Weed control effects and crop safety of different herbicides in direct seeding paddy fields
In order to screen the suitable herbicide used in direct-planting rice field at Dangtu County,Ma'anshan City,Anhui Province,ten kinds of herbicides were chosen to investigate their control effects on weeds and safety on crop during rice growing season in 2014.The results showed that application of 11％ metamifop · penoxsulam dispersed OF at 5-leaf stage of rice,21％ bensulfuron-methyl · penoxsulam · cyhalofop-butyl OF or 6％ penoxsulam · cyhalofop-butyl OF at 3-leaf stage of rice,respectively,controlled weeds effectively.And the control efficacies based on the plant numbers and fresh weight for whole weeds were both above 90％.All the three herbicides increased the rice yields by 22.4％ 、22.1％ and 21.7％,respectively,compared to the control and showed no damage to rice.
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