Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia

Q. A. Holtslag; W. R. Remphrey; W. G.D. Fernando; R. G. St-Pierre; R. Dill-Macky

doi:10.1080/07060660309507092

Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia

Q. A. Holtslag, W. R. Remphrey, W. G.D. Fernando, R. G. St-Pierre, R. Dill-Macky

Plant Pathology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Amelanchier alnifolia, commonly known as saskatoon, is a fruit-bearing shrub native to the Canadian Prairies. Currently, production is limited by the fungal pathogen Entomosporium mespili. It was found that there is a positive linear relationship between the relative concentration of E. mespili conidia (X) and the percent of saskatoon leaf area that is infected (Y), as represented by the equation Y = 0.0534X. In a field study, initial disease symptoms appeared 5 d after the first precipitation event that occurred 1 d or more after the date of flowering. A splash-dispersed-conidia trap was constructed and used to trap conidia within the canopy of a saskatoon plant and, in both years of this study, conidia were first trapped on the 184th day of the year, which coincided with the exponential increase of percent leaf area infected. Conidia were primarily released during the first 2 h of precipitation events. Information on inoculum production and release will eventually be integrated into a dynamic disease-forecasting model for entomosporium leaf and berry spot caused by E. mespili on saskatoon.

Original language	English (US)
Pages (from-to)	371-378
Number of pages	8
Journal	Canadian Journal of Plant Pathology
Volume	25
Issue number	4
DOIs	https://doi.org/10.1080/07060660309507092
State	Published - Dec 2003

Bibliographical note

Funding Information:
The support of the Agrifood Research and Development Initiative, the Agriculture Development Fund of Saskatchewan Agriculture, Food and Rural Revitalization, and the Prairie Fruit Growers Association of Manitoba are gratefully acknowledged. Special thanks are extended to the Small Grains Pathology Laboratory at the University of Minnesota, St. Paul, Minn., for assisting with the inoculum production study, to Guy Ash for help in analyzing the weather data, to Frank Labelle and Janice Deremiens for allowing the use of their saskatoon orchard, to Dr. Lakhdar Lamari for allowing the use of his prototype image-analysis software (Assess for Windows) and providing the required training, to Linda Pearn for assisting in orchard upkeep, and to Grant Mollard and Richard Hamel from the Department of Physics and Astronomy at the University of Manitoba for helping to design and build the splash-dispersed-conidia trap.

Keywords

Amelanchier alnifolia
Conidia release
Entomosporium leaf and berry spot
Entomosporium mespili
Inoculum production
Percent leaf area infected

Publisher link

10.1080/07060660309507092

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Holtslag, Q. A., Remphrey, W. R., Fernando, W. G. D., St-Pierre, R. G., & Dill-Macky, R. (2003). Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia. Canadian Journal of Plant Pathology, 25(4), 371-378. https://doi.org/10.1080/07060660309507092

Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia. / Holtslag, Q. A.; Remphrey, W. R.; Fernando, W. G.D. et al.
In: Canadian Journal of Plant Pathology, Vol. 25, No. 4, 12.2003, p. 371-378.

Research output: Contribution to journal › Article › peer-review

Holtslag, QA, Remphrey, WR, Fernando, WGD, St-Pierre, RG & Dill-Macky, R 2003, 'Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia', Canadian Journal of Plant Pathology, vol. 25, no. 4, pp. 371-378. https://doi.org/10.1080/07060660309507092

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title = "Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia",

abstract = "Amelanchier alnifolia, commonly known as saskatoon, is a fruit-bearing shrub native to the Canadian Prairies. Currently, production is limited by the fungal pathogen Entomosporium mespili. It was found that there is a positive linear relationship between the relative concentration of E. mespili conidia (X) and the percent of saskatoon leaf area that is infected (Y), as represented by the equation Y = 0.0534X. In a field study, initial disease symptoms appeared 5 d after the first precipitation event that occurred 1 d or more after the date of flowering. A splash-dispersed-conidia trap was constructed and used to trap conidia within the canopy of a saskatoon plant and, in both years of this study, conidia were first trapped on the 184th day of the year, which coincided with the exponential increase of percent leaf area infected. Conidia were primarily released during the first 2 h of precipitation events. Information on inoculum production and release will eventually be integrated into a dynamic disease-forecasting model for entomosporium leaf and berry spot caused by E. mespili on saskatoon.",

keywords = "Amelanchier alnifolia, Conidia release, Entomosporium leaf and berry spot, Entomosporium mespili, Inoculum production, Percent leaf area infected",

author = "Holtslag, {Q. A.} and Remphrey, {W. R.} and Fernando, {W. G.D.} and St-Pierre, {R. G.} and R. Dill-Macky",

note = "Funding Information: The support of the Agrifood Research and Development Initiative, the Agriculture Development Fund of Saskatchewan Agriculture, Food and Rural Revitalization, and the Prairie Fruit Growers Association of Manitoba are gratefully acknowledged. Special thanks are extended to the Small Grains Pathology Laboratory at the University of Minnesota, St. Paul, Minn., for assisting with the inoculum production study, to Guy Ash for help in analyzing the weather data, to Frank Labelle and Janice Deremiens for allowing the use of their saskatoon orchard, to Dr. Lakhdar Lamari for allowing the use of his prototype image-analysis software (Assess for Windows) and providing the required training, to Linda Pearn for assisting in orchard upkeep, and to Grant Mollard and Richard Hamel from the Department of Physics and Astronomy at the University of Manitoba for helping to design and build the splash-dispersed-conidia trap.",

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AU - Fernando, W. G.D.

AU - St-Pierre, R. G.

AU - Dill-Macky, R.

N1 - Funding Information: The support of the Agrifood Research and Development Initiative, the Agriculture Development Fund of Saskatchewan Agriculture, Food and Rural Revitalization, and the Prairie Fruit Growers Association of Manitoba are gratefully acknowledged. Special thanks are extended to the Small Grains Pathology Laboratory at the University of Minnesota, St. Paul, Minn., for assisting with the inoculum production study, to Guy Ash for help in analyzing the weather data, to Frank Labelle and Janice Deremiens for allowing the use of their saskatoon orchard, to Dr. Lakhdar Lamari for allowing the use of his prototype image-analysis software (Assess for Windows) and providing the required training, to Linda Pearn for assisting in orchard upkeep, and to Grant Mollard and Richard Hamel from the Department of Physics and Astronomy at the University of Manitoba for helping to design and build the splash-dispersed-conidia trap.

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Estimating inoculum production relative to percent leaf area infected and environmental conditions required for stimulating release of Entomosporium mespili conidia on Amelanchier alnifolia

Abstract

Bibliographical note

Keywords

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