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永年县是我区的重点韭菜生产基地。近几年来随着温室、大棚、拱棚等保护地韭菜的发展,韭蛆等韭菜根部害虫发生为害逐年加重,并缺乏理想的防治方法,成为生产中亟待解决的问题。为此我们对该县保护地韭菜根部韭蛆等害虫发生的种类、数量、为害情况作了系统调查。结果如下:1 田间调查1.1 调查日期及地点 1991年12月16日、26日,1992年3月12日、4月1日、7日、17日、5月7日共7次,对姚寨乡李寨村的4
Yongnian County is the focus of my area leek production base. In recent years, with the development of leeks in greenhouses, greenhouses, arch sheds and other protected areas, the occurrence of root pests such as leek maggot has been increasing year by year, and lack of ideal prevention and control methods has become a problem to be solved urgently in production. To this end, we conducted a systematic investigation of the species, quantity and damage of pests such as leek maggots in the protected chives in the county. The results are as follows: 1 Field survey 1.1 Survey date and place December 16, 1991, December 26, March 12, 1992, April 1, July 7, May 7, a total of 7 times, Yaozhai Township Li Zhaicun 4