Toxicity and Field Efficacy of Tetraniliprole Against Spodoptera frugiperda

doi:10.11924/j.issn.1000-6850.casb2022-0160

Abstract

Abstract:

To determine the feasibility and appropriate dosage of tetraniliprole for the control of Spodoptera frugiperda, egg immersion and leaf dipping methods were performed to explore the toxicity of 200 g/L tetraniliprole SC to eggs and 2nd instar larvae of S. frugiperda, and the control efficacy test was carried out in field. The laboratory toxicity showed that the LC₅₀ of 200 g/L tetraniliprole SC to the eggs and the 2nd instar larvae was 187.423 and 0.023 mg/L, respectively, indicating its poor toxicity to the eggs and much higher toxicity to the 2nd instar larvae than that of 200 g/L chlorantraniliprole SC. In the two-year field experiment, the control efficacy of 200 g/L tetraniliprole SC was 43.26%-59.37% with ingredient dosage of 15-45 g/hm² at 1 day after treatment (DAT), and the control efficacy increased to 80.28%-91.94% after 7 DAT. Moreover, the control efficacy of 45 g/hm²treatment was still above 80% at 10 DAT. The 200 g/L tetraniliprole SC had good indoor toxicity to the 2nd instar larvae of S. frugiperda, its field control efficacy was similar to that of 200 g/L chlorantraniliprole SC and 5% emamectin enzoate ME, and it could be used as a potential agent for the control of S. frugiperda.

Key words: tetraniliprole, Spodoptera frugiperda, egg, larvae, toxicity, field efficacy

CHI Yanyan, LIN Shaoyuan, CHEN Bingxu, XU Shu. Toxicity and Field Efficacy of Tetraniliprole Against Spodoptera frugiperda[J]. Chinese Agricultural Science Bulletin, 2023, 39(7): 111-115.

Figures/Tables 2

References 24

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药剂	LC₅₀/(mg/L)	95%置信区间/(mg/L)	回归方程	相关系数
200 g/L四唑虫酰胺悬浮剂	187.423	154.786~225.615	Y=0.424+2.013X	0.999
200 g/L氯虫苯甲酰胺悬浮剂	113.595	92.914~140.723	Y=1.285+1.807X	0.998
5%甲维盐微乳剂	17.616	14.346~21.365	Y=2.633+1.901X	0.996

药剂	LC₅₀/(mg/L)	95%置信区间/(mg/L)	回归方程	相关系数
200 g/L四唑虫酰胺悬浮剂	187.423	154.786~225.615	Y=0.424+2.013X	0.999
200 g/L氯虫苯甲酰胺悬浮剂	113.595	92.914~140.723	Y=1.285+1.807X	0.998
5%甲维盐微乳剂	17.616	14.346~21.365	Y=2.633+1.901X	0.996

药剂	LC₅₀/(mg/L)	95%置信区间/(mg/L)	回归方程	相关系数
200 g/L四唑虫酰胺悬浮剂	0.023	0.019~0.031	Y=7.367+1.453X	0.998
200 g/L氯虫苯甲酰胺悬浮剂	0.471	0.375~0.588	Y=5.533+1.630X	0.996
5%甲维盐微乳剂	0.010	0.008~0.013	Y=8.000+1.504X	0.998

药剂	LC₅₀/(mg/L)	95%置信区间/(mg/L)	回归方程	相关系数
200 g/L四唑虫酰胺悬浮剂	0.023	0.019~0.031	Y=7.367+1.453X	0.998
200 g/L氯虫苯甲酰胺悬浮剂	0.471	0.375~0.588	Y=5.533+1.630X	0.996
5%甲维盐微乳剂	0.010	0.008~0.013	Y=8.000+1.504X	0.998