昌吉地区杨梦尼夜蛾幼虫分布型的初步研究

Preliminary Studies on Spatial Distribution of Orthosia incerta Hufnagl in Changji Region

杨梦尼夜蛾是新疆春季林木暴食性害虫之一。杨梦尼夜蛾在4月下旬出现高峰期。成虫具有一定趋光性、趋糖性。以幼虫咬食叶片,树木上部和树木中部外缘分布较多,其种群空间分布型为聚集分布。

Orthosia incerta Hufnagl is one of the important pests of tree that has occured in recent years in early spring of Xinjiang. In fields, its larvae caused great damage to kinds of tree, and appeared peak-hour in April last ten-days period. Its adults tend to light and tend to sugar. The investigation of spatial distribution pattern showed that the larvae belonged to aggregated distribution pattern.More part of larvae is distributed at upper part,middle part and outer edge of the tree,attacking leaves.The density of larvae at outer edge of woods is much greater than that at middle part of woods.