主要症状芝麻青枯病属细菌性病害,在各芝麻产区都有发生。发病初期,茎部出现绿色病斑,后变为黑色条状病斑。叶片自上而下突然萎蔫,下部老叶挂垂,傍晚尚能恢复正常,反复3～5天时整株呈青色枯死。受害植株比健株矮小,根部和茎部维管束变褐,最后蔓延到髓部,造成空胴,茎内外有菌胶溢出,逐渐变为漆黑晶亮的颗粒。叶片发病后,叶脉呈墨绿条斑,有时纵横交错,结成网状,迎光透视,其中心呈油渍状。蒴果受害后呈水渍状病斑,并且逐渐变成深褐色粗细不同的条斑,使病蒴瘦缩,进而使种子瘦瘪,失去发芽能力。 Sesame Wilt is a bacterial disease, occurring in all sesame producing areas. Early onset, the stem appeared green lesions, after becoming black strip lesions. The leaves suddenly wilting from top to bottom, the lower part of the old leaves hanging down, still able to return to normal in the evening, repeatedly 3 to 5 days the whole plant was cyan dead. The harvested plants were shorter than the healthy plants, the vascular bundles in the roots and stems turned brown, and finally spread to the pith, resulting in empty bodies and spores of the stems that spilled out inside and outside the stems and gradually turned into dark, bright particles. After the onset of leaves, veins dark green streaks, and sometimes criss-cross, mesh formation, Ying Guan perspective, the center was a kind of oil-like. After the injury of the capsule was water stain-like lesions, and gradually become dark brown different thickness of the streaks, so sick bolt thinning, leaving the seed thin deflated, the loss of germination.