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扬州地区农田常见食蚜蝇有11种,其中黑带食蚜蝇、门氏食蚜蝇、大灰食蚜蝇、短刺刺腿食蚜蝇、狭带食蚜蝇的发生量最多,是当地的优势种群。食蚜蝇以成虫、老熟幼虫、卵在林木的树皮下,在松柏等常绿树上越冬。黑带食蚜蝇种群密度季节性消长呈马鞍型,门氏食蚜蝇呈抛物线型。温度和天敌是影响种群数量变动的主要原因。食蚜蝇成虫需补充营养,在田间的分布与蚜虫密度、蜜源植物有一定关系。食蚜蝇捕食蚜虫的能力因虫种而异,黑带食蚜蝇、短刺刺腿食蚜蝇、门氏食蚜蝇一生的食蚜量分别为138.7、109.0、75.9头。食蚜蝇是一种捕食能力较强的天敌。
There are 11 kinds of common hoverfly in farmland in Yangzhou area, among them, the black-eyed hoverfly, the door-blown hoverfly, the large-shelled hoverfly, the stinging hoverfly, The dominant population. Hoverfly flies adult, mature larvae, eggs under tree bark, winterscells and other evergreens. The seasonal variation of population density of the black flies was saddle-type, and the gazelle was a parabola. Temperature and natural enemies are the main factors affecting the population changes. Hoverfly adults need nutritional supplements, the distribution in the field and aphid density, nectar plants have a certain relationship. The ability of the hoverfly to prey on aphids varies from one species of insects to another. The number of aphids in the black flies is about 138.7, 109.0 and 75.9, respectively. Hoverfly is a predatory predator.