根白腐病(Fomes dnnosus) 由根白腐病菌引起的根腐朽和干腐朽,是英国幼龄和成龄针叶林的最严重的病害之一。该菌能造成松树枯死,特别是生长在干燥的或者PH值在6或6以上的碱性土上的松树。其它树种幼树也能受害致死,但较普遍的是造成根部的腐烂或通过根进入茎部,并产生一个范围较广的干基腐朽。根白腐菌的子实体常常出现在已死的寄主树根部或有病的树桩上。正在生长的子实体表面红褐色,边缘白色,下表面白色,有许多小 Fomes dnnosus Root rot and dry decay caused by the root rot are one of the most serious diseases of young and adult coniferous forests in the United Kingdom. The fungus can cause pine trees to die, especially pine trees that grow on dry soils or alkaline earths with a pH of 6 or above. Saplings of other tree species can also be lethal, but it is more common to cause root decay or root penetration into the stem and produce a wider range of dry-base decay. The fruiting bodies of the root white rot fungus often appear on dead tree roots or diseased stumps. The growing fruiting body surface is reddish-brown, with white margins and white underside, with many small ones