yellow blueberry leaves with necrotic freckles
Best regards and thanks for your response and help
I have never seen anything like that in Michigan Blueberries. It is not a soil pH problem which would cause the newer leaves to be yellow with green veins. Tip burn looks like drought but that would be the newer leaves as well. What did you spray on them. How often are they watered and where does the water come from?
If the yellow leaves are only on the bottom of the plant I would agree the the herbicide spray might be to blame. Usually the grass herbicides are really safe but the oil carrier can cause problems on hot days. Some of it does look like spray injury