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水稻品种是南粳9108,前期田间有少量植株发生叶瘟,在水稻破口5%~8%时每亩用云丰组合2套防治穗颈瘟,每套药含60%嘧菌酯5克和70%戊唑醇4克,施药24小时后下了一点小雨。这样用药没能控制住病情,现在地里稻瘟病病穗率达20%,该怎么防控?有关专家对此进行了解答:防治穗颈瘟应在破口始穗期用药,如果抽穗期阴雨天多或品种易感病,宜间隔5~7天再用药一次。前期田间叶
Rice varieties are South Japonica 9108, a small amount of early plant leaf plague occurred in the field, 5% ~ 8% of rice break when the combination of Yunfeng 2 sets of prevention and control of panicle blast, each containing 60% azoxystrobin 5 grams And 70% tebuconazole 4 grams, after applying a little light rain after 24 hours. This medication can not control the disease, and now the blast disease in the ground spike rate of 20%, how to prevent and control? Experts have answered this question: Prevention of panicle blast should be used in the beginning of the breach, if the rainy days of heading Days or varieties susceptible to disease, should be interval 5 to 7 days and then medication. Pre-field leaves