桃蛀螟种群消长规律及其对核桃的危害

Population Dynamics of Conogethes punctiferalis and Its Harm to Walnuts

通过2016~2018连续3年灯诱监测,认为桃蛀螟Conogethes punctiferalis(Guenée,1854)在鲁西北地区1年发生4代,部分1年发生3代。越冬代、第1代、第2代、第3代成虫高峰期分别为在5月底6月初、7月上中旬、8月中旬、9月中旬。危害核桃的主要是第1代桃蛀螟,主要危害期在5月中下旬至7月上中旬。幼虫主要在果与果相接处和青果顶端侵入蛀食果肉和果仁,虫果率最高达40%以上。提出物理、生物和化学方法防治建议,喷药防治关键期应抓住第1代卵期和幼虫孵化期进行。

Conogethes punctiferalis(Guenée,1854)occurred four generations a year in Northwest Shandong,and some three generations a year according to three years of light trapping monitoring from 2016 to 2018.The peak periods of overwintering generation,first generation,second generation and third generation adults were in late May to early June,early and middle July,mid-August and mid September,respectively.The damage to Walnut mainly concentrated in the middle and late May to the early and middle July,which is the first generation of C.punctiferalis.The larvae invade the pulp and kernels mainly through the location of fruit-fruit connectionthe and the top of walnuts?fruits.The highest fruit-borer rate was more than 40%.Physical,biological and chemical control methods were suggested.Egg and larval hatching stages of the first generation were the key period of chemical control.