Biocontrol of root and crown rot in tomatoes under greenhouse conditions using Trichoderma harzianum and Paenibacillus lentimorbus. Additional effect of solarization

Jaime R. Montealegre, Rodrigo Herrera, Juan Carlos Velásquez, Polyana Silva, XIMENA ALEJANDRA BESOAIN CANALES, Luz María Pérez

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Trichoderma harzianum 650 (Th650) and Paenebacillus lentimorbus 629 (Pl629) selected earlier for their ability to control Rhizoctonia solani, Fusarium solani and F. oxysporum in vitro, were applied alone or combined with solarization (summer assay) and/or with methyl bromide (MeBr) (summer and winter assays) to a soil with a high inoculum level, for the control of tomato root rot caused by the complex F. oxysporum f. sp. lycopersici - Pyrenochaeta lycopersici - Rhizoctonia solani. Evaluations were also performed independently for root damage caused by P. lycopersici, and also for R. solani in the summer assay. MeBr decreased tomato root damage caused by the complex from 88.7% to 21.2% and from 78.4% to 35.7% in the summer and in the winter assay, respectively. None of the biocontrollers could replace MeBr in the winter assay, but Th650 and Pl629 reduced root damage caused by this complex in the summer assay. Treatments with biocontrollers were improved by their combination with solarization in this season. Independent evaluations showed that the positive control of Th650 towards R. solani and the lack of effect on P. lycopersici correlates well with the endochitinase pattern expressed by Th650 in response to these phytopathogens. Root damage caused by R. solani can be controlled at a similar level as it does MeBr in summer assays, thus representing an alternative to the use of this chemical fungicide for the control of this phytopathogen.

Original languageEnglish
Pages (from-to)249-257
Number of pages9
JournalElectronic Journal of Biotechnology
Volume8
Issue number3
DOIs
StatePublished - 15 Dec 2005

Keywords

  • Fusarium oxysporum
  • Lycopersicon esculentum
  • Pyrenochaeta lycopersici
  • Rhizoctonia solani
  • Solarization

Fingerprint Dive into the research topics of 'Biocontrol of root and crown rot in tomatoes under greenhouse conditions using Trichoderma harzianum and Paenibacillus lentimorbus. Additional effect of solarization'. Together they form a unique fingerprint.

Cite this