Topical and residual toxicity of six pesticides to <Emphasis Type="BoldItalic">Orius majusculus</Emphasis> |
| |
Authors: | Fatih Da?l? ?erife Ünal Bah?i |
| |
Institution: | (1) Plant Protection Department, Faculty of Agriculture, Akdeniz University, Antalya, Turkey |
| |
Abstract: | The toxicity of six pesticides (four insecticides and two fungicides) to Orius majusculus (Reuter) (Hemiptera: Anthocoridae) adults and nymphs was determined using different exposure methods. Mortality upon topical
exposure to abamectin, endosulfan and spinosad at recommended field doses ranged from 56% to 100% after 24 h. However, in
leaf residue tests, toxicity to both life stages decreased significantly, ranging from 0% to 33% mortality. Benomyl and copper
salts + mancozeb (fungicides) were much less toxic to O. majusculus, with less than 15% mortality of either adults or nymphs in topical and residue bioassays. In persistent toxicity tests,
insects were exposed to the same three insecticides for 4 days; mortality varied from 38% to 100%. Egg hatching was not significantly
affected when abamectin, endosulfan and spinosad were topically applied. Number of eggs laid per female in choice and no-choice
tests did not differ significantly from the control. The insecticides did not show considerable repellent effect in the choice
tests. Topical, residue and systemic uptake methods were also compared to determine the differences in the toxicity levels
of imidacloprid, a systemic insecticide. However, 100% mortality occurred with all methods. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|