Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (5): 1281-1285.DOI: 10.16178/j.issn.0528-9017.20250140

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Control efficacy of Amblyseius cucumeris on Tetranychus urticae Koch in pear orchards

ZHU Chenhui1(), JIA Huaizhi1, LU Qiang2, YAO Zhangliang2, XU Weidong2()   

  1. 1.Fruit Tree and Sericulture Technology Extension Station,Xiuzhou District,Jiaxing City,Jiaxing 314100,Zhejiang
    2.Jiaxing Academy of Agricultural Sciences,Jiaxing 314016,Zhejiang
  • Received:2025-02-27 Online:2026-05-11 Published:2026-05-12
  • Contact: XU Weidong

Abstract:

This study investigated the control efficacy of Amblyseius cucumeris and chemical acaricides with different release frequencies and dosages against Tetranychus urticae Koch in pear orchards. The results demonstrated that Amblyseius cucumeris exhibited lower immediate control efficacy compared with chemical acaricides but demonstrated superior persistence. The 30-day control efficacy after two releases of Amblyseius cucumeris was superior to that of single releases of Amblyseius cucumeris and chemical acaricides. Under single-release conditions,the treatment with 2.250 million heads per hectare showed significantly (p<0.05) higher control efficacy at 15 and 30 days post-release compared to 1.125 million heads per hectare. When released twice,the combination of the first 2.250 million heads per hectare and the second 1.125 million heads per hectare showed no significant difference in control efficacy compared to both releases of 1.125 million heads per hectare. The experimental results indicated that staged release of Amblyseius cucumeriss combined with appropriate dosages demonstrated good efficacy in long-term control against Tetranychus urticae Koch in pear orchards,outperforming conventional chemical acaricides and showing promising application prospects.

Key words: Amblyseius cucumeris, Tetranychus urticae Koch, etoxazole, control efficacy, pear orchard

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