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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。
From June 6, 2008 to September 23, 2008, the species and quantity of major pests and natural enemies in summer maize fields were systematically investigated. Species richness, dominance, diversity index and similarity index, diversity index The structure and timing dynamics of insect community were analyzed. The results showed that there were 11 families, 32 families and 44 species of pests and natural enemies in summer maize field. Rhopalosiphummaidis (Fitch) was the dominant species in maize pests community and the dominance index was 0.0002 ~ 0.3889. The diversity index was in 2008 August 7 and August 21, 2008. The temporal synchronism and spatiality of pests and their natural enemies are in line with each other, providing a theoretical basis for the protection of pests by using natural enemies and controlling maize.