Foliar Spray Response with Pseudomona sp. to the Application of Glyfosate in Corn Plants

CARDOZO M.G., FORTUNA J., MASCIARELLI O., TRAVAGLIA C., REINOSO H

BIOCELL

INST HISTOL EMBRIOL-CONICET

Lugar: Mendoza; Año: 2013 p. 42 - 42

0327-9545

At present, the use of pesticides is widely spread in the world. However, the continuous use of these components for extensive periods can lead to alterations in hard reversible soils. Glyfosate constitutes one of the most commonly used wide spectrum pesticides. The microorganisms? activity in soils is the main determinant of pesticides degradation. The aim of this paper was to evaluate the response of corn plants RR (resistant to Roundup®) to the foliar spray with Pseudomona bacteria and the use of this pesticide as a biofertilizer and detoxificant method of the Glyfosate residues. Five repetitions were done (n=6), in 300 cc pots with soil/perlite, in growth chamber (16h light, 28°C/ 8h darkness, 20°C), for 30 days. The foliar spray with Glyfosate (2.5L/100L) and Pseudomona sp. (107 UFC/ml) was carried out in the V2 and V3 stages respectively. The herbicide application decreased the foliar area, root dry weight and area part, pigments content and phytohormones, rate and stomachic frequency, compared to the control. On the other hand, the foliar spray with Pseudomona sp. in the presence of Glyfosate significantly decreased these herbicides effects, decreased more than 50% of the residual content of Glyfosate in leaves and increased the content of phytohormones. This capacity results advantageously interesting for the agro industry because besides reinforcing the role of PGPR for its characteristics already known, it would contribute to optimum results in the toxic residues degradation as a sustainable practice.