【摘要】 经分离培养、人工接种试验和林内定点观察研究结果证明Ｂｏｔｒｙｏｓｐｈａｅｒｉａｌａｒｉｃｉｎａ（Ｓａｗａｄａ）Ｓｈａｎｇ（落叶松葡萄座腔菌）是山西省华北落叶松人工林内落叶松枯梢病的病原菌。病原菌以子囊座和分生孢子器在枯梢和残留叶片上越冬，７月初开始发病，分生孢子在生长季节中可进行多次重复侵染。对落叶松枯梢病与生理性枯梢作了诊断技术要点更多还原

【Abstract】 Through isolating cultruing, inoculation experiments and field observation, it is verified that Botryospaeria laricina ( Sawadw) Shang is the pathogen of causing larch shoot bligt in man-made young growth of Larix principis-rupprechtii Mayr. in SHanxi province. The disease appears in early July.The pathogen overwinters as acostrom and pycnidium in diseaed shoots and dead needles. The conidia are able to infect the shoots and needles many times in growing season.The diagnostic main points of larch shoot blight and noninfectious top dry were discussed.更多还原