How-To Features Tree Registry Register your trees for customized advice. Fall Care Kits Prepare your trees and shrubs for winter with this kit containing specially formulated fall fertilizer and the TreeHelp Bug Band insect trap. The adult pecan weevil typically emerges from the soil as early as July 25, frequently two to three days after a heavy rain.
Adults cause two types of nut damage, depending on the stage of nut development during attack.
You sometimes can recognize nuts damaged in this way by a tiny, dark puncture that extends through the shuck and unhardened shell and a tobacco-like stain around the feeding wound. The presence of a larva in the nut, prior to shell hardening, indicates damage by another insect, usually nut casebearer or hickory shuckworm . Pecan weevil grubs are not found in nuts with unhardened shells. The second type of nut damage is caused by weevil grubs feeding in partially matured nuts. Damaged mature nuts neither bleed nor drop.