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我区是森林病虫害比较严重的地区,虫害种类复杂,年发生代数多,发虫面积大,损失比较严重。据1978年至1987年统计,森林病虫害最高年累计发生663.4万多亩,最低年发生319.6万多亩,十年平均年发生503.7万多亩.为了有效地防治森林病虫害,有52个县、市和11个区直国营林场,开展了病虫害预测预报工作,设测报点390个,有测报员、虫
My area is more serious pests and diseases in the forest areas, pests species complexity, annual occurrence of algebra, hair worm area, the loss is more serious. According to the statistics from 1978 to 1987, the highest incidence of forest pests and diseases occurred in a total of 6.634 million mu, with the lowest annual incidence of 3.196 million mu and the average annual occurrence of 5,047,000 mu in ten years.In order to effectively control forest pests and diseases, 52 counties and cities And 11 districts directly under the state-run forest farms to carry out the prediction of pests and diseases work, set the test report 390 points, a messenger, insects