Canadian Forest Service Publications

Phaeotheca dimorphosa as a potential biocontrol agent for shoot blight caused by Gremmeniella abietina. 1995. Yang, D.; Laflamme, G.; Bernier, L.; Dessureault, M. Canadian Journal of Plant Pathology 17: 7-12.

Year: 1995

Available from: Laurentian Forestry Centre

Catalog ID: 16997

Language: English

CFS Availability: PDF (request by e-mail)

Abstract

An isolate of Phaeotheca dimorphospora from an elm (Ulmus americana) branch was tested for its capacity to suppress shoot blight caused by Gremmeniella abietina on red pine (Pinus resinosa) seedlings. In vitro germination of G. abietina conidia was strongly inhibited by P. dimorphospora microconidia. In a greenhouse bioassay, P. dimorphospora established itself on the foliage of red pine seedlings without causing any ill effects. A summer application of P. dimorphospora microconidia to the foliage of G. abietina-inoculated seedlings significantly reduced the disease severity in the following year, compared with the nontreated control. These results suggest that P. dimorphospora has potential in biocontrol of this shoot blight on red pine.

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