泡桐大袋蛾防治指标的研究

Study on controlling index of Clania variegata Snellen

本文通过测定大袋蛾（ＣｌａｎｉａｖａｒｉｅｇａｔａＳｎｅｌｅｎ）幼虫食量、泡桐蓄叶量、模拟危害损失量等试验得出：每头幼虫一生平均食叶量为３７８０～３９８０ｃｍ２，雌虫比雄虫高４０７％；７、８月份泡桐蓄叶量与胸径分别为Ｙ７＝０５３１９Ｄ１６９４９和Ｙ８＝１１３２７Ｄ１４１９９的幂函数回归关系；在模拟危害率３０％以下时，对当年泡桐生长无补偿作用，对翌年泡桐生长有补偿作用；７、８月份材损率与危害程度分别为Ｙ７＝０７２００Ｘ－００１７７和Ｙ８＝０７５７１Ｘ－００１４６的线性回归关系。根据我国泡桐大袋蛾防治方法技术水平的不同，提出了大袋蛾危害１５、２０、２５、３０、３５ｃｍ胸径泡桐时，采用人工注药的防治指标：百叶平均虫口分别为２８０、１７０、１１７、８５、６７头；采用飞机超低容量喷洒灭幼脲的防治指标：百叶平均虫口分别为１８８、１２４、９０、７０、５６头。

The study on eating capacity of Clania variegata Snellen larvae, leaf storation quantity of Paulownia and imitation of loss caused by the worms has been carried out.The results showed that the average eating capacity of a larva in its life is 378 0～398 0cm 3 and that the female ate 40 7% more than the male. The leaf storation and breast diameter of Paulounia in July and August met the power function regression relationship Y 7=0 5319D 1 6949 and Y 8=1 1327D 1 4199 respectively. When the imitating harm rate was less than 30%, it isn't compensatory for Paulownia grouth of the very year, but for the next year. The timber loss rate and injury extent in July and August have the following linear regression relationship:Y 7=0 7200X-0 0177 and Y 8=0 7571X-0 0146. According to various controlling technical levels in China, it was held that when the Clania Variegata Snellen jepodize the Paulownia with breast diameter15、20、25、30、35cm,the controlling index was the artificial injection of insecticide and the average worm number per 100 leaves were 28 0、17 0、11 7、8 5、6 7 respectively and as far as air spray of [WTBX〗Dimilin was concerned,they were 18 8、12 4、9 0、7 0、and 5 6 respectively.