We have lived at our current location for over 40 years, and thru the years have planted thousands of pine trees on our 10 acres. Varieties include: white pine, scotch pine, black pines, varied spruces and concolor fir trees. The vast majority of our pine trees are infested with caterpillars - which are devouring the needles. Question: will the worms die out before killing our trees? Will the trees recover? We are just sick about losing our pines.