Monterey pine cone killed by the cone beetle Conophthorus radiatae . Normal cone on the right. Internal damage to ponderosa pine cone caused by the cone beetle Conophthorus ponderosae . A seed bug which uses its piercing-sucking mouthparts to remove the internal contents of pine cone seeds but leaves no external evidence of damage on the cone. Example of a white grub , the immature stage of scarab beetles.
White grubs are important pests of roots and are particularly damaging in forest nurseries.
Photograph of a Scarab beetle , the adult of the white grub. Termite workers feeding on wood. These insects are among the most destructive pests of wooden structures. However, in the forests they may be considered beneficial since they assist in the recycling of dead trees. Carpenter ants may cause damage to wooden structures through their nest building activities.