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文根据１９７９～１９９５年利用１９５３个稻瘟病菌株，先后对鉴别品种及主栽品种进行抗谱测定，分析品种田间抗性变化，揭示了稻瘟病菌生理小种变化动态，预示品种抗性丧失时限，是稻瘟病发生流行的前兆；探明了品种抗性丧失的主要原因，是来自品种自身病菌新致病小种数量的增殖和毒力强化，由潜在致病种群上升为优势种群，从而导致该品种抗性的丧失，造成稻瘟病的大发生大流行
Based on 1953 blast strains of Magnaporthe grisea from 1979 to 1995, the resistant cultivars of cultivars and cultivars were identified and their resistance changes were analyzed. The changes of physiological races of Magnaporthe grisea were revealed, , Which is the precursor of the epidemic of rice blast. The main reason for the loss of resistance of rice varieties is the proliferation and virulence enhancement of the new pathogenic bacteria from their own bacteria, and the increase from the potential pathogenic population to the dominant population, resulting in The loss of resistance of the variety, causing a large pandemic of rice blast