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在杂交水稻制种过程中母本如金23A、Y58S等在分蘖期易感纹枯病,花期如遇阴雨高湿天气,异交结实的种子易感稻粒黑粉病。通过对比试验表明:在分蘖终止期每公顷用爱苗225~375 m L对水675 kg喷施,防治纹枯病效果理想,药效亦长,且叶片在后期仍保持清秀,延长了光合作用时间,提高了光合作用的效率;在齐穗期喷施375 m L/hm2爱苗能有效防治稻粒黑粉病,且谷粒色泽鲜亮,有利于提高制种的产量和质量。
In hybrid rice seed production process, female parent such as gold 23A, Y58S and so susceptible in the tillering sheath blight, flowering in case of rainy and humid weather, outcrossing seed susceptible rice powdery mildew. The results of comparative experiments showed that sprayed with 675 kg water per hectare of 225-375 m L per hectare at the end of tillering stage, the control of sheath blight was effective and long-lasting, and the leaves remained delicate in the later period, prolonging the photosynthesis Time, improve photosynthesis efficiency; Spraying 375 m L / hm2 seedlings at heading stage can effectively control the rice powdery mildew, and the bright color of the grain, is conducive to improving the yield and quality of seed production.