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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (1): 139-143.doi: 10.11924/j.issn.1000-6850.casb18100055

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Toxicity Test and Field Efficacy of Four Pesticides to Tetranychus urticae Koch

Zhang Xiuxia, Chen Xin, Mao Xiaohong, Li Jiaojiao, Zhang Ansheng()   

  1. Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100
  • Received:2018-10-17 Revised:2018-12-28 Online:2020-01-05 Published:2020-01-07
  • Contact: Zhang Ansheng E-mail:zhangansheng2003@163.com

Abstract:

The laboratory toxicity of ivermectin and other three pesticides to female adult mites of Tetranychus urticae was determined by slide impregnation method, and the field control efficacy test was carried out. The results of indoor toxicity test showed that the toxicity of these four insecticides against Tetranychus urticae was ranked as follows: ivermectin> fenpropathrin>beta-cyhalothrin>spironoethyl ester, and ivermectin exhibited the highest indoor toxicity to Tetranychus urticae with LC50 value of 0.01 mg/L. The results of field experiment showed that the control effect of 0.5% ivermectin EC at 9 and 18 g/hm 2 dosage were more than 90% at 3, 7 and 10 days after the treatment, and it could be used as the first choice to control female adult mites.

Key words: insecticides, Tetranychus urticae Koch, indoor toxicity, field efficacy

CLC Number: