In article . com,
Charlie wrote:

Hello all,

I started a blueberry plant (bluecrop) in a large planter early this
summer, its doing well, lots of new growth, but lately i've been
noticing some of the leaves are wrapped up with a web like substance,
it appears something is living inside some of them... any idea what
this could be? or if it will hurt my plant? The strawberry plant in
the next planter appears fine.

They may or may not be hurting your plant, but they aren't going to hurt
you if you take a little peek. If you find spiders - don't worry.
Caterpillars - maybe worry a little. Spider mites - worry. Bug-eyed
aliens from another dimension - freak out. Look closer and tell us what
you find.