Ceanothus help please

I brought this ceanothus last year - not sure of the variety. Recently the leaves have begun to turn yellow and drop. On closer inspection lots of the new growth seems to have been eaten and there are signs of webs of some sort. When I opened a clump of leaves covered in the web, there was some sort of worm/larvae inside. I’m very much a gardening beginner so any advice on how to address or treat this would be much appreciated? Is it possible to save this plant? Thank you

 

Hello Victoria, welcome to GC. What you describe sounds like Tortrix moth caterpillars. The good news is that there is a treatment available which will get rid of them without harming anything else. It's a bacteria (Bacillus thuringiensis) specific to caterpillars, sold as a powder that you mix thoroughly with water and spray on the affected plants. I can't tell you the UK brand names, but have a look at the tiny print on the packaging for Box Moth or Pine Processionary caterpillar treatments. Or perhaps someone who has used it could furnish the brand name?
You need to thoroughly soak the foliage, and maybe use it as a preventative measure next spring.

 

@noisette47 thank you so much. Does this look like the stuff?

 

Yes, that's the one. Must be one of the very few occasions when a gardening-related product is cheaper here than there Or it would be if it wasn't for the new customs rules!