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沙枣(Elaeagnus angustifolia L.)又叫桂香柳,是一种群众喜爱的固沙造林树种。张掖市九龙江国营林场有沙枣成林2万5千余亩,平均树高6米,树龄15年,对于防止风沙灾害,保证农田丰收,以及作为种子及民需用材的供应基地,起着重要的作用。 沙枣尺蠖(Apochemia)是当地沙枣的主要害虫,幼虫严重食害叶片,造成沙枣种子的严重减产。近年来陆续采用人工捕打和药剂毒杀等方法,使虫害逐渐减轻,但因缺乏全面、周紧地防治,虫害仍未制止。据今
Elaeagnus angustifolia L., also known as cinnamon, is a favored afforestation tree species. Zhangye City Jiulongjiang State Forest Farm jujube forest more than 25,000 acres, the average tree height of 6 meters, the age of 15 years, for preventing wind and sand disasters, farmland harvest to ensure, and as a seed and the supply base for civilian needs material Important role. Apocynum (Apochemia) is a major local jujube pests, larvae seriously eaten leaves, resulting in a serious cuttage jujube seeds. In recent years, one after another using artificial catching and poisoning agents and other methods to gradually reduce pests, but due to lack of comprehensive, tight control, pests have not stopped. According to today