美洲斑潜蝇是 1995年黔东南州首次发现的一种严重危害蔬菜、花卉及烤烟等作物的多食性检疫害虫 ,成虫和幼虫均危害作物地上部叶片及叶柄 ,一般被害叶率 15%～ 50 % ,严重时达85%以上 ,造成受害叶大量枯黄脱落 ,减产 30 %以上。室内饲养和田间观察表明 ,该虫的发育受温度影响较大 ,一年完成 12～ 14代 ,无明显越冬现象 ,只要月平均温在 10℃以上就有虫活动 ;成虫寿命3～ 15d,每头雌虫产卵 60～ 2 0 0粒 ;卵历期 4～ 16d,幼虫期 3～ 2 0 d,蛹历期 6～ 30 d。秋播期间和早春是防治该虫的有利时期 It is the first pest that was found in Qiandongnan Prefecture in 1995 to seriously injure the crops such as vegetables, flowers and flue-cured tobacco. Both adults and larvae harmed the leaves and petioles of the upper leaves of crops. The damage rate of the leaves was 15% ~ 50% %, Serious up to 85%, resulting in a large number of affected leaves off yellow, cut more than 30%. Indoor feeding and field observation showed that the development of the pest affected by the temperature of larger, completed 12 to 14 generations a year, no significant winter phenomenon, as long as the monthly average temperature above 10 ℃ on the worm activity; adult life of 3 ~ 15d, each Females spawn from 60 to 200 eggs, 4 to 16 days in eggs, 3 to 20 days in larvae and 6 to 30 days in pupae. During autumn seasons and early spring it is a good time to control the pests