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Soft rot. Mainly harmful to cabbage, radish, cabbage, red cabbage, broccoli and so on. The pathogens overwinter with the diseased plants in agricultural fertilizers, soils and insects, and spread with rainwater, agricultural fertilizers and insects. More epidemics occur from October to November. For this disease, it is necessary to carry out rotations, such as the implementation of water and drought rotation, or the implementation of dry soil for 2-3 years and grass crop rotation. The deep ditch is narrow and the three (畦, waist, and circumference) ditch are matched to ensure smooth flow of water, reduce the humidity in the field, and reduce the disease conditions. The base fertilizer is mostly used in decomposing farmyard manure, and there is no need to have a sick and sturdy plant, and the fertilization should be fully fermented if necessary. Sowing at the right time to avoid the peak incidence. Timely seedlings are used to facilitate seedlings and enhance disease resistance. The key point is to grasp the prevention and control of the fixed-to-package period, using 72% agricultural streptomycin 2000 times solution, neo-phytomycin 3000 times solution, 72% dixon 600 times solution, and 14% lycopene copper solution 700 times. The liquid is used alternately, and the crude water is sprayed and drenched, once every 10 days to 15 days, and used twice or three times.
Viral disease. Cabbage, radish, red cabbage, rape, cabbage, broccoli, mustard, mustard, etc. occur. The virus overwinters on residual diseased leaves and weeds. Prevention and treatment of viral diseases, mainly to control aphids and other mediators. Control aphids, spray from once every 5 days to 7 days after emergence, and use 10% sputum (one time net, big hero, imidacloprid, Kangfuduo, etc.) 2500 times to 3000 times liquid, orèšœ 1500 times liquid, or anti-èšœå¨ 1000 times liquid, spray 50 kg per acre. In the early stage of the disease, use 5% toxic water-clearing agent 300 times to 400 times, 20% virgin ning (a) WP 500 times solution, 83 reinforced agent 100 times solution, alternate use, focusing on seedling application, 10 days to 15 days 1 time, used 2 times to 3 times.
Sclerotinia sickness. Mainly harmful to cabbage, radish, cabbage, rape, mustard, lettuce and so on. The disease is sclerotia in the soil or mixed in the seeds for summer and winter, and can survive for more than one year in the dry soil, and only survive for about one month when flooded. To prevent and cure this disease, it is necessary to deepen the narrow ditch and support the three (畦, waist, and circumference) ditch to make the flow smooth, reduce the humidity in the field, and reduce the disease conditions. The base fertilizer is mostly used in decomposing farmyard manure, and there is no need to have a sick and sturdy plant, and the fertilization should be fully fermented if necessary. Sowing at the right time to avoid the peak incidence. Timely seedlings are used to facilitate seedlings and enhance disease resistance. In the early stage of sclerotinia disease, 50% carbendazim 500 times solution, green milk copper 600 times solution, 70% methyl thiophanate WP 1000 times solution can be used alternately, 10 days to 15 days, depending on the condition. Shi.
Root swelling. It occurs on cabbage and mustard, and it also harms red cabbage, mustard, and radish. In the early stage of the disease, the host grew slowly, and the base became yellow at the end, the whole plant died, and large and small tumors appeared in the roots. Prevention and treatment of clubroot disease, 7 days to 10 days before transplanting, 667m2 with 150 kg of quicklime applied to the noodles; transplanted 15% lime water per hole or 75% pentachloronitrobenzene 800 times solution after transplanting 0.25-0.5 kg irrigation. Strengthen the field inspection. If the disease center is found, use the above liquid medicine alternately for 2 to 3 times. Remove the diseased plants in time and do not throw them. (Xie Xuefang) Source: Sichuan Science and Technology News
Downy mildew. Mainly harmful to cabbage, radish, broccoli, mustard, mustard and rape. The bacteria overwinter on the soil residual plants, and the seeds are also contaminated. It is easy to be endangered by rainy and humid weather. Pathogens are often spread by wind, rain, and running water. It has been observed that when the temperature is between 18 °C and 22 °C, the monthly rainfall is between 150 ml and 220 ml, which is conducive to the invasion of the disease. It is suitable for the development of the disease during the winter and Spring. In the last year, the weight of the hills can be disinfected with lime sulfur or 70% dikesone. Strengthen field management, and control the water during the period of seedlings, fixed trees, and rosettes. In the period of the core, water and water are indispensable to prevent flood irrigation and to achieve good drainage. Strengthen field inspections, find the central diseased plants, and choose sunny days or spray control before rain. Seeds can be sterilized with 80% dexamethasone, 75% chlorothalonil, and 50% thiram before planting. The dosage is 0.4% of the seed weight, or 10% salt water is used to kill the seed attached. The pathogen on the surface. In the early stage of downy mildew, 40% metalaxyl 600 times solution, 58% metalaxyl manganese zinc 500 times solution, 25% toxic mycelium 800 times solution, 50% dexamethasone 800 times solution, 75% white bacterium 600 times liquid, 72% gram dew wettable powder 600 times ~ 800 times liquid, 64% antivirus 矾 400 times ~ 500 times liquid, 50% nail cream copper wettable powder or 40% ethyl phosphorus aluminum wettable powder 400 times ~ 500 The liquid is used alternately, and the dilution liquid is sprayed 50 kg per acre, 7 days to 10 days, and the spraying is repeated 2 times to 3 times.
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