Submitted to: Society of Nematology Meeting
Publication Type: Proceedings
Publication Acceptance Date: July 19, 1998
Publication Date: N/A
Leachate derived from roots of soybean (Glycine max) is known to stimulate egg hatch in soybean cyst nematode (SCN), Heterodera glycines Ichinohe. Experiments were conducted to determine SCN egg hatch with leachate obtained from Essex, a SCN susceptible cultivar, and Hartwig, a highly resistant cultivar. Approximately 100 SCN eggs were placed in a Petri plate in 10 ml water with or without leachate. Hatched eggs were counted each week for three weeks. Approximately 27% of the eggs hatched in water (control) in one week, whereas the egg hatch was 41.5% in leachate from Essex and 50.8% in leachate from Hartwig. By the end of three weeks, the egg hatch was significantly greater (76.4%) in leachate from Hartwig compared to 55.8% in leachate from Essex. The egg hatch in water (without leachate) was significantly lower than hatch in leachate from either cultivar. The data demonstrated that leachate from Hartwig stimulated SCN egg hatch more than the leachate from Essex. It is ironic that a soybean cultivar which is almost immune to H. glycines would stimulate egg hatch of this pest.