How to prevent Jiang Yan?
2019-05-15 03:03:13
Jiang Yan, also known as ginger rot disease, is a common disease that damages ginger. Occurs in the high temperature and rainy season, especially during frequent thunderstorms, and it is the peak period of its onset. The disease first harmed the stem base and tubers that intersect with the ground surface. The diseased plants showed yellowing of the heart and then spread to the whole plant. In the early stage of disease, the disease showed a yellow-brown water stain. The diseased part gradually expanded into dark brown, and the ginger tissue was softened and rotted. As soon as the tissue is squeezed by hand, it collapses and becomes a viscous white liquid with a foul odor. When severely browned and rotted, only one layer of epidermis is left and the aboveground part (ginger seedling) loses water and turns yellow and turns brown. The pathogen of ginger borer is pathogenic bacteria and a disease caused by Pseudomonas. The primary source of infection in this disease is the overwintering fungus or ginger seed in the soil. The bacteria can survive in the soil for two years. Bacterial short rods, can be between 5 - 40 °C, with 27 - 28 °C as the most suitable temperature. PH values ​​between 6.5--7.5 are most suitable. After the disease occurs, pathogens can spread in the field through wind and rain and underground pests, and invade wounds, water holes, and air holes. When environmental conditions are appropriate, it can spread across the whole field.
The prevention and control methods must be “preventive and control combinedâ€. Choose disease-free ginger, implement paddy-upland crop rotation or rotation with grass crops, do not keep continuous with former Qiang Jiangtian, interval should be more than 3 years, before making avoiding planting tobacco, eggplant and other solanaceae crops and potato and peanut, Chinese cabbage For other crops, 75 kg of lime are applied per acre when growing ginger. Ginger should be a "sun" two "bubble", choose healthy, full of ginger, before sowing 0.1kg per block after the sun exposure to the skin slightly wrinkled, can be used potassium permanganate or other fungicides to soak 5 - 8 minutes, dry and then pile up with plant ash to germinate until the buds grow to about 1.5 cm to grow. After sowing, the entire seedbed is covered with a layer of lime: sulfur suspension agent: water of 1:1:25, and the dried grass is sprayed uniformly to reduce the evaporation of pesticides and moisture to prevent and control weeds. Grow. Open a good row of ditch to prevent rainwater scouring and flooding, to prevent sick fields from flowing into disease-free fields; ginger is hi moist, and in case of a long period of drought, it is necessary to timely infuse horse water; when the humidity is high, avoid weeding loose soil. In order to prevent mechanical damage and infection of pathogens. Chemical control: When there are sporadic diseased plants in the field, the pathogens should be promptly picked up and destroyed, and a layer of black and white ash (mixed with ash and lime 3:2) should be used to disinfect the soil, or use one-thousandth of permanganate. Potassium solution, or 5% copper sulfate, or 5% bleach, or 72% of agricultural streptomycin WP 3000 to 4000 times, or 50% carbendazim 500 times for irrigated disinfection. When the plant height is about 35 cm and 4 seedlings or more are taken out, the spray is applied 1 time, and then sprayed once every 2 to 3 weeks. 72% of agricultural streptomycin sulfate 2000 times can be used, or 50% DT bactericidal suspension can be used. 500 times liquid agent, or 1000 times enemy powder, or 1000 times 50% sterilization Wei liquid. Pesticides should be used interchangeably. Be careful not to mix them.
The prevention and control methods must be “preventive and control combinedâ€. Choose disease-free ginger, implement paddy-upland crop rotation or rotation with grass crops, do not keep continuous with former Qiang Jiangtian, interval should be more than 3 years, before making avoiding planting tobacco, eggplant and other solanaceae crops and potato and peanut, Chinese cabbage For other crops, 75 kg of lime are applied per acre when growing ginger. Ginger should be a "sun" two "bubble", choose healthy, full of ginger, before sowing 0.1kg per block after the sun exposure to the skin slightly wrinkled, can be used potassium permanganate or other fungicides to soak 5 - 8 minutes, dry and then pile up with plant ash to germinate until the buds grow to about 1.5 cm to grow. After sowing, the entire seedbed is covered with a layer of lime: sulfur suspension agent: water of 1:1:25, and the dried grass is sprayed uniformly to reduce the evaporation of pesticides and moisture to prevent and control weeds. Grow. Open a good row of ditch to prevent rainwater scouring and flooding, to prevent sick fields from flowing into disease-free fields; ginger is hi moist, and in case of a long period of drought, it is necessary to timely infuse horse water; when the humidity is high, avoid weeding loose soil. In order to prevent mechanical damage and infection of pathogens. Chemical control: When there are sporadic diseased plants in the field, the pathogens should be promptly picked up and destroyed, and a layer of black and white ash (mixed with ash and lime 3:2) should be used to disinfect the soil, or use one-thousandth of permanganate. Potassium solution, or 5% copper sulfate, or 5% bleach, or 72% of agricultural streptomycin WP 3000 to 4000 times, or 50% carbendazim 500 times for irrigated disinfection. When the plant height is about 35 cm and 4 seedlings or more are taken out, the spray is applied 1 time, and then sprayed once every 2 to 3 weeks. 72% of agricultural streptomycin sulfate 2000 times can be used, or 50% DT bactericidal suspension can be used. 500 times liquid agent, or 1000 times enemy powder, or 1000 times 50% sterilization Wei liquid. Pesticides should be used interchangeably. Be careful not to mix them.
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