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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。
South American leafminers have become the major pests on vegetables in Guiyang. Through the combination of fixed-point systematic investigation and indoor feeding in three counties (autonomous regions and municipalities), the habits and the occurrence regularities of the insects were basically ascertained. The results showed that there was no diapause in Lianyungang, but could endanger the annual damage in the period of April to November. The warm and humid conditions were favorable. When the temperature was above 10 ℃, there was a positive correlation between the growth and decline of insects in the field and relative humidity, As the climate changes, each year to form 2 to 3 hazards peak. And found two kinds of natural enemies such as Liriomyza sativae. Control should be to strengthen phytosanitary, agricultural control and timely chemical control combined with the use of efficient, low toxicity pesticides and biological pesticides, reduce the population base to protect natural enemies, control hazards.