近日,记者从河南省森防站获悉,2011年全省主要林业有害生物将呈偏重发生态势,发生面积约987万亩,发生率约12.54%。杨树蛀干害虫发生情况稳定杨树蛀干害虫主要种类为桑天牛、光肩星天牛、白杨透翅蛾等,其中桑天牛和光肩天牛较多,分布全省各地。预计,杨树蛀干害虫发生面积62万亩,发生率4.3%,同比略有下降。杨树食叶害虫将继续保持高发态势杨树食叶害虫主要种类有杨小舟蛾、杨扇舟蛾、杨白潜蛾、杨黄卷叶螟、春尺蠖、杨扁角叶蜂、黄刺蛾、 Recently, the reporter learned from the Forest Prevention Station in Henan Province that in 2011, the main forestry pests in the province will show a tendency of partial heaviness with an area of ​​about 9.87 million mu and an incidence rate of 12.54%. Poplar stem borer pest incidence is stable Poplar stem borer pests main types of mulberry, light Shouldered Aster, poplar moth and so on, of which mulberry and light shoulder more cattle, distributed throughout the province. Expected to poplar bore pest occurrence area of ​​62 acres, the incidence rate of 4.3%, a slight decline year on year. Poplar leaf insect pests will continue to maintain a high incidence of poplar leaf insect pests Main types are Yang Xiaotan moth, Yang Fan moth, Yang white moth, Poplar, Populus davidiana, Poplar horn bee, yellow thorn moth,