Revista Chapingo Serie Ciencias Forestales y del Ambiente
Universidad Autónoma Chapingo
Declaración de privacidad

 
 

 

 

 
Revista Chapingo Serie Ciencias Forestales y del Ambiente
Volume XXV, issue 3, September - December 2019
play_arrow
play_arrow
play_arrow

Biocontrol de Trichoderma harzianum Rifai sobre Fusarium circinatum Nirenberg & O´Donnell en plántulas de Pinus greggii Engelm. ex Parl. en tres sustratos
Trichoderma harzianum Rifai as a biocontrol of Fusarium circinatum Nirenberg & O´Donnell in seedlings of Pinus greggii Engelm. ex Parl. in three substrates

Silvia E. García-Díaz; Arnulfo Aldrete; Dionicio Alvarado-Rosales; David Cibrián-Tovar; José T. Méndez-Montiel

http://dx.doi.org/10.5154/r.rchscfa.2018.12.088

Received: 2018-12-07

Accepted: 2019-06-12

Available online: 2019-06-13 / pages.353-367

 

picture_as_pdfDownload cloudxml picture_as_pdf View Online
  • descriptionAbstract

    Introduction: Damping-off is a common disease in forest nurseries that causes significant economic losses worldwide. 
    Objective: To evaluate the pathogenicity and incidence of Fusarium circinatum Nirenberg & O´Donnell in seedlings of Pinus greggii Engelm. ex Parl., and the use of Trichoderma harzianum Rifai as a biocontrol in three substrates. 
    Materials and methods: The phytopathogenic fungus F. circinatum (strain SF5) and the antagonist T. harzianum (commercial strain T-22 KRL-AG2) were inoculated into P. greggii.  Three substrates based on peat moss, pine sawdust and pine bark were used. The incidence of the disease and the morphological indices of the plant (stem diameter, height, aerial dry weight/root dry weight ratio, slenderness index and Dickson quality index) were evaluated. The data were subjected to an analysis of variance (GLM procedure of SAS version 9.0) and Tukey's multiple comparison test (P ≤ 0.05). 
    Results and discussion: Pathogenicity was tested using Koch's postulates. The incidence of the disease was high (> 93 %) in substrates based on peat moss and pine bark, and was lower in the sawdust-based substrate (78 %). Trichoderma harzianum and the sawdust-based substrate reduced the incidence to 66 %. Plant quality, based on the morphological indices, was highest in the peat moss substrate.
    Conclusion: Fusarium circinatum is pathogenic in P. greggii; the sawdust-based substrate and T. harzianum reduced the incidence of the disease in the seedlings. 

    Keyworks: Damping-off; antagonist; peat moss; sawdust; pine bark
  • beenhereReferences
      No disponibles por el momento
  • starCite article

    García-Díaz, S. E.,  Aldrete, A., Alvarado-Rosales, D., Cibrián-Tovar, D., &  Méndez-Montiel, J. T. (2019).  Trichoderma harzianum Rifai as a biocontrol of Fusarium circinatum Nirenberg & O´Donnell in seedlings of Pinus greggii Engelm. ex Parl. in three substrates. Revista Chapingo Serie Ciencias Forestales y del Ambiente, XXV(3), 353-367. http://dx.doi.org/10.5154/r.rchscfa.2018.12.088