油茶园主要害虫茶袋蛾及其天敌间相互关系

The relationships between a main pest Clania minuscula (Butler) and its natural enemies in oil-tea camellia orchard

2003年6月至2004年5月在对油茶园害虫茶袋蛾及其天敌种群数量系统调查基础上,运用生态位理论和灰色关联度及模糊贴近度方法,系统研究了茶袋蛾与其天敌间相互关系。结果表明:与茶袋蛾空间生态位重叠值>0.8758的天敌有跳蛛、圆蛛和蟹蛛;时间生态位重叠值>0.4748的天敌有蟹蛛、圆蛛和肖蛸。天敌与茶袋蛾灰色关联度较高的种类依次为圆蛛、姬蜂、小蜂、寄蝇和微蛛;与理想天敌关联度较高的天敌种类为微蛛、肖蛸、跳蛛、姬蜂和小蜂;天敌同茶袋蛾和理想优势种关联度总积分较高的依次为微蛛=姬蜂>圆蛛=肖蛸=小蜂。茶袋蛾与其天敌模糊贴近度最大的是圆蛛,其次为肖蛸。这些结果表明圆蛛对茶袋蛾追随效应显著,为优势种天敌,其次为肖蛸。

The populations of Clania minuscula and its natural enemies were systemically investigated from June 2003 to May 2004 in oil-tea camellia orchard. The relationships between a main pest Clania minuscula and its natural enemies were analyzed by niche theory, grey system theory and fuzzy neartude. The results showed the species having 〉 0. 8758 spatial niche overlaps with Clania minuscula were sahicids, aarneids and thomisids, while the temporal niche overlaps between thomisids, aarneids, tetragnathids and Clania minuscula were 〉 0. 4748. The grey relevancy analysis showed the major natural enemies of Clania minuscula were aarneids, ichneumonids, chalcidoids, tachinids and micryphantids, while the major natural enemies associated with superior natural enemies were micryphantids, tetragnathids, salticids, ichneumonids and chalcidoids. Based on relevancy of between natural enemies and Clania minuscula and superior natural enemy, the high degree of influence of the enemy populations on Clania minuscula was micryphantids = ichneumonids 〉 aarneids = tetragnathids = chalcidoids. The natural enemy having highest fuzzy neartude with Clania minuscula was aarneids, followed by tetragnathids. It could be concluded that the natural enemy, aarneids, which was highly associated with Clania minuscula was superior enemy, followed by tetragnathids.