Prevention and control of strawberry anthracnose needs protection and treatment
Strawberry anthracnose mostly occurs in strawberry seedling stage and initial stage of colonization, and the result period rarely occurs. In recent years, the disease has always been heavier in the strawberry breeding grounds in Jiangsu and neighboring provinces, especially in the field where red cheeks and other susceptible varieties are planted. If the pesticides are not used in a timely manner during the Meiyu period, there will often be devastating dead seedlings due to the disease. Chemical control is one of the important measures for prevention and control of strawberry anthrax on the current production. The type of the drug should be selected according to the disease incidence. The predominant use of protective drugs should be used before the onset of disease. The therapeutic drug should be used after the onset of disease. If necessary, it can be mixed and used. From the perspective of active ingredients, prophylactic agents often use protective fungicides such as dexsenibine, azoxystrobin, mancozeb, propinol, chlorothalonil, thiophanate-methyl, and thiophanate-methyl. For triazole bactericides such as pyraclostrobin and difenoconazole, care should be taken to rotate or mix drugs with different mechanisms of action. From the point of view of production applications, BASF Europe's fungicides have occupied a large market share in strawberries. According to Yu Weidong, manager of the company's cash crop market, to prevent and control strawberry anthracnose, BASF's main products are Baitai 60% oxazoline-diethylsulfate water dispersible granules, Kairun 25% pyraclostrobin EC and Jianda 42.4. % oxazole ether fluoroamide suspension agent. Among them, "Baitai" is a compounding agent of pyraclostrobin and dexsenone which has preventive and health-care effects and is suitable for protective drug use. It should be used before the occurrence of anthrax, and it is usually sprayed with 750 times liquid. For more than 14 days, usually once every 10 days, continuous control 3 to 5 times; "Kai Run" in addition to the role of prevention and health, but also has a therapeutic effect, an anthrax occurs in the strawberry field, the drug can be used 2000 times Spraying or irrigating roots, determining the number of medications depending on the condition of the field; "Jinda" is a mixture of pyraclostrobin and fluconazol, which has a low risk of resistance, and also has the functions of prevention, treatment and health care. And in addition to the effective prevention and control of anthrax, the control of gray mold and powdery mildew in strawberry have outstanding efficacy. These three kinds of medicines showed good safety to strawberries. In recent years, they have been applied in many areas such as southern Jiangsu, and the control effect is good. In addition, Bayer AG's Lunasen 43% fluconazole-ferricate suspension, aniline 75% tebuconazole water dispersible granules and Swiss Syngenta Crop Protection Co. The azoxystrobin suspension agents and other drugs have shown good results in the prevention and control of strawberry anthracnose in recent years. Relevant experts reminded that strawberry anthrax is important for prevention, especially for susceptible varieties to be used before the onset of the rainy season. After the rain, especially after large winds and rains, medication should be used for prevention and treatment; for varieties with certain disease resistance, strawberries should be checked frequently. With regard to susceptible parts such as stolons and stipules, it was found that initial lesions were immediately treated with medications, especially after strong typhoon storms. According to the amount of seedlings, the root and neck should be sprayed with liquid medicine to ensure the control effect. In addition to the seedling stage, anthrax occurs during the strawberry planting period, and it is necessary to produce the medicine with Xia Tian in the production (such as "Kairun" 2000 times spraying or rooting before transplanting), and the protective agent is used for prevention at the initial stage of planting. A greenhouse(also called hothouse)is a building or complex in which allow for greater control over the growing environment of plants. Depending upon the technical specification of a greenhouse, key factors which may be controlled include temperature, levels of light and shade, irrigation, fertilizer application, and atmospheric humidity. Greenhouse may be used to overcome shortcomings in the growing qualities of a piece of land, such as a short growing season or poor light levels, greenhouses are often used for growing flowers, vegetables, fruits, transplants and seedlings. Greenhouses can be divided into glass greenhouses and plastic greenhouses. 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