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- Title
Suppression of the phytopathogens Sclerotinia sclerotiorum and Sclerotium rolfsii by Trichoderma spp.
- Authors
Montalvão, Sandro Coelho Linhares; Marques, Eder; Martins, Irene; da Silva, Joseane Padilha; de Mello, Sueli Correa Marques
- Abstract
This work was carried out to evaluate the antagonism of Trichoderma isolates to the soil-borne plant pathogenic fungi Sclerotinia sclerotiorum and Sclerotium rolfsii. Thirty-four antagonist fungal strains were used. In the dual culture tests, Trichoderma isolates CEN281 and CEN287 stood out, both belong to the species T. afroharzianum and originate from soil cultivated with cotton. The folding, deformation and hyphal penetration effects of the pathogens were confirmed under microscopy in all the Trichoderma isolates. In the volatile metabolites production assays, no inhibition of S. sclerotiorum growth was observed. On the other hand, six isolates were able to inhibit S. rolfsii, including CEN1075 (T. asperellum) which originates from the tomato rhizosphere. As for the production of non-volatile metabolites, 11 isolates, mostly obtained from soil samples from the tomato rhizosphere, showed action against both pathogens. Regarding the damping-off of tomato seedlings caused by S. rolfsii, it was observed that the Trichoderma isolates CEN281 and CEN126 were the ones that most suppressed the disease, and both were isolated from the rhizosphere of this plant. This work allowed the selection of new Trichoderma isolates with potential antagonistic to the important soil fungi in question. The isolates CEN281, CEN1070 and CEN1080 showed the best results in controlling the damping-off of tomato seedlings and, therefore, will be evaluated in field studies.
- Subjects
SCLEROTIUM rolfsii; SCLEROTINIA sclerotiorum; TRICHODERMA; ANTAGONISTIC fungi; PATHOGENIC fungi; SOIL fungi
- Publication
Biologia, 2023, Vol 78, Issue 10, p2941
- ISSN
0006-3088
- Publication type
Article
- DOI
10.1007/s11756-023-01457-9