云南锦斑蛾 Achelura yunnanensis 生物学特性及发生规律的初步研究

云南锦斑蛾Achelura yunnanensis是近几年在云南樱花Cerasus serrula上发生的一种食叶性害虫。本文通过林间调查和人工饲养相结合的方法,首次明确了云南锦斑蛾的生活史和发生规律。云南锦斑蛾在昆明地区一年发生1～2代,以老熟幼虫越冬。翌年4月下旬成虫陆续羽化,将卵散产于寄主植物树干的树皮缝或皮孔处,卵期15～17 d,6月上旬幼虫孵化,幼虫多为8龄(44%)、9龄(47%),少数10龄(9%)。低龄幼虫食量较小,高龄幼虫食量大增,有吐丝下树转移为害的习性。9月下旬老熟幼虫在小枝或枯枝落叶层结茧越冬,越冬期长达6个月。成虫飞翔能力弱,具有较弱的趋光性。

Biological characteristics and occurrence patterns of Achelura yunnanensis (Lepidoptera: Zygaenidae) in Yunnan Province

Achelura yunnanensis (Lepidoptera: Zygaenidae) is an important defoliator pest and has caused serious damage on Cherry, Cerasus serrula in recent years in Kunming, Yunnan Province. In order to control its damage, the biological characteristics and occurrence patterns of A. yunnanensis were investigated by artificial rearing on the leave of C.cerasoides in the field and laboratory. The moth has 1-2 generations per year in Kunming and overwinters with mature larvae. The adults emerge in late April and lay eggs in the bark dehiscences or lenticels. The egg duration is 15-17 days. The larva hatches in early June and has eight (44%), nine (47%) and ten (9%) instars in the whole stages. It feeds a little at the beginning and disperses to feed by spinning silk from the sixth instar. Mature larvae overwinter in a cocoon at twigs or forest litters in late September, and the overwintering period is up to six months. The adult has weak flying ability and photokinesis.