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桃小食心虫的老熟脱果幼虫,一般是在树冠下、树干周围1.5尺范围内,1～4寸深的土壤中,作扁圆形虫茧越冬。来年春末、夏初,当10厘米深的土壤温度达到15℃以上时,迂有降雨(山丘地砾质壤土降雨量为10毫米)时,就会由越冬茧中爬出,到地面上作纺锤形茧化蛹。再经过半月左右的时间,茧中的蛹就会羽化为成虫。羽化后的成虫,经过交尾之后,就会飞到树上,在果实上产卵,孵化为幼虫后蛀害果实。幼虫在果内发育老熟后,由果中脱出,再掉落到地面上作茧化蛹,重复前一个世代的过程。由于桃小食心虫具有以上危害特点,所以,在越冬幼虫出土前,和老熟幼虫脱果前,在地面上撒施具有触杀作用的药剂,就能有效地杀死茧中的幼虫、出土幼虫,和初孵化的成虫。因此,搞好地面防治,就成为桃小食心虫综合防治中的重要组成部分。
Peach mungbean mature off fruit larvae, usually under the canopy, within 1.5 feet around the trunk, 1 to 4 inches deep in the soil, for the oval winter cocoon. In late spring and early summer of next year, when the soil temperature of 10 centimeters deep reaches above 15 ° C, rainfall (the rainfall of 10 mm on the gravel loam in the hills) will climb out of the winter cocoon and reach the ground For spindle-shaped cocoon pupation. After about half a month or so, pupae in the cocoon will emerge as adults. After the emergence of adult worms, after mating, it will fly to the tree, spawning in the fruit, hatch after larvae moth damage fruit. Larvae mature in the fruit after aging, the prolapse from the fruit, and then dropped to the ground for cocoon pupation, the process of repeating the previous generation. Because peach moth beetles have the above characteristics of harm, so before the overwintering larvae unearthed, and the mature larvae detached before the application of a contact agent on the ground with the role of contact, you can effectively kill cocoons larvae, unearthed larvae, And first hatched adults. Therefore, doing a good job in the prevention and control of the ground will become an important part in the comprehensive prevention and control of peach moth.