How to prevent and control ginger rot? A detailed explanation of integrated control techniques
1. Select disease-free ginger seed and disinfect seed ginger. Keep seed from disease-free land or select disease-free ginger as seed; before sowing, soak the cut seed ginger in a 800-fold dilution of 50% carbendazim wettable powder for 6 hours, or soak it in a 2000-fold dilution of xinzhiromycin for 24 hours. 2. Ginger field selection and disinfection. The pathogen can survive in soil for more than 2 years, so...
1. Select disease-free ginger seed and disinfect seed ginger. Keep seed from disease-free land or select disease-free ginger as seed; before sowing, soak the cut seed ginger in a 800-fold dilution of 50% carbendazim wettable powder for 6 hours, or soak it in a 2000-fold dilution of xinzhiromycin for 24 hours.
2. Ginger field selection and disinfection. The pathogen can survive in soil for more than 2 years, so strict crop rotation should be practiced and the cropping sequence rationally arranged; it is best to choose a plot where ginger has not been grown for 3 years. Before sowing, while plowing and harrowing, evenly broadcast 5-10 kg of quicklime per 667 sq m (1 mu) into the field, and turn and harrow so the lime fully contacts the soil; or use Beinong Luxiang soil fungicide diluted with water and spray it directly on the soil. Both can achieve a sterilizing and disinfecting effect.
3. Standardize cultivation management. First, adopt plastic film mulching cultivation and rational close planting to improve the plants' disease resistance. Second, apply clean fertilizer and increase the application of phosphorus and potassium fertilizers and trace element fertilizers to strengthen the plants' disease resistance. Third, manage water rationally; when watering, use small amounts and water frequently to maintain soil moisture; after heavy rain, drain standing water promptly and flush-irrigate with well water. Fourth, carry out timely hoeing, weeding and hilling, and control insect pests.
4. Chemical control. First, promptly pull out diseased plants and disinfect the diseased holes and surrounding soil with quicklime. Second, strengthen chemical control in the early stage of the disease; spray the middle and lower parts of the plants or drench the roots with a 1300-fold dilution of 20% yekuning or a 1000-fold dilution of 50% amobam, once every 7 days, for 3-4 consecutive times. Third, continue chemical control in the middle stage of the disease; spray or drench the roots with a 5000-fold dilution of agricultural streptomycin or a 600-fold dilution of 50% duofengnong wettable powder, once every 8-10 days, for 2-3 consecutive times.