大豆锈病Phakopsora pachyrhizi是七十年代开始流行的一种新病害,遍及东半球,我国南方秋大豆是重灾区。据报导发病始期各地不一:广东高州县(北纬22度)在3月下旬;湖北孝感县(北纬31度)在9月中、下旬。先南后北,与纬度相关。大约北纬每升高一度, Soybean rust Phakopsora pachyrhizi is a new disease prevalent in the seventies. It spreads throughout the eastern hemisphere. Autumn soybean in southern China is the hardest hit. It is reported that the onset of the disease varies from place to place: Gaozhou County of Guangdong (latitude 22 degrees north) in late March; Xiaogan County of Hubei (31 degrees north latitude) in mid-September, late. South first, north, and latitude. About an increase of latitude once,