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芝麻叶枯病是芝麻的常见病,从幼苗开始直至收获期,都会发生危害。危害症状,初期在叶片表面生紫褐色小点,逐渐扩大至叶脉,成为多角形病斑。斑块褐色浓淡不匀,隐约可见同心轮纹。发病严重时,所有叶片枯干,致使全株枯死。虽近似斑点病,但有明显区别(斑点病病斑较小,中部灰白色、外围茶褐色,全斑有蛇眼状斑纹,后期大部落叶)。叶枯病病斑受叶脉局限,多呈多角形,与叶脉接近处为紫黑色,整斑褐色,且不落叶。
Sesame leaf blight is a common disease of sesame seeds, from the seedlings until the harvest period, will be harmed. Harmful symptoms, early in the leaf surface purple brown spots, gradually expanding to the veins, a polygonal lesion. Plaque brown uneven, vaguely visible concentric wheel pattern. Serious disease, all leaves withered, resulting in whole plant dead. Although the approximate spot disease, but there is a clear difference (spot lesion lesser central gray, brown outer periphery, the whole spot snake eye-like markings, late large leaves). Blot lesions by the limitations of the veins, mostly polygonal, and veins close to the purple black, whole spot brown, and does not deciduous.