The Relationship of the Major Natural Enemies and Pests under Annually 3 Times of Chemical Pesticide Spray in Apricot Orchards

doi:10.16409/j.cnki.2095-039x.2016.04.003

Abstract

Abstract: The investigation was carried out on the dynamics of major natural enemies and pests under annually 3 times of chemical pesticides spray in fresh apricot orchards in Yanqing County, Beijing, China. The ecological niche, niche breadth and grey relational grade in the apricot orchards were analyzed as well to provide the technical reference for reducing annually the frequency of chemical pesticide application and protecting and utilizing natural enemies. The results showed that Tetranychus viennensis (Zacher), Myzus persicae (Sulzer) and Empoasca flavescens (Fab.) were the major pests and predatory spider, Chrysopa pallens (Rambur), Harmonia axyridis (Pallas), Metasyrphus corollae (Fabricius), parasitoid wasp and Propylaea japonica (Thunberg) were the major natural enemies. T. viennensis appeared in whole growing season. M. persicae appeared from mid-May to early June and E. flavescents mainly happened in August. There were strong sympatric and synchronization between H. axyridis and T. viennensis, M. corollae and M. persicae, parasitoid wasp and E. flavescens. It was conducted that H. axyridis, M. corollae and parasitoid wasp were the main advantages of controlling pest predators, should be protected.

Key words: fresh apricot, natural enemy and pest, population dynamics, ecological niche, grey relational grade

CLC Number:

S436.62

LIU Qizhi, LIU Lele, LUAN Xiaobing. The Relationship of the Major Natural Enemies and Pests under Annually 3 Times of Chemical Pesticide Spray in Apricot Orchards[J]. journal1, 2016, 32(4): 434-439.

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