Evaluation of agrochemicals and bioinputs for sustainable bean management on the Caribbean coast of Colombia
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Universidad Nacional de Colombia
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The sustainable expansion of bean cultivations requires tech-nologies that do not limit their phyto-recovering properties.Therefore, the objective of this study was to propose agronomicmanagement of conservation for bean cultivation consideringthe microbiological characteristics of two mega-environmentsof the Colombian Caribbean coast and the compatibility be-tween agrochemicals and bioinputs. The methodology includedrhizospheric microbe population counts, identification ofphytopathogenic fungi in plant tissues and soils, compatibilitystudies of pesticides with biocontrollers,and determinationof residual contents of pesticides in bean seeds. The microbialpopulations corresponded to those previously registered for thelower tropics, but with quantitative differences in the genera.Phytophthora, ColletotrichumandFusariumwere registeredin the humid Caribbean, whileColletotrichumandCurvulariaaffectedcrops in the dry Caribbean. TheBeauveriabioinputwas not compatible with the evaluated agrochemicals, whileTrichodermawas compatible with chlorpyrifos, thiabendazoleand oxycarboxin.Metarhiziumwas compatible with glyphosateand oxycarboxin at 10% of the recommended dose. Lindaneresidues were found in the beans harvested at three of the stud-ied locations. The combined use of agrochemicals and bioinputson bean crops is feasible as long as the time of application ofthe latter is made according to the half-life of the chemical andthe organic matter content of the soil is increased.
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Agrociencias