Consequently, any means of promoting vigorous tree growth should be considered the primary approach for borer management. One is during the period when eggs are laid and hatching, which may occur over a period of several weeks in late summer. http://myswingle.com/ Zimmerman Pine Moths primarily attack Austrian pines, but Scotch and ponderosa have also been affected. It is a shoot tip borer in Eastern white pine. They often can be found underneath masses of freshly produced pitch. Only the latter is available in a retail formulation. The caterpillars are generally dirty white or gray, occasionally with some pink or green. Certain wood borers, such as emerald ash borer, peachtree borer, and Zimmerman pine moth, are capable of damaging healthy trees. ZPM can kill your tree, but more often than not it … Preventive insecticide sprays are effective when applied during periods when the caterpillars are exposed on the surface of the tree. Imidacloprid soil drenches may work well against flatheaded borer larvae (aka metallic Feedback, questions or accessibility issues: © 2020 The Board of Regents of the University of Wisconsin System. Coneworm (Dioryctria spp. Our physical location is 1311 College Ave, Fort Collins, CO. Having website issues? Pine Bark Beetles and other such borer beetles are responsible for killing more pine trees than any other insect. Zimmerman pine moths (Figure 5) are common pests of Austrian and Scotch pines and Norway spruce that can kill tree limbs and tree tops.