Its only on a couple of them but I’m not sure whats going on. Any help is appreciated!
A picture of the underside would provide additional help.
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You have a heatwave?
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Mid/upper 80s, but nothing crazy. I was originally considering heat too but it just didn’t get hot enough for that in my opinion. And I’ve made sure that the plants are consistently well watered.
Fertilizer burn can look like that. Did the dog pee on it?
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Hey Drew, glad to see your back up on the forum. I hope all is well. No dogs/cats here, just using some organic trifecta plus.
Maybe just physical damage from whipping around in the wind. Also could be an early sign of cane borers. Usually a whole leaf cluster browns with one type of cane borer( yes more than one type). It could be early symptoms of some type of root problem. Rubus is susceptible to some root rots.
Hard to say. Keep observing them and report any changes.
Here my biggest problem is weather. Floricanes can start and fail from winter damage. Or from borers. I have both. It’s a good year I only lost six or so. Production is huge this year.
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Possible raspberry “spur blight”, a fungal disease.