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Fusarium root rot of coneflower seedlings and integrated control using Trichoderma and fungicides
- Source :
- BioControl. 50:317-329
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 2005.
-
Abstract
- Fusarium root rot (Fusarium spp.) is one of the most important seedling diseases of coneflower (Echinacea spp.) in Alberta greenhouses. Effects of microbial antagonists (Trichoderma spp.) and fungicides, including difenoconazole, fludioxonil, and a mixture of fludioxonil, metalaxyl and difenoconazole, on the management of this disease, were investigated in Alberta. Twenty Trichoderma isolates demonstrated antagonistic activity to Fusarium in agar plate bioassays, with inhibition rates ranging from 44 to 65%. Some Trichoderma isolates significantly ( p < 0.05) reduced disease incidence and severity on seedlings in greenhouse experiments. An in vitro bioassay indicated that difenoconazole and the mixture equally inhibited the growth of both Fusarium and Trichoderma, but, while fludioxonil strongly inhibited the growth of Fusarium, it had little effect on Trichoderma, according to the dose--response models developed ( p < 0.01, R2= 0.902-0.998). Two Trichoderma isolates, T1 and T13 were applied singly or in combination with a low rate of fludioxonil in greenhouse evaluations. The results suggested that fludioxonil and Trichoderma could be integrated into a disease management program for fusarium root rot in coneflower.
- Subjects :
- Fusarium
biology
Echinacea angustifolia
technology, industry, and agriculture
food and beverages
macromolecular substances
Fludioxonil
biology.organism_classification
complex mixtures
Fungicide
Horticulture
chemistry.chemical_compound
chemistry
Agronomy
Insect Science
Trichoderma
Root rot
Agronomy and Crop Science
Fusarium solani
Metalaxyl
Subjects
Details
- ISSN :
- 15738248 and 13866141
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- BioControl
- Accession number :
- edsair.doi...........4859dd7ea172bef35f4ab18b34762fa0