Any of you armchair abadiginals( arborists) have a surefire solution for taking out catepillars on pine trees. I have what I think are douglas fir(3-4ft) and a quick search indicated they may be sawflies? At any rate they are hammering the needles on my little trees and im in duke nukem mode and need to take these little assholes out without being to harsh to the trees. Trees were in tough shape when we moved in and I nursed them back to what consider breakout mode growthwise and these little assholes show up.