天山阿勒泰山林区的主要树种西伯利亚落叶松(Larix sibirica)、雪岭杉(Picea schren-kiana)、西伯利亚云杉(Picea obovata)以及匍匐的小灌木新疆圆柏(Juniperus sabina)上普遍感染有落针病(又名散斑病),其中以西伯利亚落叶松、雪岭杉、西伯利亚云杉为最。西伯利亚落叶松受害严重的地区,树叶变黄枯死,远远望去好似火烧一样,受害率达99.7—100％。 Larix sibirica, Picea schren-kiana, Picea obovata, and creeping shrub Juniperus sabina, the main tree species in the Altay Mountains of Tianshan, are generally infected with drop needles Disease (also known as speckle disease), of which Siberian larch, snow ridge fir, Siberian spruce is the most. Siberian larch severely affected areas, the leaves turn yellow dead, from afar like a fire, the victim rate of 99.7-100%.