Wait until the worms emerge in spring, and spray with pyrethrin.
That and diligent bag removal should be all you need.

Chris Owens

Tono wrote:

I just realized these have covered one arborvitae. They have already
attached their silk lined sleeping bags to the branches and most have
closed the hatch, getting ready to lay eggs I guess.

Yes, I searched google and found a million posts, but didn't find what
to do if you have just discovered them this time of year. I have picked
off one or two hundred bags. Dropped them in a bucket of water with a
lot of bleach. Not a friendly death, but what can one do?

My concern is what about all the ones I missed? I read up to 2000 eggs
per sack! I don't like to use poison, but will use it if I have to. It
seems like it will do the best if I wait for spring/summer for them to
hatch, then spray. I don't know if using any spray now will get to them
inside their sack?

All help appreciated,
Tono
SouthEastern PA zone 6


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