南美斑潜蝇生活习性和发生规律及防治策略

Life Habits and Occurrence Regularity of Liriomyza huidobrensis and Control Countermeasures

南美斑潜蝇已成为贵阳市蔬菜上的主要害虫。通过在3 个县(区、市)进行定点系统调查与室内饲养相结合,基本摸清了该虫的生活习性和发生规律。结果表明:南美斑潜蝇在贵阳无滞育现象,可周年危害,危害盛期在4～11 月;温暖多湿利于发生,当气温在10℃以上时,田间虫情消长与相对湿度呈正相关,随气候的变化,每年形成2～3个危害高峰期。并发现斑潜蝇茧蜂等2 种天敌。防治应以加强植物检疫、开展农业防治与适时化学防治相结合,使用高效、低毒农药和生物农药,压低虫口基数,保护天敌,控制危害。

Liriomyza huidobrensis has become an injurious insect in various vegetables in Guiyang city. By combing field fixed spot systematic investigation in three counties with indoor feeding, life habits and occurrence regularity of Liriomyza huidobrensis were studied and basically known. The study result showed that Liriomyza huidobrensis has no habit of stagnant birth and can damage various vegetables in whole year with serious damage period during April to November. Warm and moist weather is in favor with Liriomyza huidobrensis propagation. Its reproductive capacity is positively correlated with relative humidity above 10℃ of atmospheric temperature. With the weather variation, 2～3 damage peaks are occurred. Two kinds of natural enemy such as Opius spp. have been found. Strengthening plant quarantine and agricultural control combined with chemical control in which pesticides with high effectiveness and low toxicity and biological pesticides are more useful to reduce the pest population and project natural enemies are effective control countermeasures against Liriomyza huidobrensis damage.