论文部分内容阅读
近几年邯郸地区蟋蟀发生严重。1985—1987年,每m~25头以上的农田在200万亩以上,一般20—50头,高者在300头以上。优势种为油葫芦、棺头蟋和姬蟋。若虫期为害禾谷、蔬菜等幼苗,严重地块可造成缺苗断垄,甚至毁种,成虫还为害作物的蕾、花和果实。为寻找取代六六六防治蟋蟀的农药,笔者于1986年7月中旬(若虫二至四龄期)在曲周县的张庄、油贺和麻庄村的玉米田,用E605、溴氰菊酯和甲胺磷等,分别以毒土、喷雾和毒饵等方式进行药效试验,前2种药剂效果极差。1987年同期,又以甲胺磷等3种药剂进行试验,取得较好的效果(见表)。试验小区面积0.5亩,3次重复,药后5天根据残虫量计算防效。
In recent years, serious crickets in Handan area. From 1985 to 1987, more than 200 mu of farmland was cultivated with more than 25 heads per m, generally 20-50 heads, and more than 300 heads. The dominant species is oil hyacinth, coffin head cricket and Ji cricket. Nymphs damage cereal, vegetables and other seedlings, a serious block can cause lack of seedling broken ridge, or even rupture, adults also harm the crop buds, flowers and fruits. In order to find a pesticide to replace Cricket Prevention and Control, the author studied corn fields of Zhangzhuang, Youhe and Mazhuang Village in Quzhou County in mid-July 1986 (nymphs 2-4), using E605, deltamethrin And methamidophos, respectively, to poison soil, spray and bait and other ways for efficacy tests, the first two kinds of agents very poor results. The same period in 1987, but also with methamidophos and other three kinds of agents tested to obtain better results (see table). The test plot area of 0.5 acres, 3 times repeated, 5 days after drug calculation based on the amount of anti-disease effect.