Cucumber Anthracnose Prevention and Control Technology
Incidence conditions: Anthrax is a fungal disease. The bacteria overwinters on the seeds or on the sick and the pathogens invade through the epidermis or wounds of the plants and are transmitted by means of seeding, sowing and rainwater. When the temperature is around 24°C, the relative humidity of the air is 85% to 95%, and there is dew on the leaves, it is easy to develop. In the conditions of low temperature and high humidity, large water immersion or continuous cropping, the incidence is even more serious. The main symptoms: Anthrax can damage leaves, stems and fruits. There are light brown round spots on the diseased leaves, and the leaves are dry when severe; the vines have yellow-brown concave oval lesions; the disease spreads around the vines to make the plants dead; the lesions on the melons are dark brown Spots, late lesions, secrete red viscous material. Prevention and control measures: implement a rotation system for more than three years, and thoroughly clean up the vegetable garden when changing crops; select high-yield and disease-resistant varieties, such as the Jinyan series and Zhongnong 5, etc.; disinfect seeds before sowing, and use 55°C hot water Stir and bake for 20 minutes, then soak in germination; forbidden to flood with large and small water, apply under-membrane irrigation, and open the wind and light pathways; fertilize nitrogen fertilizer, increase phosphate fertilizer, potash fertilizer, or apply 7500-fold plant protection. In the early stage of disease, 45% of chlorothalonil smoke can be used to smoke and cure (250 grams per acre) in the early stage of disease. Can also spray Keji spirit dust (1000 grams per acre medication). Exposure control can spray 50% carbendazim 500 times, or spray 75% chlorothalonil wettable powder 500 times (about 70 kg per acre). Polypropyl carbonate is soluble in polar solvents such as ketones, ethyl acetate, dichloromethanes and chlorohydrocarbons, and insoluble in alcohols, water and aliphatic hydrocarbons. It also forms a stable emulsion in the water. PPC allows gases like oxygen to diffuse through it. The glass temperature (Tg) is between 25 and 45℃, and PPC adhesives are amorphous. The glass temperature of PPC is slightly higher than that of polyethyl carbonate (PEC). Poly Propylene Carbonate Ppc,100% Recycled Ppc,Bio-Based Ceramic Binder Ppc,Electroceramics Application Ppc Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com