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Orange-yellow raspberry leaves #746648
Asked April 27, 2021, 6:37 PM EDT
Delaware County Ohio
Expert Response
Dear Rex,
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YOUR QUESTION #0016579:
Orange-yellow raspberry leaves
I have a small raspberry garden of about 50 canes. I have four canes that look different than the rest. They are not as far along as the others, the shoots are just now coming out, but the big difference is the color. The are an orange-yellow. If it were fall I would suspect leaf rust. All the shoots on these four canes are this color. If they're diseased I know I should take them out. Is it possible it is just a different variety? The four canes are all coming from the same area. All the canes are from wild volunteers that I've made into a little bed. In the attached picture, the suspect leaves are from shoots attached to the cane that crosses the image. The orange color is mainly on the fringes of the leaves. There are also normal leaves in the image from other nearby canes.Ask Extension offers one-to-one expert answers from Cooperative Extension/University staff and volunteers within participating Land-Grant institutions across the United States.
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More information. I don't see any raspberry disease images on the web that look like my symptoms. These shoots are from a region of the garden that had "roundup" sprayed on it last spring. The plants in the area lived, but did not fruit. Is it possible that this is residual roundup damage?
https://ipm.illinois.edu/diseases/rpds/710.pdf
The above is a link to growing different varieties of raspberries. While the volunteer raspberries that you transplanted in a bed grow locally they can be harmed by temperature variations. Did you cover your raspberries with the recent temperature drop and snow or did they have some overhead cover from trees? Is there a chance that those few canes were not under the cover and were affected by the low temperatures rather than disease? How many years has this bed been there? From your photo, the leaves on those canes simply looked like they were behind in growth. If you look at the photo in the link for leaf curl, you leaves don't resemble that disease at all. If you had issues with some of the canes last year you might have some problems in the same area this year. You indicated that you have already pulled those canes out. For peace of mind, and with 46 other canes you will like get enough raspberries for yourself and to share. Just keep an eye on the other canes.
Good luck with your raspberry bed.
