Abstract
Tylka, G.L., D. H. Soh, and J. R. Coats. 1997. Glucosinolate breakdown products for management of Heterodera glycines. Journal of Nematology 29: (in press).
Glucosinolates are secondary plant metabolites, a few of which are known to be insecticidal and/or nematicidal. Research was conducted to determine whether glucosinolate breakdown products, or aglycones, could be developed as nematicides for the soybean cyst nematode, Heterodera glycines. In vitro hatching of free H. glycines eggs in 10 and 100 mg/ml cyanohydroxypropene and cyanohydroxypropene propionate ranged from 0.4% to 4.6% of that in deionized water after 24 days. Hatching did not increase when eggs were transferred from glucosinolate breakdown products to deionized water or 3 mM zinc sulfate after 24 days; the H. glycines egg hatching was irreversibly inhibited or the eggs were no longer viable. In another experiment, hatching of H. glycines eggs in deionized water was inhibited by 79.4% after 12 days by volatiles from 100 mg/ml cyanohydroxypropene solution. These glucosinolate breakdown products may be useful as soil fumigants for management of H. glycines if hatching, particularly that of encysted eggs, is irreversibly inhibited by volatiles from the compounds.