Glyphosate application associated to non-purified residue of biodiesel production: analysis of different prototypes

Abstract

Glyphosate is an agricultural pesticide of great importance in the world. In this sense, several studies have been developed in order to select adjuvants which elevate the efficacy of the product. Two experiments were performed with the goal to evaluate the efficacy of the glyphosate herbicide when associated to different experimental prototypes of agricultural adjuvants, elaborated from non-purified residue ofbiodiesel production. Gross residue from the biodiesel production was used, as well as its dilution in water, and addition of ammonium sulfate, KOH and/or soybean oil. Control of morning glory (Ipomoea triloba L.) was evaluated in experimental plant nursery, as well as the infestation of weeds in the field condition. In general, the presence of adjuvant prototypes in glyphosate herbicide spray did not result in an increase of the control in any experimental condition, as well as, it did not reduce the efficiency of the product.