Biocontrol capacity of wild and mutant Trichoderma harzianum (Rifai) strains on Rhizoctonia solani 618: Effect of temperature and soil type during storage

Jaime Montealegre, Luis Valderrama, Rodrigo Herrera, XIMENA ALEJANDRA BESOAIN CANALES, Luz M. Pérez

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Wild (Th11, Th12 and Th650) and mutant (Th11A80.1, Th12A40.1, Th12C40.1 and Th650-NG7) Trichoderma harzianum strains were stored for 180 days at 5°C or at 22°C, in two types of soils. Strains recovered at 90, 120 and 180 days from the two types of soils, retained their full capacity to biocontrol Rhizoctonia solani 618, that produces crown and root rot of tomatoes. Recovery, estimated as colony forming units (cfu) of the wild and mutant strains, showed that all increased their cfu after storage independently of the type of soil and temperature, although kinetic behavior differed among strains. Ratios of recovery after storage in type B soil/ type A soil or at 22°C/5°C, higher or lower than one respectively, allowed to establish that Th11 and Th12 were the most appropriate strains for the biocontrol of R. solani in conditions where growth of the phytopathogen is optimal.

Original languageEnglish
JournalElectronic Journal of Biotechnology
Volume12
Issue number4
DOIs
StatePublished - 15 Oct 2009

Keywords

  • Bioantagonism
  • Persistence
  • Root rot
  • Tomato

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