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crab apple tree ---black spots on leaves how to treet #875032

Asked June 27, 2024, 7:03 PM EDT

We noticed black spots on our blossoming crab apple tree. How do we treat it?

Ramsey County Minnesota

Expert Response

If the spots are on the leaves, its likely to be apple scab.
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/crabapple/leavesspots.html
"Whats wrong with my plant" app and then select deciduous trees and then crab apple will reveal other possible problems.
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/crabapple/index.html

Linda G Tenneson, Benton County Extension Master Gardener & Tree Care Advisor Replied June 27, 2024, 9:18 PM EDT

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This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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