The influence of selected spraying parameters on two formulation of sulfonylurea herbicides effectReport as inadecuate




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Journal of Central European Agriculture, Vol.14 No.1 March 2013. -

The objective of this study was the evaluation of spray volume and nozzle type effect on different formulation water dispersible granules - WG and oil dispersion - OD of two sulfonylurea herbicides: the mixture iodosulfuron methyl sodium + amidosulfuron and iodosulfuron methyl sodium + mesosulfuron methyl efficacy. There were investigated three levels of spray volume 125 l*ha-1, 250 l*ha-1 and 350 l*ha-1 and two types of nozzle extended range flat nozzle TeeJet XR 11003-VS and drift guard flat nozzle TeeJet DG 11003-VS. Each herbicide was used at recommended dose and reduced by half. Spray volume and nozzle type did not affect activity of the mixture iodosulfuron methyl sodium + amidosulfuron, but differentiated the efficacy of OD formulation of iodosulfuron methyl sodium + mesosulfuron methyl, when it was applied at lowered dose. As spray volume rose, herbicide efficacy decreased. Nozzle type influenced OD formulation of the mixture iodosulfuron methyl sodium + mesosulfuron methyl, independently on dose. Significantly weaker efficacy was obtained when drift guard nozzle was used.

dose; efficacy; formulation; spray volume; sulfonylurea herbicide; type of nozzle



Author: Renata KIELOCH - Krzysztof DOMARADZKI -

Source: http://hrcak.srce.hr/



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