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从森林健康理念出发,以克拉玛依市农业开发区的农田防护林为研究对象,对防护林采取修枝、间伐、截干等营林措施调控林分的密度、改善林分健康水平,从而达到控制杨盾蚧虫口密度的目的。与此同时,对杨盾蚧主要天敌种类及其控制效果进行了评价。结果表明,营林措施对各处理区林分生长有一定的促进作用,修枝区、修枝间伐区和截干区的平均虫口减退率分别达到了29.28%,40.12%和100%。调查发现杨盾蚧的天敌主要是长棒四节蚜小蜂和孪斑唇瓢虫,其中长棒四节蚜小蜂对杨盾蚧的自然寄生率高达41.50%,而孪斑唇瓢虫对杨盾蚧若虫具有较大的捕食潜能。
Starting from the idea of forest health, taking the farmland shelterbelt in the agricultural development zone of Karamay as the research object, adopting the measures of afforestation, thinning and truncation to control and control the density of the shelterbelt, improve the health level of the forest, so as to control Yang Dun The purpose of scale insects mouth density. In the meantime, the types of the major natural enemies of D. sinensis and their control effects were evaluated. The results showed that the measures of silviculture promoted the growth of stands in all treatment areas. The average reduction rates of the population in pruning, pruning and truncated areas reached 29.28%, 40.12% and 100% respectively. The survey found that the natural enemies of D. sinensis mainly four long aphid wasps and twin spots lip ladybugs, of which four long aphids bees on the natural parasitic rate of D. sinensis as high as 41.50%, and twin spots lip ladybug pair Yang shield scale nymphs have greater predation potential.