江苏地区2种入侵性斑潜蝇的发生分布及耐药性

Study on the occurrence, distribution and insecticide tolerance of two invasive Liriomyza species in Jiangsu Province

三叶斑潜蝇(Liriomyza trifolii)和美洲斑潜蝇(L.sativae)是我国一类园艺及蔬菜作物上重要外来有害生物,其形态学相似,危害严重。2014和2019年分别对江苏地区2种斑潜蝇的发生分布和危害程度进行调查并对其发生危害的原因进行探讨。结果表明:美洲斑潜蝇主要在苏北地区发生危害并不断向苏南地区扩张,三叶斑潜蝇主要在苏南、苏中地区发生危害,其危害范围逐渐缩小且向北扩张至徐州;2种斑潜蝇主要在豆科植物上进行危害,原先嗜食的茄科作物危害等级整体减弱,而葫芦科作物上原本占优势的三叶斑潜蝇也逐渐被美洲斑潜蝇取代;田间斑潜蝇种群对阿维菌素的敏感性最强,且扬州地区的种群药剂敏感性显著低于苏州和徐州。综上,2019年较2014年2种斑潜蝇在江苏地区发生一定程度的种群动态变化,需要加强监测,并根据近缘种斑潜蝇的发生规律和影响因子进行防治。

Liriomyza trifolii and L.sativae are important invasive pests on horticultural and vegetable plants in China, with similar biological characteristics and serious diseases. In this study, the occurrence, distribution and damage degree of two Liriomyza species in 2014 and 2019 in Jiangsu were investigated and compared. Meanwhile, the reasons for its competition substitution in Jiangsu Province were discussed. Our result showed that L.sativae was mainly found in northern regions of Jiangsu but the scope of its damage was expanding in southern regions of Jiangsu. L.trifolii was distributed across central and southern areas of Jiangsu, but its damage scope gradually narrowed and expanded northward to Xuzhou. The two Liriomyza species mainly harmed leguminous plants. In recent years, the damage level of Liriomyza on solanaceous crops was weakened, while the original dominant species L.trifolii on cucurbitaceae crops was gradually replaced by L.sativae. Abamectin had a good effect on the field population of Liriomyza and the insecticide sensitivity of Liriomyza in Yangzhou was significantly lower than that in Suzhou and Xuzhou. These results all indicated that compared with 2014, the distribution of Liriomyza in 2019 changed significantly, which indicated that it was necessary to strengthen monitoring and control based on the occurrence regularities and influencing factors of Liriomyza.