梨小食心虫,简称梨小,又名桃折心虫,以幼虫蛀食梨、桃、苹果的果实和桃树新梢。梨小一年发生4代,1、2代主要危害桃梢(4月下旬～7月下旬),3、4代主要危害桃及梨的果实(7月下旬至采收),一头幼虫能危害2～3个桃梢。由此,应抓好前期桃稍的防治,避免果实受害,可采用如下方法: 一、药剂防治于4月下旬,进行桃 Pear small heart worms, referred to as small pears, also known as peach peach insects, eating pears eaten pear, peach, apple fruit and peach shoots. Pear 4 times a year, 1,2 generations of major pests (late April ~ late July), 3,4 major pests and pears endanger the fruit (late July to harvest), a larvae can harm 2 to 3 peach shoots. Therefore, we should do a good job early peach prevention and control, to avoid fruit damage, the following methods can be used: First, the chemical control in late April, for peach