【摘要】 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更多还原

【Abstract】 Systematical investigations on population dynamics of Myzus persicae and its natural enemies in all stages of tobacco growth were conducted on 10 different types of fields in 1998 and 1999. The relationship between daily total predation of natural enemies and M.persicae population size was analyzed with the grey system theory and method, and the relational grade of various natural enemies to ideal dominant natural enemies was also analyzed. The results indicated that Erigonidium graminicola and Araneae were the major natural enemies affecting M.persicae,followed by Coccinellidae and Propylaca japonic.更多还原