The control efficient of the weeds is one of the essential factors to obtain high rice yields, primarily in areas moistened fields, that generally represent higher number of species, probably due to heterogeneous of physical characteristics and chemicals of the soil and moisture contents in the different areas. For the development of these control systems of the unwanted species, it is necessary to anticipate the stage of emergence of weed plants in relation of emergence of the crop. These models […]

Resistant populations of Bidens pilosa and Bidens subalternans to the ALS inhibitors herbicides become more frequent at the soybeans fields from middle-west, that is due the intensive use of ALS herbicides, aimed to obtain data that can contribute on the choose of the best alternative of control for those populations. A trial in a green-house, in Piracicaba, SP, to test many herbicides as an possible alternatives of management of those resistant weeds. Initially we used two populations of Bidens pilosa and […]