Hello,

Based on the symptoms you’ve described and the images that you provided, it’s possible that your red raspberries are affected by one of the following diseases:

Spur Blight: This fungal disease infects the leaves and nodes (where leaves grow) of raspberry canes. Look for small brown circles on the leaves, which eventually turn yellow and cause wilting. Spur blight is most severe in red raspberries. More information is at this link:

Raspberry cane diseases | UMN Extension

Anthracnose: Another fungal disease that affects the parts of the cane between the leaves (internodes). It can cause damage to both black and red raspberries. Symptoms include brown spots on the canes, which may lead to wilting and dieback. More information is at this link:

Raspberry cane diseases | UMN Extension

Late Leaf Rust: This disease specifically infects red and black raspberries. Infected leaves and fruit develop powdery yellow spots. To manage it, ensure good air circulation, plant in narrow rows, and remove weeds frequently. More information at this link:

Late leaf rust on raspberry | UMN Extension

Verticillium Wilt: Although more severe in black raspberries, this soilborne fungal disease can also affect red raspberries. It causes wilting, stunting, and can eventually kill the fruiting cane or the entire plant. More information at this link:

Verticillium Wilt of Raspberry | Ohioline (osu.edu)

To accurately identify the disease, closely examine your raspberry canes. If possible, consult with a the MSU Plant & Pest Diagnostics Lab. I recommend you send all your images by e-mail to the MSU Plant & Pest Diagnostics Lab for a confirm and precise identification. The experts there can also provide you with the best treatment options. Their email is <personal data hidden> - Please include your name – The lab will let you know if they need a sample sent. FYI – The lab may also ask for additional images too.

Their website is at this link:

Plant & Pest Diagnostics (msu.edu)

Their Contact Information is at this link:

Contact Us - Plant & Pest Diagnostics (msu.edu)

If the lab wants you to submit a sample, this link will explain the details on submitting a sample to MSU Plant & Pest Diagnostics Lab:

Submit Samples - Plant & Pest Diagnostics (msu.edu)

Still implement proper management practices, such as maintaining narrow beds, removing infected canes, and ensuring good air circulation, to help control the spread and save your raspberry plants.

I hope this helps!