重庆市郊不同种植制度菜地昆虫群落结构研究

文章报道了1990年6月—1991年5月对重庆市郊13种不同种植制度菜地昆虫群落的调查研究结果。凋查中发现47种昆虫,按发生数量、时间和为害程度,可将害虫区分为3类。优势害虫主要是珠砂叶螨、菜缢管蚜、小菜蛾和菊潜叶蝇。各种菜地昆虫群落的多样性有所不同,但具有共同趋势,即昆虫目的多样性H(O)]大于目内科的多样性Ho(F)],又大于科内种的多样性H_F(S)];均匀度都低,优势种十分突出,模糊聚类分析表明,13种菜地昆虫群落可划分为5个亚群落,各亚群落在蔬菜种类、换茬方式以及昆虫组成上各有特点。

STUDIES ON THE INSECT COMMUNITY STRUCTURES IN VEGETABLE FIELDS ADOPTING DIFFERENT CROPPING SYSTEMS IN THE SUBURB OF CHONGQING CITY

In 1990-1991,investigations on the insect communities in thirteen vegetable fields with different cropping system implementations were carried out in the suburb of Chongqing City. According to the occurrence amount ,time and damage levels,the 47 insect species found fr(?) investigations were divided into three parts. The dominant species were mainly carmine spider mite Tetranychus cinnabarinus(Boisduval) , mustard aphid Lipaphis erysimi (Kaltenbach) , diamond-back moth Plutella xyllostella Linnaeus and garden pea leaf miner Phytomyza atricornis Meigen. Although there were different diversities among the insect communities in various vegetable fields,their tendencies were similar,i, e. the sequence of diversities were H(O)>Ho(F)>HF(S). All their even-ness were low and the dominent species were highly prominent. The results of fuzzy clustering analyses showed that the insect communities in these thirteen vegetable fields were divided into five sub-communities .which were distinct each other in vegetable species,rotation systems and components of insect species.