昆明松华坝水源保护区梨树害虫及天敌数量变动研究*

  通过对昆明市松华坝水源保护区松华乡梨园进行主要害虫、捕食性天敌的组成与数量特征的调查发现：该区域有害虫6目26科49种，主要害虫有蚜虫类、蝽类、天牛类、刺蛾类等；梨树上的主要害虫是梨二叉蚜、稻绿蝽、梨眼天牛、黄刺蛾等。捕食性天敌种类有5目6科17种，主要为瓢虫类、食蚜蝇类、草蛉类、螳螂类和捕食性蜘蛛；天敌与害虫之间有明显的时间与数量的跟随关系，天敌对害虫具有较强的控制作用。

Research on the Quantitative Change of Pests and Predators in the Pear Orchard of Water-reserve Hinterland, Kunming

Through the investigation of the composition and the character of the number of the major pests and predators was conducted in the pear orchard of water reserve hinterland of Songhua country, Kunming,it was found that: in the area there were pests in a total of 6 orders, 26 families, 49 species, the major pests were Aphids (Aphididae), Stink bugs (Pentatomidae), Longicorns (Cerambycidae), Slug mofhs (Eucleidae) in the area; the main pests of pears were Toxoptera piricola Matsumura, Nezara viridula Linn, Bacchisa fortunei Thomson and Cnidocampa flavescens Walker. There were predators in a total of 5 orders, 6 families, 17 species, the major predators are Ladybirds (Coccinellidae), Syrphid flies (Syrphidae), Chrysopas (Chrysopidae), Mantids (Mantidae) and Predatory Spider. There was obvious following relationship in time and number between predators and pests. The predators had the strong controlling function to the pests. The results could be used to make the integrated control measures of plant diseases and insect pests in the pear orchard of water reserve hinterland, and providing scientific basis.