松梢螟(Dioryctria abietella Schiff)是危害松梢的主要害虫,在山东普遍发生,危害很严重。为了解其生活规律,给防治提供依据,作者于1959—1961年,在青岛崂山林场作了初步观察,现将所得资料整理如下。一、为害情况松梢螟主要为害松树顶棺,以10年生左右的松树受害最重。根据历年来在各地的调查了解,被害率一般为15—30%,严重者达70%以上。松梢被害后,郎枯萎折断,不能向上生长,翌年由被 Dioryctria abietella Schiff is a major insect pest of pine wilt, which is common in Shandong Province and endangered. In order to understand its law of life and to provide the basis for prevention and treatment, the author made a preliminary observation in Qingdao Laoshan Forest Farm from 1959 to 1961. The data obtained are summarized as follows. First, the damage situation Pine head borers mainly pine top coffin, 10 year-old pines most affected. According to the surveys conducted throughout the years, the rate of victimization is generally 15-30% and in severe cases it is more than 70%. Pine shoots were killed, Lang wilt broken, can not grow up, by the next year