【摘要】 2008年6月6日至2008年9月23日系统调查了夏玉米田主要害虫及天敌的种类和数量动态变化,并运用物种丰富度、优势度、多样性指数和相似性指数、相异性指数分析了昆虫群落的结构和时序动态。结果表明,在夏玉米田共有害虫和天敌11目32科44种;玉米蚜[Rhopalosiphummaidis(Fitch)]为玉米害虫群落中的最优势种,优势度指数为0.0002～0.3889;多样性指数在2008年8月7日和2008年8月21日达到两个高峰值;害虫及天敌在时间上的同步性和在空间上的同域性一致,为保护利用天敌、控制玉米的害虫提供理论依据。更多还原

【Abstract】 Investigation of insect communities in the summer corn fields were carried out systematically from June 6 to September 23 in 2008. Structure and dynamics of insect communities were analyzed via species richness, dominance, diversity index, index of similarity, dissimilarity index. The results showed that all insects investigated belonged to 11 orders, 32 families, 44 species; Rhopalosiphum maidis(Fitch) was the most dominant species of corn pests with dominance index of 0.000 2-0.388 9; two peaks of diversity index appeared in the 7th and 21st of August in 2008; The synchronicity of time and the sympatry of space of pests and natural enemies were identical, which applied theoretical foundation for protection of natural enemies and control of corn pests.更多还原