贵州人工混播草地昆虫群落组成与季节动态变化

为人工混播草地害虫的科学防治提供参考依据,采用网捕和陷阱法研究贵州独山县豆禾混播草地昆虫群落的结构组成及其季节性动态变化规律。结果表明:害虫类亚群落占混播草地昆虫群落的主导地位,4月各类昆虫发生量均较小,7月和8月为害虫和天敌发生高峰期,10月和11月捕食性天敌和寄生性天敌亚群落个体数量趋于0,而害虫类亚群落仍保持较高的个体数量。因此,7月和8月为混播草地害虫防治的重点时期,10月和11月仍需关注害虫发生与危害。

Composition and Seasonal Dynamics Change of Insect Community in Mixed Sowing Artificial Grassland in Guizhou

The structural composition and seasonal dynamics regulation of insect community in legume-grass mixed sowing artificial grassland were studied by net and trap methods to provide a reference for pests' scientific control in mixed sowing artificial grassland.Results: The sub-community of pests accounts for the leading role in the insect community of mixed sowing artificial grassland.The occurrence amount of different insect species is less in April and the occurrence peaks of pests and natural enemies are in July and August.The individual number of predator and parasitic natural enemy sub-community trends zero in October and November but the sub-community of pests still keep the higher individual quantity.In conclusion, July and August are the key periods of controlling pests in mixed sowing artificial grassland, and pest occurrence and damage still be paid close attention to in October and November.