Joshi Neelendra K, Phan Ngoc T, Biddinger David J
Department of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USA.
Fruit Research & Extension Center, Entomology, Pennsylvania State University, 290 University Dr., Biglerville, PA 17307, USA.
Insects. 2023 Feb 24;14(3):228. doi: 10.3390/insects14030228.
(Koch) (Acari: Tetranychidae), commonly known as European red mite, is a polyphagous pest of various tree and small fruit crops, including apples. A field study was conducted to evaluate different pesticide options available for the management of , and their impact on the population of non-target predatory mite species complex consisting of , , and in apple orchards. Pesticides were applied using a commercial airblast sprayer at the 3-5 mite/leaf recommended economic Integrated Pest Management (IPM) threshold or prophylactically in the spring ignoring IPM practices such as monitoring, reliance on biological control and economic thresholds. Effects on the motile and egg stages of were evaluated as were effects on the populations of predatory mites through frequent leaf counts during the season. We also recorded the subsequent overwintering eggs of from each pesticide treatment. The two prophylactic treatments containing a mixture of zeta-cypermethrin + avermectin B1 + 1% horticultural oil and abamectin + 1% horticultural oil provided effective control of population throughout the season without reducing predatory mite populations. In contrast, eight treatments applied at the recommended economic threshold of 3-5 mites/leaf were not effective in suppressing populations and most reduced predatory mites. Etoxazole had significantly higher number of overwintering eggs compared to all other treatments.
果苔螨（Koch）（蜱螨亚纲：叶螨科），俗称欧洲红螨，是包括苹果在内的各种乔木和小果类作物的多食性害虫。开展了一项田间研究，以评估可用于防治果苔螨的不同农药选项，以及它们对苹果园中由智利小植绥螨、西方盲走螨和加州新小绥螨组成的非靶标捕食性螨类种群的影响。使用商用鼓风喷雾器，在每叶3 - 5头螨的推荐经济综合虫害管理（IPM）阈值下或在春季预防性地施用农药，而忽略诸如监测、依赖生物防治和经济阈值等IPM措施。评估了对果苔螨活动期和卵期的影响，以及通过在季节中频繁进行叶片计数对捕食性螨类种群的影响。我们还记录了每种农药处理后果苔螨的越冬卵情况。两种含有高效氯氰菊酯+阿维菌素B1 + 1%园艺油混合物以及阿维菌素+ 1%园艺油的预防性处理，在整个季节都能有效控制果苔螨种群，且不会减少捕食性螨类种群。相比之下，在每叶3 - 5头螨的推荐经济阈值下施用的8种处理，在抑制果苔螨种群方面无效，且大多数处理减少了捕食性螨类数量。与所有其他处理相比，乙螨唑的越冬果苔螨卵数量显著更多。
