Efficacy and Phytotoxicity Test of Different Dosages of 4% Nicosulfuron Suspending Agent on Weeds in Corn Field

Using Zhengdan 958 as the test material,different dosages(1 050,1 500 and 1 950 mL/hm2) of corn postemergence herbicide 4% nicosulfuron suspending agent was sprayed in the corn 5 leaves stage by spraying water and artificial weed as controls,the effects of different dosages on weed control efficacy and safety and yield of corn were analyzed in order to determine the optimal dosage.The results showed that in the corn 5 leaves stage spraying 4% nicosulfuron suspension agent to control weeds,the suitable dosage was 1 500 mL/hm2,not only the weed control effect was better,but did not produced damage to corn,and the yield of corn was higher.