The main diseases of cucumber in greenhouse are: cucumber downy mildew, gray mold, etc.; insects have aphids and whitefly, etc. In the winter greenhouse cucumber management, it is necessary to strengthen cultivation and fertilizer management, increase the application of phosphorus and potassium fertilizer, and improve the disease resistance of plants. Ability, pay attention to ventilation, light transmission and humidity in the greenhouse, and create conditions that are not conducive to the occurrence of pests and diseases. In the early stage of pests and diseases, effective chemical control measures should be taken to control the pests and diseases in order to prolong the harvesting period and achieve the purpose of increasing production and income. 1. Cucumber downy mildew: In the early stage of the disease, use 25% toxic mycelium WP 1500-1000 times solution, 75% chlorothalonil WP 500-600 times solution, 72% ke condensable powder 600-800 Double liquid or 72% Plex water 600-1000 times liquid, spray once every 7 to 10 days, continuous control 3 to 5 times. 2. Cucumber gray mold: In the early stage of the disease, use 50% keering WP 2000 times solution, 50% phlegm WP 1500 times solution or 75% chlorothalonil WP 600 times solution, every 6 to 7 days of medication, continuous prevention and treatment 3 to 4 times. 3. Aphids and whitefly: Take the combination of yellow plate trapping adult insects and chemical control, use 30% smog smoked smoke agent, 420 grams per mu for smoke control, or 25% Aketai water dispersant, 3 grams of water per acre plus 45 kilograms of spray control, once every 7 days, once every 3-4 times, you can receive better control results. PCR Reagent For Bacterial Resistance PCR,PCR Reagent,Molecular diagnosis,Bacterial resistance Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimedicadevice.com