Susceptibility to Selected Insecticides and Risk Assessment in the Insect Egg Parasitoid Trichogramma confusum (Hymenoptera: Trichogrammatidae)
Authors: Wang, Yanhua; Chen, Liping; An, Xuehua; Jiang, Jinhua; Wang, Qiang; Cai, Leiming; Zhao, Xueping
Source: Journal of Economic Entomology, Volume 106, Number 1, Pages 1-523 , pp. 142-149(8)
Publisher: Entomological Society of America
Abstract:The parasitoid Trichogramma confusum Viggiani (Hymenoptera: Trichogrammatidae) is an important natural enemy of many lepidopterans throughout the world. Extensive toxicological tests have clarified the toxic effects of insecticides on trichogrammatids, but only few studies have examined these effects on T. confusum. Among the seven classes of tested chemicals, organophosphates and carbamates exhibited the highest intrinsic toxicity to the parasitoid with LC50 values ranging from 0.037 (0.030‐0.046) to 0.29 (0.23‐0.38) and from 0.17 (0.15‐0.19) to 1.61 (1.45‐1.79) mg AI L−1, respectively. They were followed by phenylpyrazoles, avermectins, pyrethroids, and neonicotinoids, which induced variable toxicity responses with LC50 values ranging from 0.63 to 45.26, 1.06‐21.73, 3.89‐19.36, and 0.24‐754.2 mg AI L−1, respectively. In contrast, insect growth regulators (IGRs) showed the least toxicity to the parasitoid with LC50 values ranging from 3,907 (3,432‐4,531) to 10,154 (8,857‐12,143) mg AI L−1. A risk quotient analysis indicated that neonicotinoids (except thiamethoxam), avermectins, pyrethroids, IGRs, and phenylpyrazoles are safe, but organophosphates and carbamates are slightly to moderately or dangerously toxic to T. confusum. This study provides informative data for implementing both biological and chemical control strategies in integrated pest management of lepidopterans.
Document Type: Research Article
Publication date: 2013-02-01
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
- Editorial Board
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Visit this journal's homepage
- ingentaconnect is not responsible for the content or availability of external websites