萝卜蝇又叫白菜蝇,是地蛆的一种,幼虫主要为害萝卜,白菜及油菜等十字花科蔬菜。 萝卜蝇一年只发生一代。成虫为蝇类,体长略小于家蝇。对糖醋液和未腐熟的有机物质有趋性。成虫羽化后一周左右产卵,4～7天后便孵化幼虫,幼虫头端细,尾端粗,孵化后的幼虫很快就可钻入萝卜白菜的组织内为害。幼虫期35～40天,老熟幼虫于10月入土化蛹,以蛹在植株附近的土壤里越冬,少数化蛹晚的随秋菜被带到菜窖内越冬。 Radish fly called cabbage fly, is a kind of maggot, the main larvae radish, cabbage and rape and other cruciferous vegetables. Turnip flies happen only a generation a year. Adult flies, body length slightly smaller than housefly. Sweet and sour liquid and not decomposed organic substances have tendency. Adult emergence about a week after oviposition, 4 to 7 days after hatching larvae, larvae tip thin, tail thick, hatching larvae can quickly drill into the radish cabbage tissue damage. Larvae 35 to 40 days, mature larvae in October pupation, the pupa in winter in the soil near the plant, a small number of late pupa with autumn vegetables are brought to the winter cellar.