Uso de microorganismos antagonistas, para el control de Alternaria solani en tomate (Solanum lycopersicum L), bajo condiciones controladas.
The tomato crop is threatened by multiple pests and diseases, among them Alternaria solani, which causes early blight, a disease that occurs throughout the crop cycle and generates high production losses. The control of this disease is usually done by chemical methods, but recently biological contro...
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| Format: | bachelorThesis |
| Jezik: | spa |
| Izdano: |
2024
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| Teme: | |
| Online pristup: | https://dspace.unl.edu.ec/jspui/handle/123456789/29137 |
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Dodaj oznaku | Sažetak: | The tomato crop is threatened by multiple pests and diseases, among them Alternaria solani, which causes early blight, a disease that occurs throughout the crop cycle and generates high production losses. The control of this disease is usually done by chemical methods, but recently biological control methods have been used, so in this study we worked with microbial suspensions adjusted to a concentration of 108, with Pseudomonas sp., Azotobacter sp. and Azospirillum sp, to determine the efficiency in the control of A. solani under controlled conditions, where an in vitro antagonistic confrontation was carried out and it was determined that the highest rates of inhibition of radial growth occurred in the treatment where Azotobacter sp. was applied (60.70 %), showing a good biocontrol potential, while the treatments with Azospirilum sp. (33.92 %) and Pseudomonas sp. (33.84 %), presented a poor control, compared to the control. In in vivo plants, the same bacteria were used (concentration 108), a chemical control based on Azoxytobin + Tebuconazole and an absolute control. Incidence, severity, ABCPE, ABCPEE, TPE, ECB and IS were evaluated, and in general it was observed that the chemical treatment controlled the disease more effectively, and the bacterial treatments reached statistically similar rates in the control of A. solani and in comparison with the absolute control, the biocontrol potential of the antagonistic bacteria used was noted. |
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