Evaluation of Insecticidal Activity of Pesticides Against Hemipteran Pests on Apple Orchard

Abstract

Stink bugs do damage on various crops including upland crops and tree fruits. Especially, yellowbrown stink bug (Halyomorpha halys (Stål)) and brown-winged green (Plautia stali) are severely damaged on apple orchard. Using seven insecticides -dinotefuran WP, etofenprox WP, chlorpyrifos WP, cabaryl WP, chlothianidin SC, flonicamid WG, and bifenthrin WG -registered on apple, contact and residual toxicities were tested on both male and female of P. stali and H. halys that preferred apple fruit. Contact toxicity of dinotefuran WP was excellent on male P. stali 48 hours after treatment (HAT) with 96.7% and significant on male Halyomorpha halys 48 HAT with 74.5% but the others had low effect. Contact toxicity on these stink bugs were higher in male than female. All insecticides except flonicamid, residual effects were all effective on both male and female of P. stali, while chlorpyrifos and bifenthrin were showed higher residual toxicity on both male and female of H. halys in laboratory condition. Two insecticides, chlorpyrifos and bifenthrin, were selected for the field test. Bifenthrin have a high residual effect on P. stali until 5 days after treatment, but have a low residual toxicity on H. halys in the field test. Chlorpyrifos showed higher residual toxicity in the laboratory, however, showed low residual efficacy on two species stink bug onto the field.

Feeding Behavior Comparison of Bean Bugs, Riptortus pedestris and Halyomorpha halys on Different Soybean Cultivars

“…Conventional broad-spectrum insecticides are widely used to control bugs [19][20][21]. However, in practical terms, managing bugs is difficult because of their high mobility and insecticide-avoidance behavior [22].…”