近期来自国家林业局的消息称,2013年全国主要林业有害生物仍将呈现偏重发生态势,全年发生面积将达1.83亿亩,发生面积同比增加,危害程度加重,外来有害生物呈扩散态势。其中,美国白蛾发生面积和疫点数量将有所增加,发生面积同比明显上升。疫情将向山西、吉林、内蒙古扩散,夏、秋季节将在河北、辽宁、山东、河南等地局部成灾,在天津有所反弹,山东发生面积会有所上升,在河南扩散加剧,在江苏北部地区扩散蔓 Recent news from the State Forestry Administration said that in 2013 the country’s major forestry pests will continue to be prevalent, the annual area will reach 183 million mu, the area increased year on year, increasing the degree of harm, exotic pests spread. Among them, the occurrence area and epidemic spot number of American white moth will increase somewhat, the area of ​​occurrence obviously rises compared to the same period of last year. The epidemic will spread to Shanxi, Jilin and Inner Mongolia. The summer and autumn seasons will be endemic in parts of Hebei, Liaoning, Shandong and Henan, and will rebound in Tianjin. The area will rise in Shandong and the spread in Henan will intensify. In Jiangsu The northern region spread vine