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落叶松枯梢病是近几年在烟台市区落叶松人工林中,发生的一种危害甚大的真菌病害。树木染病后,造成枯梢,生长不良,树冠呈扫帚状,以至死亡。我们为了尽快模清该病的发生规律和防治方法,进行了全面的调查,1979年—1981年又在昆嵛山林场对此病进行了观察研究和防治试验,现将三年来的研究情况总结如下。 一、分布及危害 据调查,该病在烟台市的蓬莱县、招远县、荣成县、栖霞县、海阳县和昆嵛山林场的落叶松林中都有发生,受害面积达26410亩。昆嵛山林场的六个林区中均有发生,其中三林区荒岭口的300亩落叶松被害最重,发病率达100％,感病指数45.5。
Larch blight is one of the most harmful fungal diseases in the larch plantation in Yantai City in recent years. After the tree disease, resulting in shoots, poor growth, the crown was broom-like, and even death. In order to clarify the occurrence and control of the disease as soon as possible, we carried out a comprehensive survey. From 1979 to 1981, we observed and studied the disease in Kunyu Mountain Forest Farm. Now we summarize the research in the past three years as follows. First, the distribution and harm According to the survey, the disease in Yantai Penglai County, Zhaoyuan County, Rongcheng County, Qixia County, Haiyang County and Kunyu Hill forest larch forests have occurred, the victim area of 26410 acres. Among the six forest areas in Kunyu Mountain Forest Farm, 300 mu of larch was severely damaged in Sanlin District, with a disease incidence of 100% and a susceptible index of 45.5.