玉米中后期常发病害及其防治玉溪地区农科所６５３１００杨进成玉米生长中后期易发生玉米大、小斑病和玉米穗腐病为害，这些病害均喜高温高湿气候，病害流行与否，主要取决于品种抗性强弱、越冬菌源多少及气候条件适合与否三个方面，如菌源多、品种抗性弱、恰又遇高温高湿... The late maize disease and its prevention and control of Yuxi Prefecture 653100 Yang Jincheng Maize susceptible to large and small spot and corn ear rot disease in the late growth, these diseases are like high temperature and humidity weather, epidemics or not, the main Depends on the strength of the variety resistance, the number of overwintering bacteria and climatic conditions suitable or not, such as three, such as bacterial sources, variety resistance is weak, just in case of high temperature and humidity ...