Control of Tea Pests by the Banker Plant System of Orius strigicollis-Vicia faba-Aphis fabae

doi:10.16409/j.cnki.2095-039x.2021.05.008

Abstract

Abstract: As a new biological control method, banker plant system is of high control efficacy and application value. Aphis fabae prefers leguminous plants and is safe to tea plant, and is a prey that can satisfy the growth and reproduction needs of Orius strigicollis. Therefore a banker plant system consisting of A. fabae as alternative prey, Vicia faba as banker plant, and O. strigicollis as natural enemy was established to control tea pests. The control efficacy of the banker plant system was compared with that of the direct release of O. strigicollis on the tea aphid Toxoptera aurnantii in the laboratory. T. aurnantii, Dendrothrips minowai and Empoasca onukii, the three principal pest species in tea plants, can all be preyed by O. strigicollis. The control efficacy of the banker plant system and the direct release of O. strigicollis on the three pests were also investigated in field experiment. The results showed that, in the laboratory experiment, the population size of T. aurnantii was significantly lower and the population decline rate and control efficacy of T. aumantii were significantly higher in the banker plant system than in the direct release of O. strigicollis in the first three surveys. The banker plant system achieved control efficacy as high as 92.16%, while the direct release of O. strigicollis reached control efficacy of only 72.25%, indicating a potential of the banker plant system to be used in the field for tea pest control. In the field experiment, the layout of the banker plants (strips, blocks and dots) showed no significant influence on the control efficacy of tea pests. Both the banker plant system and the direct release of O. strigicollis resulted in significant control of E. onukii, as high as 90%, but they did not have significant control of T. aurnantii and D. minowai. These results indicate potential of both the banker plant system and the direct release of O. strigicollis for control of tea pests, but depending on the co-occurring pest species.

Key words: Orius strigicollis, Aphis fabae, banker plants system, Toxoptera aurnantii, Empoasca onukii, Dendrothrips minowai

CLC Number:

S476.2

LIU Mei, ZHANG Changrong, BAN Feixue, LIU Shaolan, RAN Qianjun, SHANG Xiaoli, ZENG Guang, CAO Yu, SUN Yuehua. Control of Tea Pests by the Banker Plant System of Orius strigicollis-Vicia faba-Aphis fabae[J]. Chinese Journal of Biological Control, 2021, 37(5): 936-945.

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