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松针褐斑病为Scirrhia acicola所引起,影响长叶松(Pinus palustris)生长,并可致死.该病使美国南方松林年生长量减少达453000立方米以上,直播长叶松在草丛阶段受害最重,即使其不能开始旺盛的高生长,严重感病植株可延续草丛阶段达10年以上.褐斑病目前已成为部份松类包括欧洲赤松(P.sylvestris)生产一个严重障碍,在美国北部及中部各州,栽植用作圣诞树的松树,由于该病引起落针,失去了圣诞树的商品价值,每年损失达几千美元.
Pine needle brown spot is caused by Scirrhia acicola, which affects the growth of Pinus palustris and can be lethal.The disease caused more than 453000 cubic meters of annual growth of Pinus thunbergii forest in the United States, Even if it does not begin to thrive, severely infected plants can extend the brushing stage for more than 10 years. Brown blotch has now become a serious hurdle for part of the Pinus, including P.sylvestris production in the northern part of the United States and The Central States, which planted pine trees used as Christmas trees, lost their merits of thousands of dollars a year due to the disease causing needle drop and loss of the value of the Christmas tree.