今年6月,美国威斯康星大学植病教授斯莫里博士在林业部、新疆维吾尔自治区林业厅有关人员陪同下,对新疆部分地区近年来出现大面积榆树枯死现象进行了考察。 这次考察活动主要在北疆的部分榆树分布区,共4个地市,7个县,近20个点村进行。大面积榆树枯死主要集中在平原地区人工林,也有少数发生在天然次生林,而山区的天然林 In June this year, Dr. Somly, a professor of plant diseases from the University of Wisconsin, accompanied by officials from the Ministry of Forestry and the Xinjiang Uyghur Autonomous Region Forestry Department, conducted a survey on the phenomenon of withered large area elm trees in some areas of Xinjiang. The survey mainly in part of northern Elm distribution area, a total of 4 cities, 7 counties, nearly 20 villages. Large areas of elm dead mainly concentrated in the plain plantations, there are a few occur in the natural secondary forest, and mountainous natural forest