Research Article Open Access

Trichoderma sp Native from Chili Region of Poanas, Durango, Mexico Antagonist against Phytopathogen Fungi

Gabriela Barragan Valencia1, Vicente Hernandez Vargas1, Jose Natividad Uribe Soto1, Nestor Naranjo Jimenez1 and Jesus Herrera Corral1
  • 1 Interdisciplinary Research Centre for Integral Regional Development-Durango, National Polytechnique Institute (CIIDIR-Dgo.-IPN). Project SIP: 20100421, Sigma 119, Fracc.: 20 de Noviembre II, Durango, Dgo., 34220,, Mexico


Problem Statement: Presence of Trichoderma spp. in agricultural soils decrease incidence of diseases by phytopathogen fungi. Sanity diagnostic require to know if exist beneficial microorganism and what agricultural practices help to their propagation. Approach: Samples (30) were taken from soils and sick plants of ten sites in four localities of Valley of Poanas. Phytophthora capsici Leo, Rhizoctonia solani Kuhn and Trichoderma sp were isolated in agar V8 and were identified by microscopy. Results: In the 30 samples analyzed the presence of Phytophthora capsici Leo and Rhizoctonia solani Kuhn was determined. Two isolations of Trichoderma sp were obtained from soil, they had antagonist activity against to P. capsici and R. solani on agar-V8 medium and showed chitinase activity. Sugar production in chitinase (10 mg.mL-1) by crude extract of Trichoderma growth in basal medium more chitin was determined. The average of sugar production from strains were 0.1175 and 0.1125 mg.mL-1 and standard deviations were 0.0567 and 0.0567 in four repetition. Interviews were applied to fifty farmers about cultivars and cultivation practices. At least seven types of chili were cultivated in the region of the Valley of Poanas, inorganic fertilization, irrigation systems by channel, gates and pumps were used. One hundred percent of farmers reported diseases of Damping off and Phytophthora root. Biocides were not used to control these diseases. Conclusion: The natural presence of Trichoderma spp was detected in Valley of Poanas, but some practices as inorganic fertilization and irrigation system can be contributing to propagation of phytopathogen fungi.

American Journal of Agricultural and Biological Sciences
Volume 6 No. 2, 2011, 185-188


Submitted On: 22 October 2010 Published On: 4 June 2011

How to Cite: Valencia, G. B., Vargas, V. H., Soto, J. N. U., Jimenez, N. N. & Corral, J. H. (2011). Trichoderma sp Native from Chili Region of Poanas, Durango, Mexico Antagonist against Phytopathogen Fungi. American Journal of Agricultural and Biological Sciences, 6(2), 185-188.

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  • Damping off
  • Phytophthora root rot
  • chitinase activity
  • phytopathogen fungi
  • Trichoderma spp
  • Capsicum annuum
  • sick plants
  • antagonist microorganism
  • antagonist activity