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据全省森林病虫鼠害测报网对2001年冬季各种害虫越冬基数调查监测,结合近年病虫鼠害发生情况和气象部门提供的气候因素分析,预计2002年全省森林病虫鼠害发生面积将在490万亩左右,较2001年有所下降。灾情重点是红脂大小蠹、松毛虫、杨树蛀干害虫、美国白蛾、落叶松叶蜂类和杨树食叶类害虫等。 (一)松毛虫:预测2002年发生面积为105万亩,其中严重发生25万亩,中等30万亩,轻微的50万亩。严重发生面积与2001年相当。燕山山区局部地区虫情稳中有降,太行山山区的虫情危害与今年相当,但冀北坝上地区的落叶松毛虫上升趋势明显。主要发生地区为,承德市围场、平泉、隆化、滦平、兴隆、承德等县,特别是塞罕坝机械林场;秦皇岛市青龙县;张家口市赤城、尚义县,保定市涞源、唐县、阜平、易县;石家庄市的平山、灵寿、行唐等县,需防面积55万亩。
According to the survey and monitoring of winter pest overwinters base on the 2001 winter in Pest Insects and Pests Report of the province, combining with the occurrence of pests, pests and diseases in recent years and the climatic factors provided by the meteorological department, it is estimated that in 2002, The area will be around 4.9 million mu, down from 2001. The focus of the disaster is Betula platyphylla, pine caterpillars, poplar borer pests, the American white moth, larch leaf bee and poplar leafy insects. (I) Dendrolimus: An area of 1.05 million mu will be predicted in 2002, of which 250,000 mu will be seriously affected, 300,000 mu will be medium and 500,000 mu will be slightly affected. The area of serious occurrence is comparable with 2001. The insects in some areas of Yanshan Mountain have a steady decline, but the insect damage in the Taihang Mountain area is quite similar to that of this year, but the upward trend of Larix sylvatica in Bashang area of Hebei Province is obvious. The main areas are: Chengde Yard, Pingquan, Longhua, Luanping, Xinglong, Chengde and other counties, especially the Saihanba Machinery Forest Farm; Qinhuangdao Qinglong County; Zhangjiakou City Chicheng, Shangyi County, Baoding Yuyuan, Tang County, Fuping, Yi County; Shijingshan City, Shijiazhuang City, Ling Shou, Tang and other counties, need to prevent 55 acres of area.