近年来,随着韭菜栽植面积逐年扩大,韭菜根蛆发生严重,一般为害造成缺苗20％～30％,严重菜园死苗率达80％以上,甚至翻犁毁园。为解决这一生产难题,我们在多年试验示范基础上引进美国陶氏益农公司生产的乐斯本于2000年12月份在露地栽培的韭菜上进行药效试验,并进行了示范应用。现将结果报告如下。 1 材料与方法 1.1 试验田概况 试验设在长安县申店乡申店村二组的露地栽培韭菜田;示范田安排在申店乡申店 In recent years, with the leek planting area expanded year by year, the chives root maggots serious, the general damage caused by lack of seedlings 20% to 30%, severe vegetable seedling rate of 80% or more, or even turn the plow ruin Park. In order to solve this production difficult problem, we introduced the test of the company for many years on the basis of the United States Dow AgroSciences production Lesben in December 2000 in the open cultivation of leeks for efficacy tests, and for demonstration purposes. The results reported below. 1 Materials and methods 1.1 Experimental field profile The experiment set up in Chang’an County Shendian Shendian two groups of open field cultivation leek field;