小蜡绢须野螟生物学特性研究

小蜡绢须野螟Palpita inusitata(Butler)在浙江丽水1 a发生7代,以幼虫在虫苞内越冬。翌年3月上中旬幼虫开始活动,3月下旬出现成虫,以后各代成虫发生盛期分别为5月中旬、6月中旬、7月中旬、8月上旬、9月上旬、10月中旬。成虫趋光性和飞行能力均较弱,卵大多散产于叶背中脉附近,2~7粒排成一线。幼虫共5龄,织苞危害小蜡叶片,老熟幼虫在虫苞内或枯枝落叶中结薄丝茧化蛹。

Bionomics of Palpita inusitata (Butler)

Palpita inusitata(Butler) has 7 generations a year in Lishui of Zhejiang Province and overwinters as larva.The larva revives in early or mid March the next year.The adult emerges in the end of March.The emergence peaks of the adults of the other generations are mid May,mid June,mid July,early August,early September and mid October.The phototaxis and flight of adult are weak.Eggs are laid on the medial veins of leaves.The larvae have 5 instars and attack the leaves of Ligustrum sinense.The mature larvae pupate within a thin cocoon in duff.