Sue, all the plants got sprayed, sorry for not being clear! Three are showing the problem, two have eaten leaves and these two are in the same spot.
Ken, many thanks for your post. I can see what you're saying. But I didn't thought about it because I'm just staring with DLs.
We never got hard freeze so I don't know if the soil it's too cold.
The ones that went dormant look really good, and so do the new fans that are growing, even the ones of the plants that didn't get dormant.
The small bush you see is a rododendron.
I really don't know much more about the insectide. It appears oily, yes!
