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Effect of temperature and grain type on the long-term persistence and efficacy of s-methoprene in controlling Rhyzopertha dominica

Authors

  • Lei Li,

    1. Laboratory of Insect Ecology, South China Agricultural University, China
    2. Environment and Plant Protection Institute, Chinese Academic of Tropical Agricultural Sciences, China
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  • Ling Zeng,

    1. Laboratory of Insect Ecology, South China Agricultural University, China
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  • Guangwen Liang

    Corresponding author
    1. Laboratory of Insect Ecology, South China Agricultural University, China
    • Correspondence to: Guangwen Liang, Laboratory of Insect Ecology, College of Natural Resources and Environment, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China. E-mail: gwliang@scau.edu.cn

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Abstract

BACKGROUND

The efficacy of methoprene can vary with surface substrates, application methods and environmental conditions. The objectives of the present study were to examine the effects of temperature and grain type on the long-term persistence and efficacy of methoprene in controlling Rhyzopertha dominica from Guangzhou, China.

RESULTS

Methoprene applied at 1 mg kg-1 caused >90% suppression of F1 adult progeny of R. dominica for 150–270 days. Temperature and grain type both influenced the long-term persistence of methoprene. Overall multivariate analysis of variance showed that the order of progeny reduction at different temperatures (°C) was: 24 > 28 > 32 > 36; the order of the progeny reduction on the different grains was: paddy > wheat and maize.

CONCLUSION

The results of our experiments show the maximum effect of methoprene for R. dominica control at 24 °C on paddy. © 2013 Society of Chemical Industry

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