The pecan weevil is the most serious late-season pest, as it attacks the nut. Its hosts include pecan and hickory. Adult pecan weevils are beetles with long slender snouts and thin legs. They are reddish-brown to gray and between 0.3 to 0.5 inch long. The snout is longer than the body on the females and slightly shorter on the males.
Eggs are white and are laid inside the developing pecan nuts.
Larvae are creamy white, legless grubs with reddish brown heads. They have four stages and when full grown are 0.35 inch long. Pupae develop underground and are seldom seen. Pecan weevils cause two types of damage. When they emerge from the soil in August, they puncture nuts.