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2022 Volume 1 Issue 1
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WU Keming, LI Baicheng, ZHOU Lin, et al. Joint Toxicity of Beauveria bassiana ZJU435 and Cyetpyrafen Against Panonychus citri[J]. PLANT HEALTH AND MEDICINE, 2022, (1): 84-89. doi: 10.13718/j.cnki.zwyx.2022.01.012
Citation: WU Keming, LI Baicheng, ZHOU Lin, et al. Joint Toxicity of Beauveria bassiana ZJU435 and Cyetpyrafen Against Panonychus citri[J]. PLANT HEALTH AND MEDICINE, 2022, (1): 84-89. doi: 10.13718/j.cnki.zwyx.2022.01.012
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Joint Toxicity of Beauveria bassiana ZJU435 and Cyetpyrafen Against Panonychus citri

  • 1. The Center for the Promotion of Modern Agricultural Development in the Bishan District of Chongqing, Chongqing 402760, China;

  • 2. Chongqing Gu Bai'ao Biological Research Institute Co., Ltd, Chongqing 402760, China;

  • 3. Chongqing Academy of Agricultural Sciences, Chongqing 401329, China;

  • 4. College of Life Science, Chongqing University, Chongqing 401331, China

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  • Received Date: 10/11/2021

  • MSC: S436.66

  • Panonychus citri is the importantpest/mite of citrus in China, which has developed resistance to many acaricides. Herein, joint toxicity of the microbial insecticide Beauveria bassiana ZJU435 and cyetpyrafen was evaluated by indoor and field tests. The indoor toxicity test results showed that 10 billion spores/mL of B. bassiana ZJU435 OD(Oil Dispersion) and 30% of cyetpyrafen SC(suspension concentrate) at a ratio of 10:1(V/V) presented the highest co-toxicity coefficient (CTC) of 249.90 and a remarkable synergistic effect.The results of field trial indicated that application of 10 billion spores/mL of B. bassiana ZJU435 (20 mL) OD and 30% of cyetpyrafen SC (2 mL), which were mixed in 15 L of water, produced a correction control effect of 84.41%, 90.02%, and 92.86% after treatment of 3,7,and 14 d, respectively, and had significantly better quick effect than B. bassiana ZJU435 (40 mL/15 L) application, but no significant difference with cyetpyrafen SC (4 mL/15 L) application. Thus, combined application of B. bassiana ZJU435 and cyetpyrafen at specific ratio produced excellent quick and endurance effects, and has potential use in practical production and treatment.
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Joint Toxicity of Beauveria bassiana ZJU435 and Cyetpyrafen Against Panonychus citri

  • Received Date: 10/11/2021

Abstract: Panonychus citri is the importantpest/mite of citrus in China, which has developed resistance to many acaricides. Herein, joint toxicity of the microbial insecticide Beauveria bassiana ZJU435 and cyetpyrafen was evaluated by indoor and field tests. The indoor toxicity test results showed that 10 billion spores/mL of B. bassiana ZJU435 OD(Oil Dispersion) and 30% of cyetpyrafen SC(suspension concentrate) at a ratio of 10:1(V/V) presented the highest co-toxicity coefficient (CTC) of 249.90 and a remarkable synergistic effect.The results of field trial indicated that application of 10 billion spores/mL of B. bassiana ZJU435 (20 mL) OD and 30% of cyetpyrafen SC (2 mL), which were mixed in 15 L of water, produced a correction control effect of 84.41%, 90.02%, and 92.86% after treatment of 3,7,and 14 d, respectively, and had significantly better quick effect than B. bassiana ZJU435 (40 mL/15 L) application, but no significant difference with cyetpyrafen SC (4 mL/15 L) application. Thus, combined application of B. bassiana ZJU435 and cyetpyrafen at specific ratio produced excellent quick and endurance effects, and has potential use in practical production and treatment.

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