【摘要】 自1990年以来,落叶松绶尺蠖在鸡西地区落叶松人工林内连续发生,严重影响树木生长。为此,进行了防治试验研究,结果表明:烟剂防治最佳时间在7月10～13日,用5%林丹杀虫烟剂防治3～4龄幼虫试验,用药量为7.5 kg/hm~2,防治面积2000 hm~2,防治效果达93.5%;喷雾防治幼虫最佳时间在7月5日前后,用25%灭幼脲Ⅲ号胶悬剂防治3龄幼虫试验。用药量为150 g/hm~2,防治效果达89.85%;喷粉防治成虫最佳时间在成虫羽化高峰期6月3日前,用3%林丹粉剂防治成虫试验,用药量为11.3kg/hm~2,防治效果达89.6%。更多还原

【Abstract】 Zethenia rufescentaria Motsch.have outbroken successively in Jixi recent years.The average pest density is up to 1300/tree in seriously attached stands. In this case,the laricis man-made forest can not grow normally.So the occurence of the pest has been observed since 1990,and the results indicated that the suitable time for controlling the pest with smoke agent is July 10～13. Lindane was used to control the third to forth instar larvae.The area controlled was 2000hm~2,the dosage was 7,5kg/hm~2,the mortality of the pest was 93.5%. The best time for spraying to control the larvae is about July 5.The third instar larvae were also treated with 25% dimilin Ⅲ(flowable formulation).The dosage was 150g/hm~2,the mortality of the pest was 89.85%.Hexyclan dust was also used to control adults of the pest before the peak of their emergence(June 3). The dosage was 11.3kg/hm~2,the mortality of the pests was 89.6%.更多还原