You may have noticed the fairly sudden decline of ornamental cherry trees in our area over the last few years. This is due, in large part, to a quiet unseen moth and its larvae, the Cherry Bark Tortrix (aka CBT).
These moths begin laying their eggs in the cracks and crevices in the bark of susceptible trees in April through September. The Larvae mine around in there, doing considerable damage all the way to the cambium layer, causing a disruption to water and nutrient flow to the canopy of the tree. This can result in the complete dieback of entire branches and eventually the whole tree will succumb.