三麦赤霉病菌孢子何时侵入麦穗?何时喷药防治最好?这个问题已经有很多报道,基本上都肯定扬花期最易感病,扬花期是喷药防治的关键时期。但在某些年份,例如1977年并未取得多大效果。我根据多年来的实践和病菌孢子侵入麦穗所需条件,认为在病菌孢子充足 When the spores of three Gram-positive bacteria invade the wheat? When spraying the best? This issue has been a lot of reports, basically the most susceptible flowering stage, flowering is the key period of spraying prevention and treatment. However, in some years, such as 1977 did not achieve much effect. I based on years of practice and bacteria spore invasion of wheat required conditions that the spores in the bacteria sufficient