Miscibility of Nicosulfuron and Three Adjuvants and Control Effect on Setaria glauca(L.)Beauv.in Maize Field
In order to study the synergistic effect of pesticide adjuvants on herbicides,indoor experiments were conducted to investigate the effects of adding 40 g·L-1 nicotinuron with isooctanol polyoxyethylene polyoxypropylene ether(HPP),methylated vegetable oil,and Dizeng as auxiliary agent on its surface tension,expanded diameter,and contact angle.The safety of maize and control effect of 40 g·L-1 nicosulfuron mixed with three kinds of auxiliary agent on the preventing effect for each plant and fresh weight of Setaria glauca(L.)Beauv.was investigated in the field.The results showed that the mixing was safe for maize,after added 40 g·L-1 nicotinuron as three auxiliary agent,the surface tension of the drug solution decreased,the expanded diameter increased,and the contact angle decreased.After 30 days of application,the each plant control efficacy of 40 g·L-1 nicotinuron 1.50 L·ha-1+Dizeng 0.375 L·ha-1 and 40 g·L-1 nicotinuron 1.50 L·ha-1+methylated vegetable oil 0.525 L·ha-1 were both above 80％,and the fresh weight control efficacy was above 90％.The results showed that the conventional dosage of 40 g·L-1 nicosulfuron and high amount of increasing and methylated vegetable oil could improve the plant control effect and fresh weight control effect on Setaria glauca(L.)Beauv.in maize field.
maizenicosulfuronauxiliary agentSetaria glauca(L.)Beauv.prevention and control effect
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