Aspen shoot blight

Asked June 19, 2016, 11:20 AM EDT

What fungicide will work to mediate Aspen shoot blight (shepherds crook)? I read online that the proper fungicide should say it specifically treats aspen tree shoot blight but I am unable to find any. Thanks

Lincoln County Wyoming trees and shrubs blight

1 Response

The reason you are not finding any fungicides for Venturia shoot blight on aspen is there aren't any specifically labeled for it. A general fungicide labeled for leaf spots might help, however.
Here are two fact sheets containing some information about the disease and managing it:
http://extension.colostate.edu/topic-areas/yard-garden/aspen-and-poplar-leaf-spots-2-920/
http://www.ipm.iastate.edu/ipm/info/plant-diseases/leaf-and-shoot-blight
Sanitation is key. As leaves and twigs drop, rake them, bag them, and remove them. This will help minimize the problem in succeeding years. You can also carefully prune out dead branches. Selective pruning to improve air movement, particularly in lower areas of the trees, will also help keep humidity down, and may help decrease disease severity.
Karen Panter