Marchitez por Fusarium oxysporum Schlthl en masaguaro (Pseudosamanea guachapele) (Kunth).

Abstract

Introduction— The masaguaro (Pseudomanea Guachapele) was used in reforestation by the” Fundación Orinoquia Biodiversa” in Arauca, and it presented an unknown wilting.

Objective— Characterize the disease and its causal agent, and evaluate the possibilities of chemical and biological control of the disease.

Methodology— The research was carried out in Campo Alegre Arauquita neighborhood (Arauca, Colombia). The samples were analyzed in the microbiology laboratory of the University of Pamplona. The disease and its causal agent were characterized, the incidence and severity of the disease were determined and the monetary losses considering the dead plants, were estimated. A wilting control experiment using benomyl and Bacillus subtilis was carried out, comparing them to a control without treatment. Fusarium oxysposum was determined as the causal agent.

Results— Fusarium oxysporum was identified as causal agent of the disease. Wilting reached between 13% and 54% of incidence. The economic losses were estimated at more than 19 million pesos/ha.

Conclusion— The preventive and eradicative action of benomyl and only preventive action of B. subtilis were verified.