【摘要】 用云大1202000倍液浸种,可使水稻幼芽的成活率达100%,幼苗的成活率平均提高85.12%。芽期喷施浓度与品种的来源有关,日本品种用4000倍液、云南品种则用2000倍液的防治效果较好。用云大120的2000倍液浸种和苗期喷施相结合,对防治稻幼苗冷害的效果更佳。更多还原

【Abstract】 Presoaking rice seeds prior to sowing with BR120 at the conc. of 1∶2 000 gave a 100% survival rate of buds and 85.12% of seedlings. The effects of cold injury control of BR120 sprayed at the budding stage of the plant varied with the origin of the rice varieties used. The optimum concentration of the chemical was 1∶4 000 for varieties of Japanese origin and 1∶2 000 for varieties of Yunnan origin. Combination of presoaking of the seeds with spraying the plants at 1∶2 000 at the seedling stage gave the best results.更多还原