Pacific Wax Myrtle fungus? #734269 - Ask Extension

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Pacific Wax Myrtle fungus? #734269

Asked November 21, 2020, 10:44 AM EST

Hi, I planted a Pacific Wax Myrtle (Myrica californica) this fall, and I’m noticing some brownish-reddish spots and rust coloration appearing on the leaves. Mostly on new growth. Reading up on this species, I’m guessing it might be a type of fungus (anthracnose? leaf blight?). Ive read terrible things about phytophthora on wax myrtles in Oregon. I’m hoping I can catch/treat whatever this is early! I am in N Portland, St John’s. The shrub is in a south-facing part sun location. I have more photos available.

Multnomah County Oregon

Expert Response

Thank you for your question. The only disease this species is known to contract in the Pacific Northwest is leaf blight (which this not appear to be): https://pnwhandbooks.org/plantdisease/host-disease/california-wax-myrtle-morella-californica-leaf-blight Since our local Extension offices are closed to the public, and we have no staff to examine the leaves, I suggest you send a sample to the OSU Plant Clinic for identification: https://bpp.oregonstate.edu/plant-clinic I hope this is helpful. Good luck!
Kristena LaMar Replied November 21, 2020, 11:28 AM EST
Thank you for the quick response!! I will mail out a sample to them on Monday!
The Question Asker Replied November 21, 2020, 11:36 AM EST
Great! I hope it is nothing serious!
Kristena LaMar Replied November 21, 2020, 11:39 AM EST

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