Abstract
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 wildtype 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.
Translated title of the contribution | Sensitivity of wild-type and mutant Trichoderma harzianum strains to fungicides |
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Original language | English |
Pages (from-to) | 569-576 |
Number of pages | 8 |
Journal | Ciencia e Investigacion Agraria |
Volume | 39 |
Issue number | 3 |
DOIs | |
State | Published - Dec 2012 |
Keywords
- Biocontrol
- Biocontrol agents
- Control of tomato root diseases
- Fungicide tolerant Trichoderma
- Fungicides
- Integrated management