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1989～1992年采用控制性试验和田间调查研究稻粒黑粉病发生危害与寄主的关系结果表明:(1)稻粒黑粉病在异花授粉水稻不育系上发生危害严重,而对自花授粉水稻几乎不造成危害.(2)水稻抽穗扬花期是病菌侵染的主要时期,病菌侵染过程和投粉受精过程基本同步进行.(3)不育系开花时间分散、持续时间长和外露柱头率高是导致发病严重的主要寄主因素.恢复系花粉量在一定程度上影响不育系发病.(4)对稻粒黑粉病应采取以药剂防治为主的综防策略.
The results showed that: (1) Rice powdery mildew was seriously endangered in cross-pollination of male sterile lines in rice, while the control of self-pollination Flower pollination almost no harm to the rice. (2) The flowering and flowering of rice is the main period of pathogen infection, pathogen infection and pollination process basically the same. (3) sterile flowering time dispersion and long duration Exposed stigma rate is the main host disease leading to serious disease.The recovery of pollen amount to a certain extent, affect the incidence of male sterile lines. (4) The prevention and treatment of rice powdery mildew should be taken mainly based on comprehensive prevention strategy.