Why are my photinia’s leaves having partial discoloration?

Question

Certified GKH Gardening Expert: I believe this to be a fungus that is common to the Photinia.
Here is a link that will help you:

https://www.gardeningknowhow.com/ornamental/shrubs/photinia/growing-red-tip-photinia.htm
https://www.gardeningknowhow.com/ornamental/shrubs/photinia/photinia-leaf-spot.htm.

I would agree with that but if you notice it isn’t leaf spots, this is what makes me leary about it being a fungus. Any other ideas?

Answer 1

I'm still fairly certain your dealing with a fungus.
Here are a few more links.

http://www.collierarbor.com/probPhotiniaLeafSpot.php

http://herbicidesymptoms.ipm.ucanr.edu/?selectedCrop=172

https://ag.tennessee.edu/EPP/Redbook/3%20Disease%20Control%20for%20Trees,%20Shrubs%20and%20Flowers%20Feb%202014.pdf