樟子松木蠹象主要危害樟子松枝和主干。在长春地区 ,1a发生一代 ,以成虫在枯枝落叶层下浅土层内和树皮裂缝内越冬。第 2年 4月下旬越冬成虫开始活动 ,5月中旬开始产卵 ,高峰期 5月下旬 ;孵化高峰期为 6月上旬 ;6月下旬化蛹 ,高峰期为 7月上旬 ;7月上旬羽化 ,高峰期为 7月中旬。卵期平均 14d,幼虫期平均 34 d,蛹期平均 12 d,成虫期长达 30 0～ 330 d;幼虫分 6个龄期。 Pinus sylvestris var.mongolica main hazards Pinus sylvestris and trunk. In Changchun, a generation occurs in 1a, where adults become wintering in shallow soil under the litter layer and bark cracks. In the second year of April, the overwintering adult began to act in mid-May, spawning began in mid-May, and the peak was in late May; the peak of hatching was in early June; the pupation in late June was peak in early July; the emergence in early July, Peak for mid-July. The average egg number was 14 days, with an average of 34 days in the larval stage and an average of 12 days in the pupal stage. The adult stage was 30 to 330 days. The larvae were divided into 6 stages.