Holt Kiffnie M, Opit George P, Nechols James R, Margolies David C
Department of Entomology, Kansas State University, 123 West Waters Hall, Manhattan, KS 66506, USA.
Exp Appl Acarol. 2006;38(2-3):141-9. doi: 10.1007/s10493-006-0018-y.
The compatibility of the selective insecticide spinosad (Conserve SC), at rates recommended for thrips control in greenhouses, with release of the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) to control spider mites, was investigated in a crop of ivy geranium Pelargonium peltatum, cultivar 'Amethyst 96.' Plants were inoculated with twospotted spider mites, Tetranychus urticae Koch (Acari: Tetranychidae), 2 weeks before treatments were applied. There were three treatment variables, each at two levels: predators (released or not), spray application (water or Conserve SC at 2 ml/3.79 l), and timing of spray (1 day before or after predators were released). Twospotted spider mite populations then were sampled twice each week over a three-week period. The application or timing of spinosad had no effect on the ability of the predator to reduce the population of spider mites. Spider mite populations in the no-predator treatment continued to expand over the course of the experiment, while those in the predator-release treatment declined. We conclude that P. persimilis can be used in conjunction with spinosad on ivy geraniums without causing obvious detrimental effects to this predator or leading to a reduction in biological control.
在常春藤天竺葵（品种‘紫水晶96’）作物中，研究了用于温室蓟马防治的推荐剂量的选择性杀虫剂多杀菌素（Conserve SC），与释放捕食螨智利小植绥螨（Athias-Henriot）（蜱螨亚纲：植绥螨科）以控制叶螨的兼容性。在施药前两周，用二斑叶螨（Koch）（蜱螨亚纲：叶螨科）对植株进行接种。有三个处理变量，每个变量有两个水平：捕食螨（释放或不释放）、喷雾施用（水或2毫升/3.79升的Conserve SC）以及喷雾时间（在释放捕食螨前1天或后1天）。然后在三周时间内每周对二斑叶螨种群进行两次采样。多杀菌素的施用或施用时间对捕食螨减少叶螨种群数量的能力没有影响。在无捕食螨处理中，叶螨种群在实验过程中持续增长，而在释放捕食螨处理中，叶螨种群数量下降。我们得出结论，智利小植绥螨可以与多杀菌素一起用于常春藤天竺葵，而不会对这种捕食螨造成明显的有害影响，也不会导致生物防治效果降低。
