近年来我国林草有害生物灾害发生状况分析

Analysis on the Occurrence of Forestry and Grassland Bio-disaster in China in Recent Years

目前我国林草有害生物灾害呈现扩大趋势,草原有害生物灾害发生面积年均约为林业的4倍以上。近年来,我国林草有害生物灾害防治费用年均在50亿元以上。西藏、内蒙古、青海、甘肃、新疆等地是我国草原有害生物灾害发生的重灾区,草原鼠兔害是草原有害生物的主要灾害,每年鼠兔灾害发生面积超过有害生物灾害总面积的70%以上,2021年我国的草原有害生物发生面积防治率为26.6%,与林业有害生物防治率相比还处于较低水平。新疆、内蒙古和四川等地是我国林业有害生物灾害发生的重灾区,林木虫害是林业有害生物的主要灾害,其次是林木病害、鼠兔害和有害植物,2021年我国的林业有害生物发生面积防治率超过80%以上。

At present,the trend of forestry and grassland biological disasters in China based on pest was expanding explosively,and the annual occurrence area of pest disasters in grassland was more than 4 times that in forestry.In recent years,the annual cost in pest control of forestry and grassland was more than 5 billion yuan.Forestry and grassland biological disasters were more serious in Tibet,Inner Mongolia,Qinghai,Gansu,Xinjiang and other places in China.Rat and rabbit damage was the main pest disaster in the grassland.The annual area which was harmed by rats and rabbits exceeded 70%of the total area of pest disasters,in 2021,the occurrence area in pest control of forest and grass was 26.6%,compared with forestry pest control rate was still at a low level.Xinjiang,Inner Mongolia and Sichuan were the most affected areas of forest pest disasters in China.Insect pest in wood of forest was the main disaster of forestry pest,followed by forestry tree disease,rat and rabbit disaster and harmful plants,in 2021,the prevention rate of forestry pest occurrence area will exceed 80%.