White on laurel branches
Hi - It sounds like you might be dealing with white prunicola scale on your laurel. Take a look at this article for information and photos. https://marylandgrows.umd.edu/2019/09/25/qa-what-is-this-white-growth-on-my-cherry-laurel-shrub/
If this does not look like what you have, we would need to see photos so we can determine what is going on. You can attach up to three photos at a time.