Every year about this time, this sort of damage starts showing up in my garden. I know what’s causing it, but this time I’m going to let my readers weigh in.
Here is a photo of it on my ornamental yellow oregano. I thought I had removed all the oregano from the garden because this was where I first encountered this issue. So I pulled everything up.
Then the issue moved on to my black-eyed susans (rudbeckia sp.) So after dealing with it there for several years, I finally pulled most of the black-eyed susans out!
And look! Here it is on my agastache! I guess it isn’t really finicky about plants now, is it?
And since I don’t really have any more black-eyed susans, it’s decided that it likes echinacea equally well. It’s also on my kolkwitzia–but by now you get the idea.
So you tell me–what do you think? Insect or disease? I will tell you the answer Friday.