Ask a Question forum→Blueberries with reddish brown spots on leaves

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Northern California
Mercurianmad
May 20, 2020 7:21 PM CST
OK guys this is the third post I think saying that I have something wrong with my blueberry plants and everybody always tells me that the plants look fine.

The entire group of leaves, new growth and old of my five blueberry plants have begun to developed red brown spots on them. Is this some type of fungus? I have a systemic fungicide that I can use on it if it is. I just wanna know before I spray all the plants.
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
May 20, 2020 7:38 PM CST
I don't grow blueberries but have you looked into Blueberry rust? Just a thought...
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oneeyeluke
May 22, 2020 3:36 AM CST
Give them some time and keep the water down to a minimum. That's not blueberry rust, but it may be from the cool Northern California nights. They will get better in the summer if you don't over water them. Phosphorus is less mobile when the temps are cold and will show up in the leaves as red or purple tent. I never use any kind of systemic fungicide on anything I eat or give away. I hope that helps.
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BigBill
May 22, 2020 3:44 AM CST
I agree 110% with Luke. I would never spray something I was planning on eating.
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Northern California
Mercurianmad
May 22, 2020 5:56 AM CST
Thank you. Is that what those red spots are? Phosphorus deficiency? If you click on the close up of the pictures you can really see them. We've just had over a week of heavy rain in May, for some reason, with cloud cover. The sun is back now so hopefully that helps them out.

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