James David G
Department of Entomology, Irrigated Agriculture Research and Extension Center, Washington State University, 24106 North Bunn Road, Prosser, WA 99350, USA.
Exp Appl Acarol. 2003;31(3-4):275-81. doi: 10.1023/b:appa.0000010383.33351.2f.
The toxicity of systemic and spray formulations of imidacloprid to Galendromus occidentalis Nesbitt, Neoseiulus fallacis Garman and Amblyseius andersoni (Chant) from hop yards in Washington State was evaluated in laboratory bioassays. The field rate of imidacloprid for hop aphids (0.13 g a.i. l) was highly toxic (100% mortality) to G. occidentalis and N. fallacis but less so (35.6% mortality) to A. andersoni. Half and quarter rates were also highly toxic to G. occidentalis and N. fallacis (79.5-100% mortality) but again had lower toxicity to A. andersoni (8.2-31.3% mortality). Systemic toxicity (via consumption of spider mite motiles feeding on leaf discs cut from imidacloprid-treated (0.13 g a.i. l) dwarf bean plants) was also high for G. occidentalis (98.3% mortality), as was toxicity from dried residues (93-98% mortality). Residual toxicity to N. fallacis was also high (89% mortality). The significance of these results for biological control of spider mites in hops and other crops is discussed.
通过实验室生物测定，评估了吡虫啉的全身制剂和喷雾制剂对华盛顿州啤酒花种植园中的西方盲走螨、伪钝绥螨和安德森钝绥螨的毒性。吡虫啉用于防治啤酒花蚜虫的田间用量（0.13克有效成分/升）对西方盲走螨和伪钝绥螨具有高毒性（死亡率100%），但对安德森钝绥螨的毒性较低（死亡率35.6%）。半量和四分之一用量对西方盲走螨和伪钝绥螨也具有高毒性（死亡率79.5 - 100%），但对安德森钝绥螨的毒性同样较低（死亡率8.2 - 31.3%）。全身毒性（通过取食从经吡虫啉处理（0.13克有效成分/升）的矮生菜豆植株上切下的叶盘上的活动叶螨）对西方盲走螨也很高（死亡率98.3%），干燥残留物的毒性也很高（死亡率93 - 98%）。对伪钝绥螨的残留毒性也很高（死亡率89%）。讨论了这些结果对啤酒花及其他作物中叶螨生物防治的意义。
