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杨干象甲虫是杨树的主要检疫对象和毁灭性害虫。所谓无公害治疗,就是根据杨树速生性的特点,用刮皮刀把其危害疤、幼虫、虫粪等一起刮净的方法。治疗杨干象甲的关键时期是幼虫开始活动危害,外部症状明显,并且危害面积较小的时期。因该虫越冬形态不同,个体发育也略有差异,所以治疗的关键时期有两次。在兴隆县,首次为4月上旬,这次是治疗以初孵幼虫越冬的杨干象甲危害疤;第二次是4月中下旬,这次除治疗以卵越冬的杨干象甲危害疤外,兼治首次漏治虫害,一周后再检查一次,以防漏治。这两个关键时期即不宜提前,也不宜错后。
Yang dry beetle is the main quarantine object of poplar and devastating pests. The so-called pollution-free treatment, that is, according to the characteristics of poplar fast-growing, scrape the skin with a knife to scab, larvae, insects and other scrape together net method. The key period for the treatment of A. elegans is the period when the larvae begin to be active, the external symptoms are obvious, and the lesion area is small. Due to the pest overwintering morphology, individual development is also slightly different, so the critical period of treatment twice. In Xinglong County, the first time in early April, this is the treatment of newly hatched larvae overwintering askew Yang scars; the second is in late April, this time in addition to the treatment of the egg overwintering askew Yang mech, but also for the first time Leak governance pests, check again after a week, to prevent leakage treatment. These two crucial periods should not be advanced in advance, nor wrong.