BUSCANDO UM BIOHERBICIDA CONTRA Cyperus sp (tiririca)

Abstract

As an alternative to conventional control of Cyperus sp (herbaceous nutsedge), with chemical products, it rises the biological control, making use of phytopathogenic microorganisms. As results of the whole production of Cercospora henningsii e Cercospora caricis by fermentation in potato-dextrose (PD) liquid medium, it was observed that both species obtained the optimum growth at 36o C. C. henningsii attained the best value after a period of 72 h of fermentation and C. caricis attained it after 60 h. The field experiments, against Cyperus sp (nutsedge), with the obtained products by liquid fermentation of Cercospora sp (C. henningsii and/or C. caribaea), and with the use of "wet chamber", proved the pathogenic potential bioherbicide of these microorganisms.