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United States Department of Agriculture

Agricultural Research Service

Research Project: SMALL FRUIT AND ORNAMENTAL GENETIC RESEARCH FOR THE MID-SOUTH

Location: Southern Horticultural Research

Title: Effects of Shading on Cercospora Leaf Spot in Bigleaf Hydrangea

Authors
item Li, Yonghao - UNIV OF TENN
item Windham, Mark - UNIV OF TENN
item Trigiano, Robert - UNIV OF TENN
item Rinehart, Timothy
item Spiers, James
item Reed, Sandra

Submitted to: Southern Nursery Digest
Publication Type: Trade Journal
Publication Acceptance Date: September 22, 2008
Publication Date: January 1, 2009
Citation: Li, Y., Windham, M.T., Trigiano, R.N., Rinehart, T.A., Spiers, J.M., Reed, S.M. 2009. Effects of Shading on Cercospora Leaf Spot in Bigleaf Hydrangea. Trade Journal Publication. Winter. 1:31.

Technical Abstract: Shading densities significantly affected disease severities of Cercospora leaf spot on bigleaf hydrangeas. In general, lower disease severities were associated with higher shading densities. However, significantly differences in disease severities among cultivars could not be detected in higher shading densities with 90% and 60% shade. These results suggest that planting bigleaf hydrangeas under shade could be an effective component in integrated management of the disease. Screening of bigleaf cultivars for leaf spot resistance needs to be conducted under full-sun or low shading density to avoid false conclusions.

Last Modified: 7/25/2014
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