Spray affected plants with a ready-to-use systemic insecticide that contains acephate, imidacloprid or dinotefuran. Systemic formulas do not kill bagworms directly. The active ingredient is absorbed into plant leaves and needles, and then circulated throughout the plant. The insects die when they feed on plant parts and plant sap.
Depending on the size of your garage, insulating the walls with batts of R-13 will typically run you about $400, the ceiling $600, and the garage door will cost about $600 if you do it right (See image to the left). You can use the pink Styrofoam stuff from Home Depot, but that will only insulate your door to about R-6.
Re: Cost to insulate and drywall a 21x20 garage? You're going to flip when you get your quotes in. I have a 24X24 with 9 foot walls and I just paid $900 for total insulation and vapour barrier. I called drywallers for quotes on just finishing with me buying and hanging the board and them doing the complete job.e: Cost to insulate and drywall a 21x20 garage? You're going to flip when you get your quotes in. I have a 24X24 with 9 foot walls and I just paid $900 for total insulation and vapour barrier. I called drywallers for quotes on just finishing with me buying and hanging the board and them doing the complete job.