I think I may have sprayed too early. I did my second application of BT on Saturday. Today, while cutting my grass I noticed some puss-like sacs on the lower branches of my Leyland Cypress. When I look reaaaaaaal close at them and move around the clear liquid a bit, they appear to be tiny caterpillars. What's the deal? Is this what a bagworm looks like before they start to get active and feed? Anyone know how long BT will last on a tree? What about rain after an application? Any help would be great.