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李小食心虫,群众叫“杏蛆”。它以幼虫蛀食杏、李、桃等核果类果实。第一代为害杏、李幼果,造成果实早期脱落;第二代为害膨大期果实,使果实内虫粪充塞不能食用。该虫在雁北各地均有发生,近年来为害加重。因此,防治李小食心虫是保证李、杏丰收的关键之一。李小食心虫在雁北一年发生2—3代,以二代老熟幼虫在表土内结茧越冬。翌年4月下旬开始化蛹.5月上旬开始羽化,5月
Li Xiaogong worms, the masses called “Apricot maggot.” It larvae eaten apricot, plum, peach and other stone fruit. The first generation apricot, Li young fruit, causing the fruit early fall off; the second generation of fruit damage swollen period, the fruit stuffed fecal stuffing can not eat. The insects have occurred in all parts of Yan North, increased damage in recent years. Therefore, the prevention and control of Li Xiao worms is one of the keys to ensure the harvest of plums and apricots. Li Xiaogong worms occurred in Yanbei 2-3 years a year to second generation of mature larvae in the topsoil cocoon overwintering. In the following year, pupation begins in late April and begins to emerge in early May, May