Immature pecans that drop to the ground during August are marked with dark patches and tobaccolike stains. Later in the season some of the ripe nuts have small holes in them. When cut open, the kernels are destroyed and may contain creamy white curved grubs. Reddish brown oe gray, long-beaked beetles 1/2 inch long may be seen in the tree. If the limbs are shaken, these beetles drop to the ground.
Weevils may also be partially controlled by shaking them from lightly infested trees. Place sheets under the tree, then lightly jar the limbs. Collect and kill the dislodged weevils that fall onto the sheet. Repeat every 3 or 4 days until the weevils are no longer present.