A Mechanistic Approach To Assessing the Potential for Cover Crops To Serve as Trap Crops for the Soybean Cyst Nematode

The effects of cover crops on the biology soybean cyst nematode (SCN; Heterodera glycines) are not well established. It is possible that may reduce SCN population densities by acting as trap crops. Cover with potential to serve stimulate hatching and/or attract hatched juveniles and also be penetrated large numbers nematodes cannot feed. Experiments were conducted determine whether root exudates (REs) soil leachates (SLs) from various crop plants affected chemotaxis if there significant differences in juvenile penetration among different plant types. In 14-day-long experiments, was greater crimson clover (Trifolium incarnatum) REs SLs than all other treatments experiments. No significantly hatching. attracted annual ryegrass (Lolium multiflorum) cereal rye (Secale cereale) after 24 h. greenhouse more roots single cultivars clover, mustard (Brassica juncea), rapeseed (B. napus) 11 species/cultivars evaluated experiment over course 20 days. Few rye. results suggest grown a crop, has most act for SCN. affect ways mechanisms investigated these