Ginger disease, also known as rot or bacterial wilt, is the most common devastating disease in ginger production. Onset fields generally reduce production by 20% to 30%, serious to 80%, or even no harvest. The disease is a kind of bacterial disease. The pathogenic bacteria can spread through ginger, soil and fertilizer. In production, comprehensive prevention and control strategies based on agricultural technical measures and supplemented with chemical control should be adopted to prevent and control them as soon as possible.
1. Carry out a change of rotation. Since the pathogens of ginger borer can survive in the soil for more than two years, crop rotation is an important way to cut off soil bacteria. Especially for plots that have already been affected, they must be planted more than two to three years apart. The former depressions for planting ginger should be new depressions or planted food crops, onions, garlic sprouts, etc. To plant tomato, eggplant, pepper, potatoes and other solanaceous crops, especially those where bacterial wilt occurs, it is not appropriate to grow ginger.
2. Choose to leave disease-free ginger seeds and disinfect. Choose disease-free, pest-free, and no-wound from the disease-free ginger, neat shape, bright color, hypertrophy, good ginger buds for seeding. Ginger seeds were soaked and dried for 1-2 days before sterilization. The ginger browns with softened brown flesh were removed. Disinfection can be done by soaking seeds with 20% solution of Longcote 500 times for 15-30 minutes, or soaking for 30 minutes with 300 times of Jiangrongning, and then removing the wounds formed by timely cutting and cutting of ginger blocks with grass ash, flattening and using grass. Cloths or sacks cover the boring for 6-12 hours before germination.
3. Selection and site preparation. Select sandy loam seed ginger with high topography and drainage. Before planting ginger fields, open the surrounding area and drains between the rows. The ginger ditch should not be too long to prevent the accumulation of water in the fields.
4. Soil disinfection. Use 20% Longoke 500 times liquid or 300 times ginger ginger to spray on ginger seeds and surrounding soil until wet.
5. Scientific management of fertilizer. Fertilizers used in Jiangtian should be guaranteed to be free from pathogens of ginger cultivars. Organic fertilizers must be fully cooked before they can be used. During the growth of ginger seedlings, it is possible to apply ash to the trees several times and spread 50 kg per mu. Jiang Tian is best to use well water irrigation.
6. Deal with diseased plants in time. The central diseased plants found in the field should be uprooted in time, cleaned out of the field together with the soil in the diseased hole, and soil should be disinfected with lime, and the diseased plants must not be thrown into drains and wells.
7. Chemical control. In the early stage of the disease, 20% Longketsu 500 times or 300 times Jiangyanning can be used to spray the affected center and surrounding plants. Each dose of 250 ml per plant, seedlings when the amount of 500 ml per plant, spray irrigation every 5-7 days, continuous irrigation 3-4 times.
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