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2023 Volume 2 Issue 2
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JIANG Wenjie, LI Wei, ZHENG Jun, et al. Study on the Toxicity of Beauveria bassiana Combined with Tetraniliprole to Spodoptera frugiperda[J]. PLANT HEALTH AND MEDICINE, 2023, (2): 59-68. doi: 10.13718/j.cnki.zwyx.2023.02.009
Citation: JIANG Wenjie, LI Wei, ZHENG Jun, et al. Study on the Toxicity of Beauveria bassiana Combined with Tetraniliprole to Spodoptera frugiperda[J]. PLANT HEALTH AND MEDICINE, 2023, (2): 59-68. doi: 10.13718/j.cnki.zwyx.2023.02.009
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Study on the Toxicity of Beauveria bassiana Combined with Tetraniliprole to Spodoptera frugiperda

  • 1. Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400715, China;

  • 2. Agricultural Technology Extension Station of Fuling District, Chongqing 408000, China;

  • 3. Agricultural Technology Extension Center of Jiangjin District, Chongqing 402260, China;

  • 4. Plant Protection and Inspection Station of Dianjiang County, Chongqing 408300, China

More Information
  • Received Date: 26/03/2023

  • MSC: S435.132

  • In order to clarify the control effect of the combined application of tetraniliprole and Beauveria bassiana on the armyworm Spodoptera frugiperda， this study selected the B. bassiana Bb105 and the chemical Tetraniliprole， which are highly toxic to this pest， to carry out a toxicity study on the larvae of S. frugiperda by mixing them in different proportions and using them in different application order. The results of the study on the toxicity of different ratios of the B. bassiana and tetraniliprole to S. frugiperda showed that when the two were mixed at 9∶1 and 4∶1， the co-toxicity coefficients were 738.50 and 421.19， respectively， showing a synergistic effect， and the former had the most obvious synergistic effect. The toxicity test results of the two different order of uses on S. frugiperda showed that using B. bassiana for 72 hours before using tetraniliprole has a higher actual mortality rate than the predicted mortality rate， also showed a synergistic effect. The research results have laid a good theoretical foundation for the practical application of the combination of entomopathogenic fungi and chemical in the control of S. frugiperda.
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Study on the Toxicity of Beauveria bassiana Combined with Tetraniliprole to Spodoptera frugiperda

  • Received Date: 26/03/2023

Abstract: In order to clarify the control effect of the combined application of tetraniliprole and Beauveria bassiana on the armyworm Spodoptera frugiperda， this study selected the B. bassiana Bb105 and the chemical Tetraniliprole， which are highly toxic to this pest， to carry out a toxicity study on the larvae of S. frugiperda by mixing them in different proportions and using them in different application order. The results of the study on the toxicity of different ratios of the B. bassiana and tetraniliprole to S. frugiperda showed that when the two were mixed at 9∶1 and 4∶1， the co-toxicity coefficients were 738.50 and 421.19， respectively， showing a synergistic effect， and the former had the most obvious synergistic effect. The toxicity test results of the two different order of uses on S. frugiperda showed that using B. bassiana for 72 hours before using tetraniliprole has a higher actual mortality rate than the predicted mortality rate， also showed a synergistic effect. The research results have laid a good theoretical foundation for the practical application of the combination of entomopathogenic fungi and chemical in the control of S. frugiperda.

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