Sensitivity of wild-type and mutant Trichoderma harzianum strains tofungicides
The germination of conidia in wild-type (Th11, Th12 and Th650) and mutant (Th11A80.1, Th12A10.1 and Th650-NG7) strains of Trichoderma harzianum that were exposed to different commercial fungicides was studied. All wild-type and mutant Trichoderma strains were germinated in the presence of 1,700 mg L-1 of pencycuron. The wild-type strains Th12 and Th650 and the corresponding mutant strains Th12A10.1 and Th650-NG7 were sensitive to all concentrations of iprodione and metalaxil + mancozeb. The EC50 (Median Effective Concentration) values for the different fungicides were between 10-1 and 10-4 less than the concentrations recommended for field applications; one exception was Phyto-fos on Th650-NG7, where this ratio was 0.72. These results establish whether some of these fungicides can be used in combination with the biocontrol agents evaluated.
Main Authors: | , , , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
2012
|
Online Access: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300016 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|