Abstract
The influence of winter wheat (Triticum aestivum) cover crop vs. winter fallow and of soybean (Glycine max) planting date on the populations dynamics of soybean cyst nematode (Heterodera glycines) (SCN) was determined during a 2-yr period. Numbers of SCN cysts, eggs, and second-stage juveniles were unaffected by wheat as opposed to winter fallow. Delay in soybean planting associated with double-cropping wheat, however, allowed for a significant decline in the numbers of SCN between early May and late June. Midseason densities of early May soybean plantings were greater than those of mid-June to late June plantings (.)
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