Maples (Acer spp.) are among the most widely-planted shade and street trees. Although generally well-adapted once established in landscapes, young maples in production nurseries are attacked by a number of native and invasive pests that can limit their survival, growth, and marketability. Potato leafhopper, maple spider mite, calico scale, flat-headed apple tree borer, maple shoot borer, and Japanese beetle inflict serious damage on trees and require intense treatment throughout the growing season. Our recent work has shown that species and cultivars of maples differ markedly in susceptibility to these pests. Seasonal biology and pheromonal components of the maple shoot borer, Proteoteras aesculana, also were studied to support better treatment strategies for that pest.