论文部分内容阅读
灰钝额斑螟Bazaria turensis Ragonot是柴达木盆地白刺(Nitraria sp.)灌丛的主要害虫,为了有效控制该害虫对白刺的危害,采用室内饲养和田间定点观察,对灰钝额斑螟进行了生物学特性观察。结果表明灰钝额斑螟在柴达木盆地1年发生1代,有卵、幼虫、蛹和成虫4种虫态,通过头壳宽确定了幼虫为5个虫龄,以滞育蛹越冬。翌年5月中旬开始羽化,5月下旬为羽化高峰期,6月中旬孵化,6月下旬为孵化盛期,8月上旬开始结茧化蛹,8月中旬结茧化蛹高峰期,随后蛹进入滞育越冬。6月下旬初龄幼虫发生盛期是该害虫防治的最佳时期。
Bazaria turensis Ragonot is a major pest of Nitraria sp. Shrub in the Qaidam basin. In order to effectively control the damage of this pest to it, Biological characteristics were observed. The results showed that in the Qaidam Basin, Elaeocarpus obscurus occurred one generation a year, with four kinds of insect states, eggs, larvae, pupae and adult. The larvae were identified as 5 insect-headed by the head-shell width and diapause pupae were wintering. The emergence of eclosion in the middle of May next year, the peak of eclosion in late May, hatching in mid-June and the peak of hatching in late June. The pupae started to cocoon in early August and the peak of pupa in mid-August, Diapause wintering. The first instar larvae peaked in late June, which was the best time for pest control.