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前言几十年来各国对黄瓜枯萎病的防治并无有效可行的方法。有些国家曾采用土壤熏蒸或嫁接的办法以达防病目的,但这些办法的经济性和可行性是值得商榷的。近几年来,我市采用抗病品种和提高栽培技术相结合,加之以内吸杀菌剂的土壤处理,对减少此病的危害有一定作用。但化学农药的土壤处理,一方面可以杀灭土传病原菌,同时也可杀灭土壤中的有益微生物,改变农作物的微生物环境,影响农业生态系的平衡,从而有可能促使病害的高速回升和发展,一些非重要的病虫害也可能上升为重要病害。因此,发展土传病害的生物防治,已引起世界
Preface The prevention and treatment of cucumber blight in various countries for decades has not been proved to be an effective and feasible method. Some countries have used soil fumigation or grafting methods to prevent diseases, but the economics and feasibility of these measures are debatable. In recent years, the city uses the combination of resistant varieties and cultivation techniques, combined with soil treatment within the fungicide to reduce the harm of the disease have a certain effect. However, the chemical treatment of soil pesticides, on the one hand can kill soil-borne pathogens, but also kill beneficial microorganisms in the soil, changing the microbial environment of crops, affecting the balance of agricultural ecosystems, which may prompt the rapid rebound and development of diseases , Some non-important pests and diseases may also rise as an important disease. Therefore, the development of biological control of soil-borne diseases has caused the world