俄国出口原木上的病虫害目前美国西北部许多木材厂面临国内原木供应紧张的窘境，过去三年来一些木材公司对从西伯利亚和俄罗斯远东地区进口原木很感兴趣，因为那里的软材材质好，价格低廉。考虑了多个树种，最后选中了落叶松。１９９０年美国林务局和科研机构曾在两起从西... Pests and Diseases in Russia’s Log Exports Many timber mills in the northwestern United States are facing a shortage of domestic logs, and some timber companies have been interested in importing logs from Siberia and the Far East of Russia for the past three years because of good soft materials and low prices . Considered a number of species, the final selected larch. In 1990 the United States Forest Service and research institutes in two from the West ...