North star Cherry Tree - Ask Extension
My approximately 12 year old Northstar cherry tree is exhibiting signs of a leaf fungus. Any recommendations? Thinking of trying Dawn dish soa...
Knowledgebase
North star Cherry Tree #877761
Asked July 18, 2024, 10:25 AM EDT
My approximately 12 year old Northstar cherry tree is exhibiting signs of a leaf fungus. Any recommendations? Thinking of trying Dawn dish soap.
Carver County Minnesota
Expert Response
My guess is the tree has some kind of leaf spot disease:
https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs
Usually preventative measures (fall cleanup, careful water management, etc.) can manage these diseases, but the wet weather this year has made this more challenging. At this stage, no treatment is necessary.
And, by the way, dishsoap is not a fungicide. Insecticidal soap is an insecticide (also not a fungicide). It is formulated for insect pests. Ordinary dishsoap may contain chemicals that can be harmful to your plants. Read here:
https://extension.umn.edu/yard-and-garden-news/coming-clean-soap-garden
Please note that cherries are one of the plants sensitive to soap.
https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs
Usually preventative measures (fall cleanup, careful water management, etc.) can manage these diseases, but the wet weather this year has made this more challenging. At this stage, no treatment is necessary.
And, by the way, dishsoap is not a fungicide. Insecticidal soap is an insecticide (also not a fungicide). It is formulated for insect pests. Ordinary dishsoap may contain chemicals that can be harmful to your plants. Read here:
https://extension.umn.edu/yard-and-garden-news/coming-clean-soap-garden
Please note that cherries are one of the plants sensitive to soap.
