Location: Southern Horticultural Research
Title: Visual and electronic comparisons of detached strawberry leaves inoculated with two Colletotrichum species Authors
Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: August 8, 2012
Publication Date: September 1, 2012
Citation: Miller Butler, M.A., Curry, K.J., Kreiser, B.R., Smith, B.J. 2012. Visual and electronic comparisons of detached strawberry leaves inoculated with two Colletotrichum species. Phytopathology. 102:S2.8. Technical Abstract: Inoculation of detached strawberry leaves with Colletotrichum species may provide an accurate, rapid, non-destructive method of identifying anthracnose resistant germplasm. The purpose of this study was to compare two methods for screening anthracnose resistance. Detached leaves of 60 susceptible and 25 resistant strawberry clones were inoculated with one Colletotrichum gloeosporioides isolate and two C. fragariae isolates. Anthracnose disease symptoms were assessed quantitatively via computer based image analysis and qualitatively by two independent raters and the assessments were compared statistically. There was a strong positive correlation between percent lesion area determined by the computer analysis and the visual disease scores of the two raters. Image analysis provided a precise measurement of percent lesion area of infected leaves while visual assessment provided rapid results.