How do I treat a bag worm infestation on my evergreen shrubs?
April 1st, 2007 by admin
garden hoe asked:
I have an arborvitiae and two well established cedar shrubs that are covered with bag worms and the foliage is starting to turn brown. I live in Iowa. What’s the best treatment? Will my shrubs die?
I have an arborvitiae and two well established cedar shrubs that are covered with bag worms and the foliage is starting to turn brown. I live in Iowa. What’s the best treatment? Will my shrubs die?
- Posted in Shrubs
April 4th, 2007 at 12:15 pm
while in the bag, the only thing you can do is hand pick them and destroy them while still in the bag
April 5th, 2007 at 8:15 am
My son is a professional nurseryman and he says if they are smaller, perhaps an inch or less, spray with Bt, [Bacillus thurgiensis]. Your local nursery should know about this and have it. If they are larger and you don’t perceive a worm in the bag, hand pick them off.
They are in effect strangling the branches and you may eventually have to trim off some dead branches.
April 8th, 2007 at 2:56 pm
I have killed them by poking a hole in the bag and spraying with wasp and hornet spray, kills them deader than a door nail.