Ambrosia beetles lack the spine . Clear-winged moths typically have one to two generations per year. Virtually all woody plants and trees are subject to borer attacks. Borers nearly always attack unhealthy or stressed plants or trees. The preferred and most effective management practice is to keep plants and trees healthy.
Prevention is the best cure.
Seasonal Abundance Borers may attack woody plants anytime during the year, but predominately during the spring, summer and fall months. Damage Buprestid larvae tunnel under the bark and some species excavate winding tunnels through the sapwood. These tunnel are often filled with frass, and oval in cross section, more than 3 mm wide and usually enter the wood at an angle. Foliage discoloration occurs and there is usually noticeable sap-staining of bark around holes. Cerambycidae larvae tunnels, are circular in cross section, more than 3 mm wide, go straight into the wood for a short distance before turning and are free of frass.