Interactions of forest management practices and tip moth damageThis article is part of a larger document. View the larger document here.
Intensive forest management practices have been shown to increase tree growth and shorten rotation time. However, they may also increase the need for insect pest management because of higher infestation levels and lower action thresholds. The Nantucket pine tip moth (Rhyacionia frustrana [Comstock]) is one insect that is expected to become more important with more intensive forest management practices. Two studies were developed to investigate these relationships. Treatments included various combinations of herbicide applications, irrigation, fertilization, and insecticide applications. These studies demonstrated that tip moth management improves tree growth. Tip moth damage increased due to weed control, but not due to N fertilization. Nitrogen fertilization did increase the number of tip moth pupae per shoot, however. In conclusion tip moth populations can increase due to intensive management practices, and insect control should be considered a part of efforts to maximize tree growth.