Study on the Control Effect of Chemical Pesticides on the Empoasca onukii Adults

ZOU Jiating; GUO Yuhang; BIAN Lei; LUO Zongxiu; LI Zhaoqun; XIU Chunli; FU Nanxia; CAI Xiaoming

doi:10.13305/j.cnki.jts.2023.04.003

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Journal of Tea Science ›› 2023, Vol. 43 ›› Issue (4) : 544-552. DOI: 10.13305/j.cnki.jts.2023.04.003

Research Paper

Study on the Control Effect of Chemical Pesticides on the Empoasca onukii Adults

ZOU Jiating^1,2, GUO Yuhang^1,2, BIAN Lei¹, LUO Zongxiu¹, LI Zhaoqun¹, XIU Chunli¹, FU Nanxia¹, CAI Xiaoming^1,*

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Abstract

Empoasca onukii is an important pest in tea gardens. Currently, the control was mainly depended on chemical pesticides, but less attention was paid to the control effect on the adults. In this study, the control effects of chemical pesticides on the adult E. onukii were evaluated through field experiments, and the reasons for the poor control efficiency were investigated by laboratory test. The results show that the chemical pesticides with good control effects on nymphs in the field did not have ideal control effects on adults. Indoor studies have shown that when spraying the entire tea shoots at concentrations even lower than those in the field, the adult mortality rates were 100%. Furthermore, the adult mortality rates were the highest (63.33%~71.67%) when the pesticides were applied at the middle part of tea plant shoots, and the adult mortality rates were the lowest (20.00%~28.33%) when applied at the top of shoots. Moreover, the adult mortality rate could be increased by increasing the shading range around the shoots or reducing the light intensity at the top of the shoots, when the pesticides were applied at the top of shoots. These results indicate that the main reason for the poor control efficiencies of chemical pesticides on the adult E. onukii in field is that the adults mainly live in the middle part of tea plant shoots. This phenomenon should also be related with light intensity. This finding provided a reference for the control of the adult E. onukii, and helped to enhance the control effects of chemical pesticides on E. onukii.

Key words

Empoasca onukii / adults / affecting factors / chemical pesticides / control effect

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ZOU Jiating, GUO Yuhang, BIAN Lei, LUO Zongxiu, LI Zhaoqun, XIU Chunli, FU Nanxia, CAI Xiaoming. Study on the Control Effect of Chemical Pesticides on the Empoasca onukii Adults[J]. Journal of Tea Science. 2023, 43(4): 544-552 https://doi.org/10.13305/j.cnki.jts.2023.04.003

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