大豆细菌性疫病是大豆主要病害之一,广泛分布于我国大豆产区;欧、美及亚洲的一些国家也有发生。据报道,在适宜发病的条件下,本病危害可引致大豆减产18—22%。 染病种子病斑为浅灰或浅褐色,有的种皮稍皱缩。子叶上病斑为半圆或近圆形,褐角至黑色,周围呈水渍状。真叶受害,初为褪 Soybean bacterial blight is one of the main diseases of soybean, widely distributed in China’s soybean producing areas; some countries in Europe, the United States and Asia have also occurred. It is reported that under the conditions of suitable incidence, the harm of this disease can lead to 18-22% reduction of soybean yield. Lesions of diseased seeds are light gray or light brown, and some are slightly shriveled. Cotyledons on the lesion is semicircular or nearly circular, brown to black, surrounded by water-like. True leaves victims, initially fade