White sesame wilt disease control technology

In the production, white sesame wilt is very common, and has a serious impact on its yield and quality. Its disease characteristics and prevention techniques are as follows: I. Onset conditions White sesame wilt is mainly caused by excessive soil moisture in the field. The pathogenic bacteria survived in the soil with the diseased plant residue and was transmitted by running water or agricultural operations. The continuous crop is even more severe. Peak incidence, often in hot July to August, after a heavy rain, the temperature suddenly rises, the disease is prone to occur and popular. Second, the risk of symptoms of white sesame wilt, a bacterial disease, the roots of plants outside the disease, was dark brown stripe, the internal vascular brown, overflowing bacteria overflow, dry and become bright black particles. At the early stage of disease, the diseased plant resembled a lack of water, wilted during the day and returned to normal at night. After a few days, the leaves fell from the top, wilted, the old leaves hanged, and the whole plant died. After the onset of the leaves, the veins were dark green and streaked, sometimes criss-cross, meshed, and light-seeing. The center was oily. After the damage, the fruit was spotted with water-stained lesions, and gradually became dark brown with different thickness and striae, which caused the sickness to shrink and make the seeds lose weight and lose their ability to germinate. III. Prevention and Control Techniques (I) Agricultural Control 1. Select disease-resistant varieties and go with non-solanum and non-legume crops for three years. 2. White sesame seeds are not resistant to water stains. During the period of growth and development, if there are heavy rain, heavy rain, or water accumulation in the field, they should be promptly removed so that there is no accumulation of water in the rain. 3. Increase organic fertilizers, especially potassium fertilizers. 4. Remove, destroy or bury diseased plants in time. (II) Chemical control 1. Disinfect the diseased hole with 1 part of lime water and 15 parts of lime powder. 2. Soil treatment with chlorothalonil before sowing has better preventive effect; or in the early stage of disease, spray 50% carbendazim WP 800 to 1000 times or 3% cresol per acre The phenol 50 ml plus 50% carbendazim 100 grams, 50 kg sprayed.