Relationships among main pests (Coleoptera) and their predatory natural enemies in tea garden of the Dabie Mountain area
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Key Words：tea garden, Coleoptera pests, predatory enemies, population dynamics
Abstract： Analysis of the abundance, temporal occurrence and spatial patterns of two Coleopteran insect pests and their predatory natural enemies was conducted using grey system analysis, ecological niche analysis and collective intention analysis. The two insect pests were Myllocerinus aurolineatus Voss and Basilepta melanopus Lefevre. The synthetic ranking results indicate that the dominant natural enemies of M. aurolineatus were Synuchus atricolor Bates, Enoplognatha japonica Boes.et Str. and Xysticus ephippiatus Simon. Dominant natural enemies of B. melanopus were Erigonidium graminicolum Sundevall, Tetragnatha maxillosa Thorell and Neoscona theisi Walckenaer. Average aggregation size of M. aurolineatus was less than two due to environmental factors but the average aggregation size of B. melanopus was greater than two due to the natural tendency of this pest to aggregate.Due to a variety of environmental factors (including pests) the average aggregation sizes of the natural enemies were less than two.