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Effects of direct or indirect treatment with insecticides on adult tea leafroller, Caloptilia theivora (Lepidoptera: Gracillariidae), and its progeny

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Abstract

We investigated the effects of the direct and indirect application of insecticides on adults and progenies of the tea leafroller, Caloptilia theivora (Walsingham) (Lepidoptera: Gracillariidae), a serious pest of tea plants (Camellia sinensis (L.) Kuntze). Chlorantraniliprole, cyantraniliprole, and spinetoram showed low median lethal dose (LD50) values with topical application, indicating a strong adult killing effect when in contact with the insecticides. The latter two insecticides reduced the number of eggs laid even at low concentrations, but did not affect the survival of adults. Chlorantraniliprole, cyantraniliprole, flubendiamide, spinetoram, spinosad, abamectin, emamectin benzoate, Saburina® FL, and decanoyloctanoylglycerol adhering to the tea leaves and rearing containers inhibited the mating of virgin adults and suppressed oviposition by mated females. Therefore, the abovementioned insecticides were determined to be effective in controlling the tea leafroller.

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Acknowledgements

We thank the staff of the Kagoshima Prefectural Institute for Agricultural Development, Tea Division for their support. This study was supported by a grant from the NARO Bio-oriented Technology Research Advancement Institution (the special scheme project on regional development strategy) and the Science and Technology Research Promotion Program for Agriculture, Forestry, Fisheries and Food Industry (27019C).

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Correspondence to Takeshi Kamimuro.

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Kamimuro, T., Higashitarumizu, S., Fukuda, T. et al. Effects of direct or indirect treatment with insecticides on adult tea leafroller, Caloptilia theivora (Lepidoptera: Gracillariidae), and its progeny. Appl Entomol Zool 54, 377–387 (2019). https://doi.org/10.1007/s13355-019-00634-0

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  • DOI: https://doi.org/10.1007/s13355-019-00634-0

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