弧目大蚕蛾生物学特性研究

【目的】研究弧目大蚕蛾生物学特性。【方法】林间定点调查结合室内观察记录弧目大蚕蛾生物学特性。【结果】弧目大蚕蛾每个卵块含卵3～33粒,卵期180 d左右。4月中旬孵化,幼虫期38～40 d左右。9月中旬开始羽化,成虫期3～7 d。灯诱弧目大蚕蛾成虫数量有两个高峰时期,在22:00～23:00有一个小高峰,凌晨03:00～04:00达到最高峰。雄虫的趋光性明显高于雌虫,灯诱雌虫♀∶雄虫♂=1∶8.66。【结论】弧目大蚕蛾Neoris haraldiSchawerda分布于陕西、甘肃、新疆,在克拉玛依乌尔禾区主要危害胡杨,1年发生1代;以卵在胡杨当年枝条和树干上越冬,卵多数分布在东南方向的当年生枝条上;5月中下旬老熟幼虫多在树基周围落叶层下或枯草层内吐丝结茧化蛹;成虫趋光性强。

Research on Biological Characteristics of Neoris haraldi Schawerda

【Objective】The present study investigated the biologic character of Neoris haraldi Schawerda.【Method】The biologic character of Neoris haraldi Schawerda were observed by point investigation in forest and indoor.【Result】Neoris haraldi Schawerda distributed in Shanxi,Gansu and Xinjiang,it has in Karamay one generation annually and mainly damaged Populus in Wuerhe Nature Reserve.In each egg mass contains 3-33 grain and hatches in the middle ten-day period of April next year,it will last 180 d.Neoris haraldi Schawerda eggs stay around Populus branches and tree trunks in the egg stage at winter,eggs are majority located in the branches on current year of southeast direction.The larval stage will last about 38-40 d,the mature larvae spin,cocooning and pupate under defoliation layer around the base of tree or in the dull grass layer in middle ten-day period of May.Eclosion started in the middle ten-day period of September,adult will last 3-7 d.Adults have strong phototaxy,and there are two peak periods for inducing adults ,there is a small peak in 22:00-23:00 of Beijing time and the highest peak in 03:00-04:00 before dawn.The male phototaxy is higher than that of the female ,female light induced ♀∶male ♂ = 1∶8.66.