Abstract:

Abstract Four representative samples of corn southern leaf blight were collected from main sweet corn area in Guangdong province. According to these samples，a race identification of isolated Bipolaria maydis strains was made based on surface morphology of spore through scanning electron microscope and race biological characteristics. Results showed that spore of these four samples were coincidence with Bipolaria maydis race “O” in the aspect of morphology and biological characteristics, suggesting that all of Bipolaria maydis physiological race in Guangdong province were probably belonged to race “O”.