First, the symptoms of sesame stem blight mainly damage the sesame roots, stems and pods. The seeds and buds can cause rotten and rotten buds in the soil. The young buds and young roots turn brown after they become sick. Black sclerotia and black spots are produced on them and the seedlings are wilted and dead. In adult plants, the roots and stems are susceptible and the plants are short. The leaves gradually turn yellow from bottom to top and curl upwards. The plants often die. After the damage to the base of the stem, the lesion was brownish and immersed in water, with no obvious boundary. The central part of the disease was grayish and shiny in the middle of the disease, and many dark spots appeared on it. The epidermis was torn off, dense black bacteria were found in the cortex and pith, and the pith was hollow and easy to fold. The pods turn brown and dead and covered with black granules. After the root damage became brown, tearing the root epidermis, internal dense bacteria nucleus, was black and gray. Second, the control method with 1:1:150 Bordeaux mixture and 0.5 Baume degrees of lime sulfur spray, control effect is better.
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