Evaluation of the Control Effect of Bt-G033A Mixed with 3 Insect Growth Regulators on Tuta absoluta Meyrick

doi:10.16409/j.cnki.2095-039x.2024.02.043

Abstract

Abstract: In order to improve the efficiency of the use of biological agents and reduce the use of chemical pesticides, 50000 IU/mg Bt-G033A (WP) was combined with 30% cyromazine SC, 25% chlorbenzuron SC and 20% tebufenozide SC to control Tuta absoluta Meyrick, respectively. The treatments of Bt-G033A:cyromazine 75:25, Bt-G033A:chlorbenzuron 25:75 and 50:50 showed synergistic control effects on T. absoluta Meyrick, and the treatments of Bt-G033A:cyromazine 25:75 and 50:50, Bt-G033A:tebufenozide 75:25, Bt-G033A:chlorbenzuron 75:25 showed additive control effects on T. absoluta Meyrick by co-toxicity factor method, respectively. The co-toxicity coefficient of Bt-G033A combined with cyromazine against T. absoluta Meyrick was 83.75 showing additive effect, and the co-toxicity coefficient of Bt-G033A combined chlorbenzuron against T. absoluta Meyrick was 131.76 showing synergistic effect. The field trials showed that control effect of Bt-G033A:chlorbenzuron 50:50 agent was 64.76%～89.12% in 3～21 d, which was significantly higher than that of chlorbenzuron and Bt-G033A single agent.

Key words: Tuta absoluta, insect growth regulator, co-toxicity factor, co-toxicity coefficient

CLC Number:

S476

ABULIZI·Tayier, PATIMA·Wumuerhan, MA Zhao, WANG Huiqing, LU Yi, FU Wenjun, LIU Fei, BUAYIXIAMU·Wusiman, MA Deying. Evaluation of the Control Effect of Bt-G033A Mixed with 3 Insect Growth Regulators on Tuta absoluta Meyrick[J]. Chinese Journal of Biological Control, 2024, 40(4): 770-775.

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