Treatment for cherry shot hole disease - Ask Extension
Our recently planted (June 2023) Yoshino cherry tree has developed shot hole disease. I understand this may be a fungal infection and that treatment c...
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Treatment for cherry shot hole disease #841188
Asked July 17, 2023, 8:03 PM EDT
Our recently planted (June 2023) Yoshino cherry tree has developed shot hole disease. I understand this may be a fungal infection and that treatment can do nothing for this year's foliage. I've had recommendations re: use of fungicide to try to control next year. Can you provide some guidance that might help minimize problems? Thank you.
New Castle County Delaware
Expert Response
Hi. Thank you for your question. Shot Hole Fungus is common on Cherry in a wet growing environment.
https://extension.umd.edu/resource/cherry-shot-hole-disease#:~:text=Symptoms%20of%20cherry%20shot%20hole&text=Infected%20cherry%20tree%20leaves%20will,the%20tree%20is%20otherwise%20healthy.
https://henderson.ces.ncsu.edu/2023/05/pest-alert-shothole-disease-on-cherries/
Fungicide applications can help with this problem on newly planted trees or small trees:
https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-523D.pdf page - 4-15.
Cherry leaf spot (Blumeriella)
Fungicides: Chlorothalonil Propiconazole Myclobutanil Neem oil Potassium bicarbonate
Chemical Control: To prevent the disease on ornamental cherries, fungicide applications are recommended at regular intervals,starting when leaves first become fully mature and continuing until late summer.
Cultural Control: Rake and remove fallen leaves to prevent overwintering of fungal inoculum.
Precautions/Remarks: Severe defoliation reduces winter hardiness. Prolonging leaf retention by controlling the disease will improve winter hardiness of the tree.
Best regards,
Tracy
https://extension.umd.edu/resource/cherry-shot-hole-disease#:~:text=Symptoms%20of%20cherry%20shot%20hole&text=Infected%20cherry%20tree%20leaves%20will,the%20tree%20is%20otherwise%20healthy.
https://henderson.ces.ncsu.edu/2023/05/pest-alert-shothole-disease-on-cherries/
Fungicide applications can help with this problem on newly planted trees or small trees:
https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-523D.pdf page - 4-15.
Cherry leaf spot (Blumeriella)
Fungicides: Chlorothalonil Propiconazole Myclobutanil Neem oil Potassium bicarbonate
Chemical Control: To prevent the disease on ornamental cherries, fungicide applications are recommended at regular intervals,starting when leaves first become fully mature and continuing until late summer.
Cultural Control: Rake and remove fallen leaves to prevent overwintering of fungal inoculum.
Precautions/Remarks: Severe defoliation reduces winter hardiness. Prolonging leaf retention by controlling the disease will improve winter hardiness of the tree.
Best regards,
Tracy
