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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5820
Vol. 77, No. 4, 2017, pp. 318-324
Bioline Code: cj17040
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 77, No. 4, 2017, pp. 318-324

 en Trichoderma check for this species in other resources strains as growth promoters in Capsicum annuum check for this species in other resources and as biocontrol agents in Meloidogyne incognita
Herrera-Parra, Elizabeth; Cristóbal-Alejo, Jairo & Ramos-Zapata, José A.

Abstract

The Trichoderma species act as plant symbionts, decomposers of organic material, and as antagonists of root phytoparasites. To estimate the potential of four native strains of Trichoderma as growth promoters of Capsicum annuum L. and as biocontrol against root knot nematode Meloidogyne incognita (Kofoid and White) Chitwood, two bioassays in greenhouse were established. In one, the capacity of Trichoderma to promote initial growth of seedlings (36 d after planting, dap) was evaluated. In the other, the biocontrol of Trichoderma against M. incognita at 96 dap was also evaluated. The Trichoderma strains and the chemical fertilization treatment significantly promoted seedling growth at 36 dap (P ≤ 0.01). With respect to the control, T. atroviride check for this species in other resources promoted greater height in the seedlings, while T. atroviride, T. virens check for this species in other resources and T. harzianum check for this species in other resources -C2 increased fresh weight in roots (60.14%) and both T. atroviride and T. harzianum-C2 produced up to 82.30% more dry root biomass. In biocontrol, the control plants registered the highest damage with galling indexes of 85.50% (P ≤ 0.01). The lowest galling indexes were estimated with all the Trichoderma strains (21.60% to 35%). Trichoderma atroviride reduced egg production by 63% and the production of females by 14.36%, with respect to the oxamyl nematicide. Biocontrol of the nematode through the application of the Trichoderma strains favored growth of the plants in general. The fungal species studied show potential as growth promoting agents and as biocontrol agents M. incognita in C. annuum.

Keywords
Antagonistic fungi; interaction; root-knot nematodes; sweet pepper.

 
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