Will the budworm attack my landscape trees?

Unless landscape trees are under or next to older/taller spruce or fir trees, they are unlikely to sustain damage. Young trees that are in close proximity to spruce and fir may suffer from some defoliation, but are seldom killed. Spraying is effective protection if concerned. Trees older than 50-60 years are more vulnerable to defoliation damage. If budworm is detected, spraying is recommended for foliage protection.