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7～8月份是葡萄在一年中的发病高峰期。在此期间病虫害防治的好坏,不仅对当年植株的生长影响重大,对来年果园的病虫害防治也不无影响。葡萄病害的防治要做到以防为主,综合防治。此期间红提葡萄的主要病害有:霜霉病、白粉病、褐斑病、黑腐病、黑痘病。一、发病症状及防治措施1.葡萄霜霉病多雨年份7月下旬至8月份霜霉病即行初侵染,因此,要随时检查叶片、新梢。该病主要危害叶片和嫩
July to August is the peak incidence of grapes in the year. During this period, the quality of pest and disease control has a great impact not only on the growth of the plant in that year, but also on the prevention and control of pests and diseases in the orchard in the coming year. Prevention of grape diseases should be done to prevent, comprehensive prevention and treatment. During this period red grapes main diseases are: downy mildew, powdery mildew, brown spot, black rot, acne disease. First, the incidence of symptoms and prevention measures 1. Grape downy mildew Rainy season in late July to August downy mildew that line early infection, therefore, to always check the leaves, shoots. The disease harms the leaves and tender