Q.bagworms
I am having trouble with bagworms destroying my leyland cypress trees. What can I do or use to get rid of them? I have lost one tree last year to them.

I am having trouble with bagworms destroying my leyland cypress trees. What can I do or use to get rid of them? I have lost one tree last year to them.
Recommended insecticides include carbaryl (Sevin, Carbaryl), Bacillus thuringiensis (Dipel, Javelin), malathion (Malathion), acephate (Orthene), trichlorfon (Dylox), bifenthrin (Talstar), cyfl uthrin (Tempo, Decathlon, Bayer Lawn and Garden Multi-Insect Killer), spinosad (Conserve SC, SpinTor), and lambda-cyhalothrin (Scimitar).