番茄早疫病的药剂防治试验番茄早疫病是露地和保护地番茄的重要病害，近年有日趋加重的趋势。番茄患病后，病原菌产生交链孢酸毒害病部细胞，导致有效光合面积下降，造成落叶落果。发病严重的地块病叶率达９０％左右，病情指数４５％左右，严重地影响番茄的产量和质量。田... Control of Early Blight of Tomatoes Early blight of Tomatoes is an important disease of tomato in open field and protected area and has been aggravating in recent years. Tomato disease, the pathogens produce Alternaria acid poisoning disease cells, resulting in decreased effective photosynthetic area, resulting in deciduous fall. Severe disease block disease rate of about 90%, disease index of about 45%, seriously affecting the yield and quality of tomatoes. field...