Antagonism studies of Trichoderma sp.p.. with Fusarium oxysporum and Rhizoctonia solani
Several experiments were conducted to study the antagonism of 17 isolates of Trichoderma from Colombian soils with Fusarium oxysporum and Rhizoctonia solani. In "in vitro" tests, a high antagonism between colonies was found being greater the antagonism of Trichoderma with R. solani. At the microscopic level it was observed a great interaction between T. harzianum and T. hamatum with R. solani in such a way that the hyphae of the pathogen showed coiling, penetration, fragmentation and lysis. The Trichoderma isolates caused reduction in the disease severity, in the incubation period and a lower number of diseased cucumber plants when they were inoeulated with F. oxysporum f. sp, cucumerinum and these effects were better than Benomyl application. The same Trichoderma isolates increased seed germination, emergence and seedling size of bean plants inoculated with R. solani. A reduction of the disease severity was also found.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias
1989
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| Online Access: | https://revistas.unal.edu.co/index.php/agrocol/article/view/20982 |
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