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1991年8月,浙江宁波象山县丹城镇附近松林的马尾松和黑松发生了零星死亡。症状是:病树的针叶在6月份出现黄化迹象,到7月份,部分黄化针叶转为褚红色。濒死的松树树冠,可见到绿色、灰绿色、黄色、褚红色针叶同时存在现象;后期,病树针叶全部转为褚红色。树皮上可见到许多天牛产卵留下的“刻槽”,剥开树皮可见到尚未蛀入木质部的天牛幼虫。解剖木质部,手感干燥,无流脂出现。我们锯取部分濒死黑松和马尾松木质部,在室内分离镜检,发现了松材线虫。1991年9月,请南京农业大学程瑚瑞教授作进
In August 1991, sporadic deaths occurred in Pinus massoniana and Pinus thunbergii near the pine forest near Dancheng Town, Xiangshan County, Ningbo, Zhejiang Province. Symptoms are: sick tree coniferous signs of yellowing in June, to July, part of the yellow conifer into Chu red. Dying pine crown, you can see the green, gray-green, yellow, Chu red needle at the same time the phenomenon; later, the sick tree needle all turned Chu red. Many barks can be seen on the bark leaving behind the “notch”, peeled bark can be seen have not eaten into the xylem larvae. Anatomy xylem, feel dry, no fat appears. We saw part of dying pine and Pinus massoniana, microscopic examination indoors and found pine wood nematode. In September 1991, invited Professor Cheng Huurui of Nanjing Agricultural University to make progress