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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2019年56 No.1

Important natural enemies of Ricania speculum and the spatial relationship between these predators and this pest
Author of the article:CHENG Xian1** ZHANG Shu-Ping1 YU Yan1 BI Shou-Dong1*** WANG Zhen-Xing1 LI Shang2 WANG Jian-Pan
Author's Workplace:1. School of Science, Anhui Agricultural University, Hefei 230036, China; 2. School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
Key Words: Ricania speculum; natural enemies; relationship in space; geostatistics; grey correlation degree
Abstract:

 [Objectives]  To identify the dominant natural enemies of Ricania speculum and to provide a scientific basis for the comprehensive protection and utilization of such species for the control of this pest. [Methods]  Geo-statistics and grey correlation were used to analyze the spatial relationships between R. speculum and its natural enemies in two tea plantations in 2015 and 2016. [Results]  The four natural enemies whose spatial distributions were most closely correlated with that of R. speculum in the Wuniuzao tea plantation were Tetragnatha squamata Karsch, Tetragnatha maxillosa, Neoscona theisi and Theridion octomaculatum. The four natural enemies whose spatial distributions were most closely correlated with that of R. speculum in the Baihaozao tea plantation were Clubiona japonicola Boes. et Str, Theridion octomaculatum, Neoscona theisi and Hylyphantes graminicola. The four natural enemies whose spatial distributions were most closely correlated with that of R. speculum were the same in two tea varieties; in 2015, these were T. maxillosa and C. japonicola and in 2016, they were Hylyphantes graminicola and T. octomaculatum. [Conclusion]  Comprehensive analysis, including close index summation and serial number summation, indicate that the three natural enemies whose spatial distributions were most closely correlated with that of R. speculum in both tea plantations in both years, were T. octomaculatum, C. japonicola and N. theisi. These results promote the rational use and protection of natural enemies of R. speculum.

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