2005 Annual Report: Effect of Crop Rotation on Soybean Cyst Nematode Egg Levels

Objective

Demonstrate the effect of crop rotation on reducing soybean cyst nematode levels.

Methods and Materials

Twenty-nine plots were established and cyst nematode egg counts are sampled each spring. The samples are point samples permanently marked in the plots. A composite sample of 10 cores per point sample is taken. Egg counts are run at MU's Nematology lab.

Results

A lot of variability exists from year to year in egg count numbers as shown in the accompanying table. This can be due to sampling error, growing season, and other factors such as rotations. In the long-term, it should give us trends on how long it may take for numbers to decrease using different strategies.