Journal of the Selva Andina Research Society
versão impressa ISSN 2072-9294versão On-line ISSN 2072-9308
Resumo
NINA, Rudy; SMELTEKOP, Hugh; ALMANZA, JC e LOZA-MURGUIA, Manuel. Evaluation of biocontrol ability of native strains of Trichoderma spp on Rhizoctonia and Fusarium sp in coffee (Coffea arabica) in experimental conditions. J. Selva Andina Res. Soc. [online]. 2011, vol.2, n.1, pp.43-52. ISSN 2072-9294.
Due to the indiscriminate use agrochemicals in conventional agriculture, it is causing pollution problems in the environment (soil, air and water), hence the search for alternatives that contribute to agricultural production by agro-chemical free sustainable production. This paper studies the biological control of damping off in coffee (Coffea arabica) by applying antagonistic fungus Trichoderma sp. Under experimental conditions at laboratory facilities of the Academic Unit Carmen Pampa Campesina, a community of Carmen Pampa, Township Coroico. The aim of this study was to biologically control the "damping off", they found two genera that cause damping off in seedbed of coffee: Rhizoctonia sp. and Fusarium sp.To determine the percentage of growth and control in the culture medium, we used the method of counting quarters, where they gave the mycelial growth of antagonistic fungus Trichoderma sp., And the fungal pathogens Rhizoctonia sp. and Fusarium sp. Statistically there was a highly significant difference in the variable growth rate of Trichoderma sp. on pathogenic fungi Rhizoctonia sp. and Fusarium sp. at 3, 6 and 9 days that announces the time factor and treatments are interdependent. The control variable showed a highly significant difference in the time factor and treatment, but the interaction shows no significant difference this makes known factors that are independent, so the fungus Trichoderma sp. not depend on time in treatment, thus showing its inhibitory power to Rhizoctonia sp. and Fusarium sp .. This test gives references that there is antagonistic fungus control on the fungal pathogens Rhizoctonia sp. and Fusarium sp.
Palavras-chave : Rhizoctonia; Fusarium; Trichoderma; damping off; pathogenic fungi; biocontrol.