联合应用智利小植绥螨与丁氟螨酯防治草莓二斑叶螨

本文研究了新型杀螨剂丁氟螨酯对叶螨天敌智利小植绥螨的毒性、对智利小植绥螨繁殖的影响以及两者联合应用对草莓二斑叶螨的防治效果。结果表明，丁氟螨酯对智利小植绥螨的毒性很低，即使在400 mg/L的高浓度下，智利小植绥螨的死亡率仍然低于35%，对雌、雄成螨的LC₅₀分别为669.4 mg/L和456.4 mg/L。施用丁氟螨酯后，丁氟螨酯对智利小植绥螨成螨存活率影响无显著差异。田间试验表明单独使用智利小植绥螨和联合使用智利小植绥螨与丁氟螨酯，两周内对草莓二斑叶螨的防治效果都在90%以上，明显好于单独使用丁氟螨酯。相比于单独使用智利小植绥螨的生物防治区，联合防治区的防治效果更好，28 d时仍高于95%。因此，智利小植绥螨与丁氟螨酯联合应用防治草莓叶螨效果更佳。

Integrating Phytoseiulus persimilis and Cyflumetofenin for Control of Tetrangchus urticae on Strawberry

In the present study, we investigated the toxicity of cyflumetofen, a new type of miticide, on Phytoseiulus persimilis, an important natural enemy of spider mites, the impact of cyflumetofen on reproduction of P. persimilis, and the potential of integrating the miticide and the predator in strawberry spider mite control. Our results showed that cyflumetofen is low toxic to P. persimilis, with<35% mortality observed at the highest tested concentration (400 mg/L) and LC₅₀ to female and male adults of 669.4mg/L and 456.4 g/L, respectively. No significant impact of cyflumetofen on 7-day fecundity of P. persimilis was observed. In the field experiment, control efficiency of spider mites maintained at ≥ 90% for two weeks in the treatments with P. persimilis release alone or integrated application of the predators and the miticide. Integrated application showed higher potential than use the miticide alone, with >95% control efficiency at 28 days after application. Integrated application of the predator and the miticide can be recommended for spider mite management in greenhouse strawberries.