Q.I Just Got A Yellow Bell From Home Depot And At The Store, I Noticed Some Web Worms On It And Asked What I Should Do And He Mentio
ned something but only thing I got was “oil” I had one of these plants where I used to live and it never had any pests on it, I had it for over 5 years and had to trim it profusely, but other than water and a bit of fertilized for blooming plants, it thrived!
Certified GKH Gardening Expert
There are a few oils that work, but I would recommend a nifty little bacteria called Bacillus thuringiensis (Bt). It is harmless to you, but will make quick work of the caterpillars.
Here are some articles that will help: