Maple tree disease

Asked July 17, 2019, 9:53 PM EDT

We purchased this maple tree 1 year ago from Independence Oregon nursery. We live in Sublimity. Tree looked healthy and growing until about 3 days ago when we noticed the leaves changing to a lighter green and yellow color and spots on the underside. We did not see any evidence of insect infestation. Two other maple trees purchased and planted at the same time seem to be normal. All 3 trees were planted by a nursery employee. Help?? We can supply more pictures if necessary. Kerst and Linda Bosma

Marion County Oregon trees and shrubs maple trees

4 Responses

Hello: It would be helpful to see photos of the whole plant, or at least whole shoots.Is this a different cultivar than the other two maples? If this occurred in the last 3 days I would lean towards it being a cultural or environmental problem as opposed to some sort of disease. The leaves turning lighter green implies a possible nitrogen deficiency and the spots may just be a stress reaction. If you can forward photos to my email address below that would help greatly. Thanks!

These were purchased April 28, 2018 and planted shortly after. We believe all 3 trees were the acer sienna glen variety of maple. Attached are 3 more photos taken this morning. Hope it helps. Trees are well watered and spring and fall fertilized with Jobe tree spikes. Thanks for any help.

These were purchased April 28, 2018 and planted shortly after. We believe all 3 trees were the acer sienna glen variety of maple. Attached are 3 more photos taken this morning. Hope it helps. Trees are well watered and spring and fall fertilized with Jobe tree spikes. Thanks for any help.

The chlorotic and curled leaves seem to be those on the exterior of the canopy, most exposed to the sun. It kind of looks like it might be sunburn.