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油松,强阳性树种,喜光、耐旱、耐寒,耐瘠薄,树干挺拔苍劲,四季常青。树形优美。不仅是我省荒山造林的好树种,而且也是我省园林绿化的优良树种。但近年来油松散斑病蔓延广,为害严重,如西宁市和东部农业区均有发生,轻者影响树木生长,重者可使胸径20厘米的树木死亡。由于此病没有得到控制,从而大大挫伤了群众利用油松造林和园林绿化的积极性。现着重谈谈此病特征及其防治方法。
Pinus tabulaeformis, strong positive species, like light, drought, cold, barren, trunk vigorous vigorous, evergreen. Beautiful tree. Not only good afforestation in the province of barren hills species, but also our province excellent landscaping tree species. However, in recent years, P. tabulaeformis spreads extensively and is seriously devastating. For example, Xining City and the eastern agricultural areas have occurred. The light tree affects the growth of trees. In severe cases, trees with a diameter of 20 cm can die. As the disease has not been controlled, which greatly dampened the enthusiasm of the masses to make use of pine plantation and landscaping. Now talk about the disease characteristics and prevention methods.