With the adjustment of the agricultural industrial structure, the area of ​​cucumber cultivation in protected areas has been expanding in recent years, but the output has not been significantly improved, and there is a trend of decreasing year by year. The main reason is the disease, and one of the causes of the disease is heavy Planting. The main diseases are: dry disease, downy mildew, black spot disease, bacterial angular spot disease, blight, gray mold, powdery mildew, viral disease, disease and so on. Control methods: 1. Improve and improve cultivation techniques: Cultivate strong seedlings, cultivate at the right time, apply sufficient base fertilizer, properly apply phosphorus and potassium fertilizers, and rationally arrange watering. It is best to spray water droplets. The time for watering should be selected on sunny days. In the morning. It is best to rotate in a timely manner and use high ridge cultivation to improve the plant's pullability. Second, planting disease-resistant varieties and adopting grafting techniques, pumpkins can be used as rootstocks for cucumbers. Third, the chemical control 1, disinfection of the seedbed or seeds, seeding period can be used to disinfect the seedbed or seed dressing with 95% powder. The seedbed disinfection is carried out with 95% of carbendazim and 1 g of fine sand per square meter. After sowing, it is evenly sprinkled into the seedbed for cover soil, or sprayed with the 95% carbendazim 3000 times solution. Seed disinfection: soak seeds with 95% carbendazim powder 3000 times, and sow 2 hours later. After 2 to 3 days of transplanting, spray Greenheng No. 2, and after rooting the live tree, root infusion was performed with 3000 times 95% carbendazim. This is the main means of preventing and curing cucumber soil diseases, and it is very simple. Spraying in the seedling stage can add some foliar fertilizer, which can increase production and prevent disease. 2. In the early stage of the onset or onset of cucumber downy mildew and disease, you can use Anke 500 times solution, 500 grams of cream, 500 times of cytotoxic solution, and 500 times of Dasheng, spray every 7 to 10 days. Once applied, at the peak of the onset, you can use 600 times of the gram-killing solution, 500 times of the gram cream to spray, and apply once every 5 to 7 days. In the rainy day, you can choose 200g/mu of bacteriostatic agent, fumigation. The shed can be fumigated once every 3 to 5 days. You can also use the powder of gram and chlorothalonil powder 1 kg/mu to spray powder every 5 to 7 days to reduce the humidity of the shed to achieve disease prevention. The effect of the disease. 3, in the onset of cucumber scab, you can use Xiansheng 500 times solution, DuPont Fuxing 500 times, myclobutanil rotation for spraying, every 7 to 10 days. In the rainy weather, you can use the black star smoke agent 250g/mu fumigation chamber, fumigation every 3 to 5 days. 4, in the pathogenesis of cucumber gray mold, the use of 500 million times of pyrimethanil 500 ~ 700 times, speed Keling 500 times, spray for rotation, every 7 to 10 days of application. In the peak period of the disease, the dosage can be appropriately increased, and the application can be applied every 3 to 5 days. In the rainy day, the Kekeling smoke agent 250 g/mu fumigation chamber can be used, and fumigation is performed every 3 to 5 days. It can also be used to spray powder of 2 kg per acre of Wanxu Ling powder to reduce humidity and achieve better control effect. 5, in the early stage of the onset of cucumber keratosis can kill 800 times liquid, agricultural streptomycin 10 million units of rotation for spraying, every 7 to 10 days of application, at the peak of the incidence of optional hydrotalin 500 times solution It can kill 500 times of liquid for spraying and apply once every 3 to 5 days. 6. In the early stage of the onset of cucumber virus disease, use 500 to 800 times of virus treatment vaccine (not mixed with Other pesticides), 500 times liquid poisoning, and rotate for spraying every 7 to 10 days. In addition, based on years of experience in the early stage of downy mildew, 100 grams of brown sugar plus 100 grams of urea water, spray with a sprayer to evenly inhibit the disease. (Wei Xiangfeng Zhao Bofu) Author: Agricultural Technology Promotion Center of Zhaodong City, Heilongjiang Province
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