核桃举肢蛾是核桃产区的重要害虫之一 ,近年来为害逐年加重 ,为此 ,笔者从 1 995年开始 ,在卢龙县对该虫进行了调查和防治。据调查 ,举肢蛾的为害程度与地形、地力和雨水有关 :(1 )地形。生长于沟谷的树比生长在平原的树受害严重 ,阴坡比阳坡受害重。山沟树虫果率高达 45 % ,而 Walnut Ligustrum lucidum is one of the important pests in the walnut producing areas. In recent years, the pests have increased year by year. Therefore, from1995, the author conducted a survey and control on the insects in Lulong County. According to the survey, the degree of damage caused by Ligustrum lucidum is related to topography, ground force and rainwater: (1) Topography. Trees growing in the valleys suffer more than trees growing in the plains, with shady slopes harder than the sunny slopes. Ravine tree fruit rate as high as 45%