Biotecnología en el Sector Agropecuario y Agroindustrial (Dec 2011)
EFECTO DE AGROQUÍMICOS PELETIZADOS EN SEMILLAS DE ALGODÓN SOBRE EL BIOFERTILIZANTE MONIBAC® CON BASE EN Azotobacter chroococcum EFEITO DE AGROQUÍMICOS PELETIZADOS EM SEMENTES DE ALGODÃO SOBRE 0 BIOLFERTILIZANTE MONIBAC® CONTENDO Azotobacter chroococcum EFFECT OF AGROCHEMICALS IN COTTON SEED PELLETS ON MONIBAC® BIOFERTILISER BASED ON Azotobacter chroococcum
Abstract
En la presente investigación, se analizó la influencia in vitro de los plaguicidas peletizados simultáneamente con el fungicida (principios activos: carboxin: 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3 carboxamide y tiram: tetramethylthioperoxydicarbonic diamide) y un insecticida (principio activo: malatión: S-1,2-Bis(ethoxycarbonyl)ethyl-0,0 imethylthiophosphate) en las semillas de algodón sobre la viabilidad del biofertilizante Monibac®-Corpoica con base en Azotobacter chroococcum AC1, cuando fueron aplicados conjuntamente en bandejas experimentales. Se analizó la práctica de recubrir las semillas con los agroquímicos como posible causa de descenso poblacional de la bacteria bajo este modelo de aplicación. Los resultados obtenidos por el Test de Duncan (pNo presente trabalho foi analisado a influencia in vitro dos plaguicidas peletizados simultáneamente com os fungicidas carboxin (5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-Z carboxamide) e tiram (tetramethylthioperoxydicarbonic diamide) alem do inseticida malation (S-1,2 Bis(ethoxycarbonyl)ethyl-0,0 imethylthiophosphate) nas sementes de algodÃo sobre a viabilidade do biofertilizante Monibac - Corpoica contendo Azotobacter chroococcum, estirpe AC1, quando foram aplicados conjuntamente em bandejas experimentais. Foi analisado a pratica de recobrimento das sementes com os agroquímicos como possível causa da diminuição populacional das bacterias submetidas a este modelo de aplicação. Os resultados obtidos pelo teste Duncan (pIn this study, we analyzed the influence of pesticides in vitro pellet simultaneously with the fungicide (active ingredient: carboxin: 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-Z carboxamide and tiram: tetramethylthioperoxydicarbonic diamide) and an insecticide (active ingredient: Malathion: S-1,2-Bis (ethoxycarbonyl) ethyl-0, O-dimethylthiophosphate) in cotton seeds on the viability of biofertiliser Monibac® -based Corpoica Azotobacter chroococcum ACT, when applied together in experimental trays. We analyzed the practice of coating the seeds with chemicals as possible causes of population decline of the bacteria in this model of implementation. The results obtained by Duncan's test (p<0.05) demonstrated that the use of agrochemicals affect the viability of A. chroococcum ACT, causing a decrease in concentration but without involving the disappearance of the organism in the cotton seed. Likewise, the contact time with the microorganism pesticides influenced (p<0.05) on the viability of this reflected a decrease in concentration with increasing length of exposure. This study contributes to knowledge on the efficient use of biofertilisers to the compatibility that exists with the chemicals applied to cotton farming inputs allowing use these chemicals without affecting the proliferation and activity of microorganisms.
