摘要
芦毒蛾是危害荻的主要害虫之一．１９９１和１９９３年在沅江市万子湖苇场进行罩笼接虫试验的结果表明，不同虫口密度对荻生长及产量有显著影响．根据产量损失率的测定，确定了芦毒蛾的经济受害允许损失水平为５．７５％；由此得出洞庭湖区第一代芦毒蛾的防治指标为：每株荻４．３头芦毒蛾幼虫．
Laelia coenosa(H bner)is one of chief insect pest
silver grass Miscanthussacchariflorus.Experiments were conducted in 1991 and 1993 in the
reed field of WanziLake of yuanjiang county respectively.The enveloping test indicates that the
effects on differ-ent larvae population are significant for growth and yield in silver grass
Miscanthus sacchariflorus.The economic injury level is 5.75% on the bases of determination of
yield lossrates.According to the experimental result,the control action threshold of first
generationis developed as 4.3 larvae/plant in silver grass Miscanthus sacchariflorus of
Dongting Lakeregion.
基金
益阳地区立项的协作研究课题
关键词
禾本科
毒蛾属
防治
荻
芦毒蛾
gramineae
euproctis
preventive treatment/Miscanthus
sacchariflorus
Lealia coenosa
