Indoor toxicity of azadirachtin to <i>Spodoptera frugiperda</i> and its control effect in field

LIN Sukun; LIU Kaihong; WANG Ruifei; LIU Benju; ZHANG Yue; WU Jiyingzi; CHENG Dongmei; XU Hanhong; ZHANG Zhixiang

doi:10.7671/j.issn.1001-411X.201908012

Journal of South China Agricultural University > 2020 > 41(1): 22-27. > DOI: 10.7671/j.issn.1001-411X.201908012

LIN Sukun, LIU Kaihong, WANG Ruifei, et al. Indoor toxicity of azadirachtin to Spodoptera frugiperda and its control effect in field[J]. Journal of South China Agricultural University, 2020, 41(1): 22-27. DOI: 10.7671/j.issn.1001-411X.201908012

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Indoor toxicity of azadirachtin to Spodoptera frugiperda and its control effect in field

1.
Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China
2.
College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China

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Received Date: August 07, 2019
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
To evaluate the toxicity and control effect of azadirachtin to Spodoptera frugiperda and provide a technical reference for prevention and control of Spodoptera frugiperda.

Method
The toxicity and field control effect of azadirachtin on Spodoptera frugiperda were determined by soaking leaf method and spraying method.

Result
Under indoor condition, the LC₅₀ values of 2^nd and 3^rd instar larvae were 0.59 and 0.46 mg/L respectively, when treated with 0.3% azadirachtin EC after seven days; At seven days after treated with 40% azadirachtin dry powder, the LC₅₀ values of 2^nd and 3^rd instar larvae were 0.93 and 0.79 mg/L respectively; At three days after treated with 0.3% azadirachtin EC, the AFC₅₀ values of 2^nd and 3^rd instar larvae were 0.30 and 0.12 mg/L respectively; At three days after treated with 40% azadirachtin dry powder, the AFC₅₀ values of 2^nd and 3^rd instar larvae were 0.53 and 0.30 mg/L respectively. When 0.3% azadirachtin EC was diluted 500 times and sprayed on corn, the control effects on S. frugiperda reached 24.83%, 50.34% and 75.50% after 1, 3 and 7 days respectively.

Conclusion
Azadirachtin has good toxicity and antifeedant activity, and the control effect on S. frugiperda is better at seven days after treatment. Azadirachtin has a broad application prospect in controlling S. frugiperda.
- azadirachtin,
- Spodoptera frugiperda,
- larva,
- indoor toxicity,
- field efficacy

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References (23)

References

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