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Cucumber wilt disease prevention and control method
Cucumber fusarium wilt can occur on open soil and cucumbers in protected areas. Generally, greenhouse cucumbers, greenhouse cucumbers, and exposed spring cucumbers occur more severely, and summer and autumn cucumbers occur less frequently. Agricultural control: (1) Selection of disease-resistant varieties, such as Changchun Mimi, No. 2, 3, No. 4 and Zhongnong No. 5, etc. (2) Seed disinfection, seed dressing or soaking in warm water at 55°C for 15 minutes. (3) Using germination live. Seed germination after seed germination in the seedlings, do not transplant seedlings 2 times, does not hurt the roots. (4) Rotation. Non-guaranteed crops should be rotated for more than five years, and the seedbeds should be replaced or new soil replaced after 2-3 years. (5) Improve cultivation management. Watering should be controlled before squashing to promote root growth. Watering of the saplings during the sapling stage should be appropriate, and more fertilizer should be applied. Watering must be controlled later. When watering, it is necessary to pay attention to pouring small water, prevent flooding, and drain water in time after rain. Fertilization requires a reasonable combination of nitrogen, phosphorus and potassium. Each application of diammonium is 20 kg and potassium sulfate is 20 kg. Organic fertilizer must be fully cooked. (6) Grafting and disease prevention. The grafting of black seed pumpkin as the rootstock is an effective method to control the fusarium wilt in the old shed cucumber for many years. Chemical control: (1) soil disinfection. Found that there is a slight incidence of sorghum cucumber, before the colonization with thiophanate-methyl or carbendazim and other agents, with 1:100 ratio of drug soil, according to the amount of 1-2 kg per acre, scattered in the planting ditch, There is a preventive effect. (2) After the onset of the disease, the pesticides such as thiophanate-methyl, carbendazim and aplon were used to irrigate the roots 400-fold, and 8-10 days were used for irrigation to control the spread. The diseased plants should be removed in a timely manner, and the above drugs should be used to disinfect the holes to control the spread of the soil.