Plant-diseases, insect-pests plague forest land
More than 20 kinds of plant diseases and insect pests are threatening large stretches of forest land in 11 cities and counties in Northwest China's Qinghai Province.The pest plague is so widespread
More than 20 kinds of plant diseases and insect pests are threatening large stretches of forest land in 11 cities and counties in Northwest China's Qinghai Province.The pest plague is so widespread