Toxicity of Some Biopesticides to the Fall Webworm, Hyphantria cunea Durry (Lepidoptera: Arctidae)

Abstract

Three biopesticides, NeemAzal T/S (1% Azadirachtin), Laser (480 g/l Spinosad) and Delphin (32000 IU/mg Bacillus thuringiensis) were studied on the 3rd larval instal; of the fall webworm Hyphantria cunea Puny (Lepidoptera: Arctidae) under laboratory conditions. Different doses (NeemAzal: 600, 300, 150 and 75 ml, Laser: 60, 30, 15 and 7.5 g, Delphin: 200, 100, 50 and 25 g) were used in the study. Laboratory trials demonstrated that the three doses of NeemAzal T/S gave 69.4, 72.2 and 100% mortality, respectively and a Mortality period ranged between 1-7 days. Similar results were obtained in the other biopesticides. Highest doses of all the tested biopesticides gave 100 % mortality after 7 days.