International Journal of Entomology Research

Authors
Onur Aker, Celal Tuncer

Abstract
The fall webworm, Hyphantria cunea (Lepidoptera: Arctiidae) is a dangerous and destructive pest for forest, fruit trees and ornamental plants. Insecticides are successful to reduce population of this pest, but they cause environmental pollution. In this study, the virulence efficacy of B. bassiana was determined on the fourth instar larvae of H. cunea under laboratory conditions. 1×10⁶ and 1×10⁸ conidial suspensions of B. bassiana grew at 20, 25 and 30°C temperatures. 1×10⁸ conidial suspensions of B. bassiana were the most efficacious in controlling larvae of H. cunea at spraying method, especially at 25°C with 100 % mortality after 9 days of treatment. 1×10⁸ conidial suspensions of B. bassiana more efficacious in controlling larvae of H. cunea at 20 and 30°C (61% and 74%) than 1×10⁶ conidial suspensions of B. bassiana at 20, 25 and 30°C (23%, 66% and 28%) after 9 days of treatment. This study showed that isolate of B. bassiana has virulent and highly potential for biological control on larvae of H. cunea.