I have noticed abnormal growth on the edges of some of my bay tree leaves where they have started to curl up on one side and turn yellow. This can indicate the presence of the bay sucker insect.
Having grown a bay tree in a pot for over 5 years, with relative success, I noticed in early spring 2023 that black spots had started to appear on some of the leaves. So, I started looking into the the possible causes and remedies for this. I wanted to restore my bay tree back to full health as quickly as possible!