Whatever it is, bag up or burn any fallen leaves; the affected leaves may fall off and those should be disposed of also. Treat with a fungicide, try to eliminate any overhead watering going on, and try to ensure good airflow around the plant.
Forgot about that curse of a fungus...Apple cedar rust. Apple spot is just so common here in my neck of the woods. Pray it's not that.
you think this tree will benefit from defoliation?
Was told crabapple rust.
Symptoms on Apple and Crabapple
On leaves: Bright yellow/orange spots develop on the upper surface of the leaves in late spring. These spots gradually enlarge, becoming evident on the undersurface of the leaves as small bulges. In midsummer, these rust lesions develop hairlike, cylindrical tubes (hyphae), which release spores into the air that are blown to the juniper host. Infected leaves of apples and crabapples may drop, with defoliation more severe in dry summers. Galls that form on the juniper host do not become evident until July the next year, requiring two years for the fungus to complete its life cycle.
On twigs: The rust appears as a swollen corky gall on the current year’s growth, usually no more than 1 inch in length. The swelling eventually develops the characteristic cylindrical fruiting bodies. Seriously affected twigs are stunted and may die.
On fruit: The rust causes yellow to orange spots similar to those found on the leaves, but the spots are usually much larger. Fruit infection causes an inferior fruit quality or premature fruit drop.
Symptoms on Juniper
Hi Everyone,
This is my first year experiencing pests and diseases on my junipers, can anyone help identify the issue I am having with my shimpaku juniper? It looks either to be tip blight or another fungal infection? Thanks!!
Awesome, thanks Gregory!Looks like fungal or mite damage, I would treat them with fungicide, rotate 2 or 3 different kids, until it's gone. Mancozeb and Daconil are good places to start, and Copper too. Bayer 3-in-1 may help if it's mites. Make sure to separate the infected from the rest of your trees. Try to avoid watering the foliage (other than the fungicide of course).
I have same on a handful of shimpaku - I am still not sure why 3 out of my 25 got this, but regardless, I treated all of them, and it has not re-occurred.