Liming with dolomite reduces the efficacy of the biocontrol fungus Trichoderma koningiopsis against cabbage clubroot

Cabbage clubroot is a major constraint for the production of cruciferous species. This research aimed to explore the effect of Trichoderma koningiopsis (as the wettable powder formulated product Tricotec®) and dolomite on the disease and crop growth of cabbage. This study was carried out in a field with a prolonged history of clubroot incidence. The trial was set up in a randomized complete block design with five repetitions. The following treatments were applied: 0) absolute control; 1 and 2) liming with dolomite at 1.0 and 2.1 t ha-1; 3) Tricotec® at 200 g ha-1; 4) combination of treatments 1 and 3; 5) combination of treatments 3 and 4. The treatment with just Tricotec® applications gave the lowest disease incidence and severity and the heaviest plant dry weight. Joint applications of Tricotec® and dolomite at 2.1 t ha-1 reduced the crop growth variables and had the highest disease intensity. The Trichoderma concentration in the soil was increased by a factor of 10 in the plots that received just Tricotec®, but not in the limed plots. These results showed that T. koningiopsis, in a Tricotec® formulation, is a promising candidate for the control of cabbage clubroot and that its biological activity is affected by dolomite when applied jointly at 2.1 t ha-1.

• Autores: Botero, Andrea; Gómez, Iván; Benítez, Édgar; García, Celsa
• Tipo de recurso: Article of journal
• Fecha de publicación: 2015
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/58499
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/58499; http://bdigital.unal.edu.co/55282/
• Palabra clave: 57 Ciencias de la vida; Biología / Life sciences; biology; 58 Plantas / Plants; biological control; plasmodiophorida; soil-borne pathogens; Rhizaria; agricultural lime
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional