论文部分内容阅读
为摸索适合吕梁山区的枣步曲防治办法,1979-1980年,结合全区林木病虫害普查,对枣树害虫种群数量、分布区域、虫口密度以及危害程度作了全面调查,从1981年起在临县丛罗峪公社刘家山等地,结合气象、物候因子,对枣步曲的生活习性和防治措施作了研究。一、生活习性枣步曲又名枣尺蠼,当地还有虼挤、顶门吃之称,由专食枣树发展为危害梨、苹果、桃、杏、李等多种果树,在我区兴县、临县、柳林、石楼等地严重发生,据1982年在刘家山大队随机抽样100株调查,每株枣树平均有枣步曲越冬蛹8头(在以树干为圆心,半径2.5米,深20厘米的范围内),最多的达24头。
In order to explore suitable methods of preventing and curing jujube step in Luliang Mountain area, from 1979 to 1980, with the survey of pests and diseases in the region, a comprehensive survey was conducted on the population, distribution area, population density and harmfulness of jujube tree pests. County Cong Luo Valley commune Liu Jiashan other places, combined with meteorological, phenological factors, dates on the life habits and prevention measures were studied. First, the habits of jujube Step by step, also known as jujube 蠼, there are crowded local crowded, said the door to eat, from edible jujube tree developed to endanger pear, apple, peach, apricot, plum and other fruit trees in my district Xing County, Linxian, Liulin, stone floor and other places serious occurrence, according to 1982 random sampling Liujunshan brigade 100, each jujube jujube per plant on average overwintering pupae 8 (in the trunk as the center, a radius of 2.5 Meters, a depth of 20 cm) up to a maximum of 24 heads.