1974年,在美国佐治亚州的宝谷桃区,发现有桃树流胶病(Botryosphaeria dothidea)的大量漫延。这种新的树皮病严重危害了该地的大量桃树。近来,在南方的各州也出现了这种病害。流胶病的特点是在树干、主枝和小枝上凝积着大量的树胶。重病树生长变弱,直至死亡。流胶病为害穗醋粟、苹果、扁桃和越桔的叶梗 In 1974, there was a lot of spread of Botryosphaeria dothidea in the Po Valley district of Georgia, USA. This new bark disease has seriously jeopardized the large number of peaches in the area. Recently, the disease has also appeared in the southern states. Silicosis is characterized by the accumulation of gums on the trunk, main branches and branchlets. Severe tree growth weakened until death. Silicone-induced spike vinegar millet, apple, almond and blueberry leaf stems