豫南板栗林栗皮夜蛾的生物学特性和防治研究

豫南板栗林栗皮夜蛾1年发生3代.以老熟幼虫在落地栗蓬刺束间或树皮裂缝中结茧化蛹(化蛹于白色丝茧中)越冬,或以幼虫在被害栗蓬总苞内越冬.第1代幼虫于6月上旬开始为害,6月下旬为第1代成虫盛发期.第2代幼虫在7月初孵化.化蛹场所高度集中在原被害蓬上.第1、第2代为害板栗较重,第3代为害较轻.豫南丘陵板栗产区采用农业和生物方法防治该虫,6年防治实验表明,该方法平均株杀灭效果可达90%.

Biology Characteristic and Controlling Research of Chinese Chestnut Characoma ruficirra in South Henan

Chinese chestnut Characoma ruficirra South Henan has three generations in out year.In falls to the ground the chestnut burr thorn by the old ripe larva to tie once in a while in the bark crack to spin a cocoon the pupation(pupation in white silk cocoon) to survive the winter,or in is killed in the chestnut burr involucre by the larva to survive the winter.The 1st generation of larva starts doing ill at the beginning of June,and the end of June sends the good time for 1st generation of adult of Characoma ruficirra.The 2nd generation of larva hatches from eggs at the beginning of July.The pupation place high degree of concentration originally is being killed on loosely.The 1st and 2nd generation damages the Chinese chestnut seriously,and the 3rd generation damages lightly.The agriculture and chemistry auxiliary were used to prevent and control this insect in production of Chinese chestnut in south of henan.Six years of experiment of preventing and controlling study showed that the average of this method to kill the insect could reach 90%.