美洲斑潜蝇在忻定盆地的发生及综合治理

关洲斑潜绳(Liriomyza Sativae Blanchard),1997年传入山西忻州市忻定盆地,以后相继分布于全市所辖县(市)。据3年观察年生7～8代,4月下旬至5月上旬由温室迁出露地,9月下旬至1O月上旬从露地进入温室,温室繁殖代数为2～3代,露地为5代。危害高峰期3个,1～2月温室高峰期;5月上旬至6月上旬为露地第一高峰期;7月下旬至8月下旬为第二高峰期。这3个高峰期危害的主要作物有5科18种,且豆类>瓜类>茄科>十字花科。为控制其危害提出一道防线、二期控制的策略。一道防线是加强植物检疫,二期控制是越冬期控制温室虫源,高峰期统防统治,压低虫量,减少损失。

Occurrence and IPM of Vegetable Leafminer (Liriomyza Sativae Blanchard) in Xinding Basin

Since it was dispersed in Xinding basin in 1997, Vegetable lea fminer (Liriomyza Sativae Blanchard) has been scattered through all counties of Xinzhou district. On the basis of three years' observation there are 7 to 8 generations each year, of which 2 or 3generations occur in the green house and 5 generations occur in the open field. The insect is transferred from the green house to the open field between late April and the first 10 days of May and then back to the green house again between late September and the first 10 days of October. There are in total 3 peaks of insect activity and crop damage: foom January to February in the green house is the first peak, from the first 10 days of May to the first 10 days of June in the outdoor is the second, and the third is from late July to late August. About 5 families, including 18 species'of crops were damaged by this pest during these three peaks and these crops are mainly damaged in the following order; leguminosae> melon > solanaceaet>comositae>cruciferae. To control this pest, two strategies are mentioned, one is to strengthen the plant quarantine, the other is to reduce the over wintering source in te green house, and to prevent and control the insect during its peak of activity with the aim of lower population density and lower yield loss.