Gliocladium virens in an alginate prill ineffective as a biological control of Fusarium root disease in container-grown Douglas-fir |
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Authors: | R. Kasten Dumroese Robert L. James David L. Wenny |
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Affiliation: | (1) Forest Research Nursery, Department of Forest Resources, University of Idaho, 83844-1137 Moscow, Idaho, USA;(2) USDA Forest Service, Insect and Disease Management, Coeur d'Alene, Idaho |
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Abstract: | An alginate prill formulation of Gliocladium virens (GL-21) was added as a top-dressings (54 g per m2) or incorporated into medium (1.2 kg per m3) used to grow Douglas-fir seedlings in styrofoam containers. Seedlings in the top-dress treatment were similar to control seedlings; infection and colonization by naturally-occurring Fusarium was unaffected by treatment. Incorporated G. virens reduced seedling growth and increased occurrence and colonization intensity of Fusarium. In a laboratory experiment, inoculating Douglas-fir seedlings with G. virens (10% w/w) prior to inoculation with Fusarium increased survival time when compared to concurrent inoculations of fungi.University of Idaho, Idaho Forest, Wildlife and Range Experiment Station Contribution No. 742. |
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Keywords: | Fusarium oxysporum Fusarium proliferatum seedling growth seedling infection germinants virulence |
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