直播稻田稗草[Echinochloa crusgalli(L.)Beauv]化学防除的研究

Study on Chemical Control of Barnyard Grass[Echinochloa crusgralli (L.) Beauv] in Directly Sowing Paddy Field

本文就在水稻直播田里采用杀草丹于稗草不同叶龄施药防除稗草的效果,不同用药量的效果,以及水层对药效的影响进行了研究。结果表明,一叶龄施药的效果最好,每亩田用50％杀草丹乳剂250g即可,水层以施药时1cm,3天保持湿润,第4天保持3cm为最佳。

Effect of benziocarb applied at different foliar ages of barnyard grass by different doses and with different water depth in controlling barnyard grass in directly sowing paddy field was reported. The results showed that effect of 50％ benziocarb applied by 250g/mu at the first foliar age of barnyard grass was the best and that the water layer should be kept in 1 cm depth when benziocarb was applied, and than kept moist in the first three days, 3 cm depth in fourth day.