葡萄霜霉病药剂防治试验刘微，孙淑梅，韩志强（河北省农林科学院昌黎果树研究所）霜霉病是葡萄的重要病害之一，为害叶片、新梢和果穗，造成落叶、落果，直接影响产量，严重时近乎绝收。由于病原菌对内吸性杀菌剂极易产生抗药性，对有些杀菌剂，尤其连续使用多年的地区，... Prevention and Control of Grape Downy Mildew Agents Liu Wei, Sun Shumei, Han Zhiqiang Downy mildew is one of the important diseases of grapes. It damages leaves, shoots and ears, causing deciduous and deciduous fruit, which directly affects the yield , Almost when it is absolutely serious. As the pathogen bacteria easily produce antibacterial agents, for some fungicides, especially for many years continuous use of the region, ...