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由松针褐斑病菌Lecanosticta acicola(Th(?)m)sydow引起的松针褐斑病在我国南方引种的国外松林中为害严重,1982～1983年在福建沙县官庄林场的研究表明,病菌在病叶及病死叶中越冬,分生孢子只有在雨天才能释放。但日降雨量低于1.7mm时也不能释放。用人工模拟降雨淋洗病叶时,不论雨势大小和病叶上孢子形成的数量如何,都以淋洗开始15～30min时孢子释放量最大,1h后急剧减少,2h后继续缓慢下降。1983年3～11月,每隔5天采集感病湿地松针叶,用人工模拟降雨(6mm/h)淋洗30min,计算淋洗雨水中孢子数,结果表明在湿地松林分中,试验时间内病叶上都有孢子形成,但以4月下旬至5月中旬为最多,9～10月较多。分生孢子的寿命较短,在载玻片上室温下不超过45d,在5℃下不超过70d。
Pine needle brown spot caused by Lecanosticta acicola (Th (?) M) sydow was seriously devastated in the pine forests introduced abroad in southern China. Studies in Guanzhuang Forest Farm in Shaxian County of Fujian Province from 1982 to 1983 showed that the pathogen And dead leaves in the winter, conidia can only be released in rainy days. However, the daily rainfall below 1.7mm can not be released. When artificial leaves were used to simulate rains, the amount of spores released was the highest at 15 ~ 30min after rinsing, no matter the amount of rain and the number of spores formed on diseased leaves. After 1h, the amount of spore released sharply, and then decreased slowly after 2h. From March to November 1983, the needles of P. elliottii were collected every 5 days. The artificial rain (6 mm / h) was used for rinsing for 30 minutes to calculate the number of spores in the raining rainwater. The results showed that in the Pinus elliottii forest, Sick leaves are spore formation, but in late April to mid-May for the most, 9 to October more. Conidia have a short life span of not more than 45 days at room temperature on glass slides and not more than 70 days at 5 ° C.