 | |
| LSD (0.05%) | 2877 | 3887 | 2764 | 1865 | 696 | 203 | |
| Average Susceptible | 3546 | 8893 | 4146 | 2226 | 860 | 280 | |
| Average Resistant | 3027 | 813 | 1430 | 603 | 890 | 110 | |
Soybean cyst nematode egg counts for susceptible varieties were significantly higher than resistant varieties at the end of the soybean growing season. At the end of the first year of corn, cyst counts after one susceptible variety (Resnick) were significantly higher than three resistant varieties. After two years of corn rotation, cyst counts decreased to non-critical levels for all varieties in the trial.
Submitted by:
Alan Sundermeier
Ohio State University Extension - Henry County
104 E. Washington Street, Suite 107
Napoleon, OH 43545
419-592-0806
sundermeier.5@osu.edu