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1发生规律和习性该虫一年发生一代，以蛹在树冠下上中越夏越冬。翌年2月底、3月初当地表5～10cm深处温度在0℃左右时，成虫开始羽化出土；3月上、中旬见卵；3月底4月初，树干阳面的幼虫孵化；5月上旬老熟幼虫入土化蛹。蛹期达9个多月。根据当年的气候，各虫态出现期早晚相差一?
A regular occurrence and habits of the pest generation occurs a year, with pupae under the crown in the summer and winter. At the end of February and early March of the following year, adults begin to emerge eclosion when the depth of 5 ~ 10cm in the local surface is about 0 ℃. Eggs are found on the upper and middle of March in March; larvae hatch on the sun-tree trunk in late March and early April; Inhabited pupae. Pupal up to 9 months. According to the year’s climate, the emergence of the early and late emergence of a different one?