丁氟螨酯和捕食螨协同对二斑叶螨的田间防效

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中图分类号：S482.2 文献标识码：A文章编号：2097-1354（2025）06-0040-06

Abstract： In order to clarify the synergistic control effect of Cyfhimetofen with Neoseiulus californicus and Neoseiulus barkeri on Tetranychus urticae，the indoor virulence of Cyfhimetofen against T . urticae and predatory mites was determined by the film method，and the field control efficacy of Cyfhimetofen synergistically used with two predatory mites on T . urticae was evaluated. The results showed that the LC50 value of Cyfhimetofen against T . urticae was 12.16mg/L at 24h post treatment，while the LC50 value against the two predatory mites was more than 10 000mg/L ，which showed better safety to predatory mites. The results of the field control efficacy test showed that the control efficacy of Cyfhimetofen with N . californicus and Cyfhimetofen with N . barkeri on T . urticae at 7 d post treatment was 90.07% and 90.42% ，respectively，which was not significantly different from that of Cyfhimetofen alone， but was significantly higher than that of the predatory mites alone. At 14 d post treatment，the control efficacy of two synergistic treatment was increased to 94.97% and 91.72% ，respectively，which was significantly higher than that of Cyfhimetofen alone. Therefore，the synergistic control of T .urticae by Cyfhimetofen and the two predatory mites not only showed good quick effect， but also can significantly prolong the duration of efficacy. Among them，the effect of Cyfhimetofen with N californicus was the best for the control of two-spotted leaf mite.

Key words： Tetranychus urticae; Neoseiulus californicus ; Neoseiulus barkeri; Cyfhimetofen

二斑叶螨（Tetranychus urticae），隶属叶螨科（Tetranychidae）叶螨属（Tetranychus），是国内外重要的农业害螨[1]。（剩余6916字）