The ceo-geographical division of forest insects in China is generally divided into 4 levels: region, subrcgion, area and province. The region is formed by isolation of ocean, high mountain and desert etc. The division...The ceo-geographical division of forest insects in China is generally divided into 4 levels: region, subrcgion, area and province. The region is formed by isolation of ocean, high mountain and desert etc. The division of subrcgion is on the basis of resistance of extreme temperature humidity in winter. The division of area or province is on the basis of landform, type of vegetation in forest zone and temperature zone.展开更多
文摘The ceo-geographical division of forest insects in China is generally divided into 4 levels: region, subrcgion, area and province. The region is formed by isolation of ocean, high mountain and desert etc. The division of subrcgion is on the basis of resistance of extreme temperature humidity in winter. The division of area or province is on the basis of landform, type of vegetation in forest zone and temperature zone.