Abstract
Souhrada, S.K., D.M. Volkers, and G.L. Tylka. 1995. Effects of selected greenhouse insecticides on Heterodera glycines reproduction. Journal of Nematology 27:519.
Three experiments were conducted to determine the effects of avermectin, dienochlor, endosulfan, fluvalinate, kinoprene, fatty acid potassium salts, and resmethrin insecticides, alone and in some dual combinations, on reproduction of Heterodera glycines. Distilled and tap water were control treatments. Susceptible soybean seedlings were transplanted into sand:soil mix, inoculated with H. glycines eggs, and incubated at 27 C. Treatments were sprayed on foliage and soil surfaces 4 to 8 days and 13 to 18 days after transplanting; a third application was made 22 days after transplanting in one experiment. Females were dislodged from soybean roots 28 days after transplanting and counted. Mean numbers of females ranged from 57 to 1,158 per root. Large differences in numbers of females were observed among experiments, but not among treatments within experiments. However, mean numbers of females on roots of plants treated with endosulfan, kinoprene, fatty acid potassium salts, and dual combinations of these three insecticides were greater (P <= 0.05) than those on roots of the control treatments in one experiment. None of these greenhouse insecticides adversely affected H. glycines reproduction.