Blueberry Disease - Ask Extension
Our blueberry bushes have a disease that is browning the leaves after the blossoms are done blooming. What is it and how can I treat it?
Knowledgebase
Blueberry Disease #833844
Asked June 05, 2023, 1:15 PM EDT
Our blueberry bushes have a disease that is browning the leaves after the blossoms are done blooming. What is it and how can I treat it?
Ottawa County Michigan
Expert Response
Hello,
Based on what I see in your images - this appears to be leaf spot disease
BLUEBERRY IPM POST BLOOM – DISEASES PATHOGENS - Appears to be Anthracnose (C.) It will appear as stem, bud, and leaf lesions and may have orange spore masses. Infections will cause leaf browning and will move from the top of the leaf to the bottom. If untreated, anthracnose will also cause fruit to rot. Fungicides may be used to prevent further development of anthracnose during the green fruit development stage.
Look at Image C at this link: https://blog.umd.edu/umefruitveg/2021/05/24/blueberry-ipm-post-bloom-diseases-pathogens/
I highly recommend you get a confirmed diagnosis from an expert at the MSU Diagnostic Plant Lab. Please email your digital images prior to bringing or sending physical samples. Images can be sent to <personal data hidden>.
MAKE SURE IN THAT E-MAIL YOU INCLUDE YOUR NAME, ADDRESS, AND PHONE NUMBER!!
Be prepared. The lab may ask for more images - THE LAB WILL LET YOU KNOW IF A SAMPLE NEEDS TO BE SENT - There is a $20-25 dollar fee (if they need a sample sent).
Lab email: <personal data hidden>
Lab phone:<personal data hidden>
Hours of operation: Monday through Friday, from 8:00 AM to 5:00 PM.
PLEASE READ BELOW ON PREPARING YOUR SAMPLE (if the lab needs a sample)
From the lab: Please do not ship samples on Fridays. Due to the current COVID-19 circumstances, please allow additional processing time. They thank you for your patience and understanding.
Every sample must be accompanied by a completed submission form. Please place the form in a separate resealable bag to prevent it from getting damp or soiled. The form is at this link: https://www.canr.msu.edu/pestid/uploads/files/General_Sample_Submission_Form_May2022.pdf
Complete details of submitting a sample are at this link: https://www.canr.msu.edu/pestid/submit-samples/
Another reference:
Leaf Diseases of Blueberry Fruit Disease Information at this link: https://content.ces.ncsu.edu/leaf-diseases-of-blueberry
I hope this helps!
Based on what I see in your images - this appears to be leaf spot disease
BLUEBERRY IPM POST BLOOM – DISEASES PATHOGENS - Appears to be Anthracnose (C.) It will appear as stem, bud, and leaf lesions and may have orange spore masses. Infections will cause leaf browning and will move from the top of the leaf to the bottom. If untreated, anthracnose will also cause fruit to rot. Fungicides may be used to prevent further development of anthracnose during the green fruit development stage.
Look at Image C at this link: https://blog.umd.edu/umefruitveg/2021/05/24/blueberry-ipm-post-bloom-diseases-pathogens/
I highly recommend you get a confirmed diagnosis from an expert at the MSU Diagnostic Plant Lab. Please email your digital images prior to bringing or sending physical samples. Images can be sent to <personal data hidden>.
MAKE SURE IN THAT E-MAIL YOU INCLUDE YOUR NAME, ADDRESS, AND PHONE NUMBER!!
Be prepared. The lab may ask for more images - THE LAB WILL LET YOU KNOW IF A SAMPLE NEEDS TO BE SENT - There is a $20-25 dollar fee (if they need a sample sent).
Lab email: <personal data hidden>
Lab phone:<personal data hidden>
Hours of operation: Monday through Friday, from 8:00 AM to 5:00 PM.
PLEASE READ BELOW ON PREPARING YOUR SAMPLE (if the lab needs a sample)
From the lab: Please do not ship samples on Fridays. Due to the current COVID-19 circumstances, please allow additional processing time. They thank you for your patience and understanding.
Every sample must be accompanied by a completed submission form. Please place the form in a separate resealable bag to prevent it from getting damp or soiled. The form is at this link: https://www.canr.msu.edu/pestid/uploads/files/General_Sample_Submission_Form_May2022.pdf
Complete details of submitting a sample are at this link: https://www.canr.msu.edu/pestid/submit-samples/
Another reference:
Leaf Diseases of Blueberry Fruit Disease Information at this link: https://content.ces.ncsu.edu/leaf-diseases-of-blueberry
I hope this helps!
