Help Identify Needle Problem-Japanese Black Pine

Horticulture
1

Hi everyone, can you help me identify this problem? It looks like it could be blight?

I’m thinking of spraying them with copper fungicide.

Thanks!

Bigger Tree 1
Bigger Tree 11154×866 384 KB
Bigger Tree 2
Bigger Tree 21154×866 296 KB
Bigger Tree 3
Bigger Tree 31154×866 385 KB
Japanese Black Pines
Japanese Black Pines1154×866 466 KB
Smaller Tree
Smaller Tree1154×866 383 KB

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2

Based on the yellowing tips, it looks like over watering or a root health related issue. In all of those pictures I only see one needle (pic 3) that looks like it has the banding associated with a fungal issue. Reduced root health due to imbalance of water and oxygen can also increase susceptibility to needle cast and other diseases.

5 Likes
3

Did you figure out the problem? If so what did you do?
Thanks,
Clint

1 Like
4

Dothistroma. It has been a long battle. It got real bad but it is doing better now. Lost a lot of needles. A combination of paying a lot more attention to watering, copper spray, and daconil. I think there are some videos here that talk about needle cast/dothistroma.

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