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Transmission of capsicum chlorosis virus by Thrips palmi (Thysanoptera: Thripidae)

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Abstract

Transmission efficiencies of capsicum chlorosis virus (CaCV) were investigated for four thrips species (Thysanoptera: Thripidae), Frankliniella occidentalis (Pergande), Frankliniella intonsa (Trybom), Thrips palmi (Karny), and Thrips tabaci Lindeman infesting green pepper in Japan. The first-instar larvae of the thrips were allowed to feed on CaCV-infected green pepper leaves for 24 h. The transmission of CaCV by thrips was examined using a petunia leaf disk assay. CaCV was transmitted by four male (8.70%) and four female (3.88%) T. palmi, but the virus was not transmitted by adults of any other species. In a second transmission assay, 10 adult T. palmi that had fed on infected leaves as larvae were released to healthy green pepper seedlings. After 21 days, the seedlings were examined and 50% of them showed symptoms of CaCV infection. RT-PCR confirmed that they were infected with the virus. The viruliferous rate of adult T. palmi was 60%, while CaCV was not detected in adults of the other three species. These results suggest that T. palmi is capable of being a new vector of CaCV.

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Acknowledgements

This work was supported by Cabinet Office, Government of Japan, Cross-ministerial Strategic Innovation Promotion Program (SIP), “Technologies for creating next-generation agriculture, forestry and fishers” (funding agency: Bio-oriented Technology Research Advancement Institution, NARO). We would like to thank Dr. Shuichi Yamasaki (Oita Prefectural Agriculture, Forestry and Fisheries Research Center) for providing the CaCV-OITA isolate, and Dr. Takeshi Ohya (Kanagawa Agricultural Technology Center) and Dr. Kazuhiro Komi (Kochi Agricultural Research Center) for providing cultures of thrips populations.

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Correspondence to Tamito Sakurai.

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All authors are affiliated with NARO. The authors declare that they have no conflict of interest.

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Chiaki, Y., Kubota, K., Tomitaka, Y. et al. Transmission of capsicum chlorosis virus by Thrips palmi (Thysanoptera: Thripidae). Appl Entomol Zool 55, 31–35 (2020). https://doi.org/10.1007/s13355-019-00649-7

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  • DOI: https://doi.org/10.1007/s13355-019-00649-7

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