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首页> 外文期刊>Journal of Stored Products Research >Residual efficacy of synergized pyrethrin + methoprene aerosol against larvae of Tribolium castaneum and Tribolium confusum (Coleoptera: Tenebrionidae).
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Residual efficacy of synergized pyrethrin + methoprene aerosol against larvae of Tribolium castaneum and Tribolium confusum (Coleoptera: Tenebrionidae).

机译：增效除虫菊酯+甲基异戊二烯气雾剂对 Tribolium castaneum 和 Tribolium confusum 幼虫（鞘翅目：Tenebrionidae）的残留功效。

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Wheat flour and different packaging surfaces (cardboard, flour bag, muslin bag, paper bag, pallet wrap, plastic overwrap, polyethylene) were exposed to aerosol formulations of either 1% active ingredient (AI) pyrethrin (synergized with piperonyl butoxide)+ 33.6% (AI) methoprene or 3% (AI) pyrethrin + 33.6% AI methoprene. The mixture was formulated as specified on the insecticide labels to give a 100 to 1 ratio of active ingredient pyrethrin to methoprene. Residual bioassays were conducted every two weeks for 16 weeks post-exposure to the aerosol by placing four-week-old larvae of the red flour beetle, Tribolium castaneum (Herbst), or the confused flour beetle, Tribolium confusum (Jacqueline duVal), on treated flour or a treated packaging surface with untreated flour added. T. castaneum was clearly the more susceptible of the two species. Less than 2% of T. castaneum larvae exposed to aerosol-treated flour or packaging surfaces emerged as normal adults, regardless of the pyrethrin concentration. Most of the T. castaneum larvae on treated flour did not advance to the pupal stage because they were either developmentally arrested or died as larvae. They were able to develop further on the treated packaging surfaces, but still could not emerge as adults. T. confusum larvae exposed to aerosol-treated flour or packaging surfaces were able to develop to the pupal or adult stage. Emergence of normal-appearing adults from T. confusum larvae exposed on the packaging surfaces treated with 1% pyrethrin + methoprene gradually increased (range of 29.7 +or- 2.9 to 49.0 +or- 6.7%, depending on the surface), whereas adult emergence of larvae exposed to treated flour peaked at 10 weeks post-exposure. However, when T. confusum was exposed to 3% pyrethrin + methoprene treated flour or packaging surfaces, adult emergence was reduced. Overall there were few significant differences attributable to the individual packaging surfaces
机译：将小麦粉和不同包装表面（纸板，面粉袋，平纹细布袋，纸袋，托盘包装，塑料外包装，聚乙烯）暴露于含有1％活性成分（AI）除虫菊酯（与胡椒基丁醚协同作用）+ 33.6％的气溶胶配方中（AI）甲氧戊丁或3％（AI）菊酯+ 33.6％AI甲氧戊丁。按照杀虫剂标签上的说明配制混合物，以使活性成分除虫菊酯与甲基异戊二烯的比例为100：1。暴露后，每两周进行一次残留生物测定，持续16周，方法是将四周大的红色面粉甲虫 Tribolium castaneum （Herbst）或混淆的面粉甲虫< i> Tribolium confusum （Jacqueline duVal），在经过处理的面粉或经过处理的包装表面上添加未处理的面粉。 T。显然，锥栗是这两种物种中最易感的。少于T的2％。不论除虫菊酯的浓度如何，暴露于经气雾剂处理的面粉或包装表面的栗幼虫都是正常成年人。大多数 T。处理过的面粉上的栗ane幼虫没有发育到the期，因为它们要么发育上被捕，要么死为幼虫。它们能够在经过处理的包装表面上进一步发育，但仍然不能成年。 T。暴露于经气溶胶处理的面粉或包装表面的孔雀幼虫能够发育到the期或成年期。 T.T.正常出现的成年人在用1％的除虫菊酯+甲基异戊二烯处理过的包装表面上暴露的幼虫逐渐增加（范围从29.7±or- 2.9到49.0±6.7％，取决于表面），而暴露于处理过的幼虫的成年幼虫面粉在暴露后10周达到峰值。但是，当 T。将confusum 暴露于3％的除虫菊酯+甲基丁二烯处理过的面粉或包装表面，成人出苗率降低。总体而言，几乎没有明显的差异可归因于各个包装表面

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