Use of substituted urea herbicides on carrot (Daucus carota L.) crop: I - control of weeds

Abstract

It was conducted in the Experimental Field of Horticulture Section of ESALQ, Piracicaba, an experiment to verify the effect of linuron, chloroxuron and chlorobromuron for weed control in carrot cv Kuroda. It was tested minimum and maximum rates recommended by herbicide productors in "pré" and post-emergence of weeds. Linuron, in "pre"-and post-emergence, was more efficient and, chlorobromuron also gave good results. The less efficient was chloroxuron at 6 kg/ha (minum rate),. The herbicides did not keep free of weeds until the end of carrot crop, maybe need another application after 40 days seedling.