论文部分内容阅读
刺槐尺蠖繁殖量大,食性杂,危害重,是我省重要的森林害虫之一。1961年以来,该虫在我省眉县地区每年都有不同程度的发生和危害,它不仅直接影响刺槐林的正常生长,而且使农作物、果树及其它多种林木遭到严重威胁。对于该虫的防治已往多采用喷撒六六六药粉,由于该虫种成虫羽化期不集中,老熟幼虫抗药性较强,为化学药剂防治带来一定的困难。施药不当时还会杀伤大量天敌,结果导致年年喷药防治,年年虫害发
Robinia pseudoacacia reproductive capacity, feeding habits, endangering heavy, is one of the important forest pests in our province. Since 1961, the insects have occurred and harmed to varying degrees every year in Meixian County, which not only directly affects the normal growth of the locust but also threatens the crops, fruit trees and other kinds of trees. For the prevention and treatment of the insect has always been to use more than 666 powder spray, because of the insects eclosion period is not concentrated, mature larvae more resistant to chemical control to bring some difficulties. Improper spraying will kill a large number of natural enemies, resulting in annual spraying prevention and treatment, insect pests