Revista Brasileira De Herbicidas 2006; 5(1): 1-9

ISSUE Cover

NO-TILLAGE EFFECT IN YELLOW NUTSEDGE (Cyperus rotundus L.) AND OTHER WEED SPECIES CONTROL AT MAIZE CROP

DOI: 10.7824/rbh.v5i1.39

It was aimed at in this work to evaluate the population dynamics of yellow nutsedge (Cyperus rotundus L.) and of other species of weeds at maize (Zea mays L.) crop also cultivated for grain and for silage, under no-tillage and conventional tillage of the soil conditions. In the first year, the maize was cultivated in total area, being half of the area in no-tillage and the other half in conventional tillage. Later each area was splitted in two plots: one to produce maize for grain and other to produce maize for silage. They were appraised: a) weed plants before the desiccation and/or the soil tillage and after the crop of the maize and bean; b) weed control after the application of the herbicides in post-emergency at the maize. It was ended that: the type of management of the soil influence C. rotundus L. control that was observed independently in the areas where it was made the no-tillage, whether maize for grain or silage. There was no increase of C. rotundus L. infestation at conventional tillage. Infestation of the other weeds species was not influenced by the type of the soil management or maize cultivation system, except the lyon velvet bean (Stizolobium niveum Kuntze), that had infestation at maize for silage.