Raspberry Plants
Q.

Light Tan Spots on Black Raspberries

dharlinger added on July 6, 2011 | Answered

I have 3 year old black raspberry plants. They are loaded with berries but some of the berries have light tan spots. I'm not sure what the cause of this is and how to fix the problem.

A.
A.Answers to this queston: Add Answer
Heather
Certified GKH Gardening Expert
Answered on July 11, 2011

It may be orange rust, which is dangerous for black raspberries. Typically, this disease appears on the leaves, but it can occasionally show in the fruit. Here is more information on that:
https://extension.psu.edu/plants/gardening/fphg/brambles/diseases/rust

It could be another form of fungus as well. You can treat the plant with fungicide, which will kill most fungus, but will not kill the range rust mentioned above.

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