Effect and Status of Neutral Insect Mosquitoes on Arthropod Community in Different Tea Plantations

PurposeIn order to clarify the position and function of neutral insects and mosquitoes in arthropod community in tea plantations, this study provided a scientific basis for the scientific and rational protection and utilization of natural enemies in the integrated control of tea plant pests.

MethodFor 2015 and 2016 Baihaozao tea garden and Wuniuzao tea garden and 2014 and 2015 Anjibaicha tea plant mosquitoes and the main plant-eating insects Brevipalpus obovatus, Monolepta hieroglyphica, Empoasca vitis, Thripidae and Toxoptera aurantii five kinds of pests and eight kinds of spider taxa were analyzed. Gray relational degree method was used to analyze the correlation between mosquitoes and five pests and spider groups. The method of niche similarity coefficient with time was used to analyze the relationship between mosquitoes and five kinds of insects and spiders that over time. The path analysis was used to analyze the direct and indirect effects of mosquitoes and five kinds of pests on the spider groups. The results are standardized and evaluated synthetically to obtain the first three preys which have a great effect on spider natural enemies.

ResultDividing the maximum value of each parameter, the normalized ratios of the three varieties in different years were added, and the maximum was the most prevalent or most prey to the spider group. As a result, the number one predator was M. hieroglyphica, the second was mosquito and the third was T. aurantii. In time, the first prey bait was M. hieroglyphica, the second was the mosquito, the third was T. aurantii. According to the standardization of R²(j) values in two years of three kinds of tea gardens, the first prey was E. vitis, Thripidae was the second , the third place was the mosquito.

ConclusionThis shows that mosquitoes in the replacement of prey living in the main position in the growth and reproduction of spiders played a big role in the replacement.