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对 1 998和 1 999年 1 0块不同类型的烟田烟蚜种群数量及其各种天敌的种群数量和捕食量 ,利用灰色系统理论和方法 ,分析各种天敌的日捕食总量与烟蚜种群数量的追随关系以及各种天敌与理想优势种天敌之间的关联度。结果表明 ,对烟蚜种群数量影响最显著的是草间小黑蛛和蜘蛛类 ,其次是瓢虫类和龟纹瓢虫
Based on the gray system theory and method, the population of all kinds of natural enemies and the population quantity and predation quantity of 10 kinds of Myzus persicae in different types of tobacco fields in 1998 and 1999 were analyzed. The follow-up of population numbers and the correlation between various natural enemies and natural enemies of ideal dominant species. The results showed that the population of Myzus persicae populations most significantly affected by the black grass spider and arachnids, followed by the ladybug and ladybug