摘要：The ragweeds, especially Ambrosia trifida L., have become widespread and difficult to control in th...The ragweeds, especially Ambrosia trifida L., have become widespread and difficult to control in the Shenyang area. A recent investigation of natural enemies of the harmful weeds resulted in the finding of Puccinia xanthii Schwein. f. sp. ambrosiae-trifidae S.W.T. Batra in China. The rust spreads rapidly, causing serious disease and showing a great potential of biocontrol to the weed.显示全部
