Nut weevil larvae are legless grubs with a curved body that is fattest in the middle and tapering toward both ends. Larvae are creamy white colored with a brown head and can grow to be 1/4 to 3/8 inches long. Adult females lay their eggs inside …

Weevil infestations can be reduced by picking up chestnuts daily and after curing, heat them to 140˚F for 30 minutes to kill the larvae in the nuts. A cold treatment of holding the nuts at 0˚F for four days may also be effective, but it may also affect the nuts' flavor.

Curculio nucum, the nut weevil, is a medium-sized beetle, with an especially elongated snout, characteristic of the Curculionini tribe of the weevil family (Curculionidae). Its larvae develop in hazel nuts Corylus avellana, being a serious pest in hazelnut orchards.

During their larval stage, Nut Weevil larvae consume the nutmeats of various trees such as acorns, hickory, and other nuts. As adults, they feed on leaves, buds, and flowers, while the larvae continue to nourish themselves with developing nuts.

Sep 24, 2007 · Nut weevils attack the developing nuts on the tree during mid summer. The female adult weevil lays her eggs inside the immature nuts. The egg hatches into a creamy white, grub-like larva that feeds inside the nut until fall.

May 27, 2024 · Nut weevil infestations can severely impact nut harvests, with some regions reporting larvae in nearly 90% of all harvested fruit. Nut growers have turned to various pest-control tactics to combat nut weevils, including thermal treatments, radio waves, and killer fungi.

Nut weevil larvae eat the nutmeats of acorns, hickory, or other nuts, then bore out of the nut, drop to the ground, and live in the soil before pupating and emerging in spring as an adult. Similar species: Several types of weevils (and even members of other beetle families) are commonly called curculios, even though they are not in this genus.

May 5, 2024 · Larvae feed inside the acorn/nut and emerge to pupate in the soil. The female drills a hole through the nut's shell and excavates one or more chambers near the inner surface, then deposits one egg per chamber. The larvae feed on the nut meat then cut exit holes before entering the soil.

Nut weevils can be very serious pests of native and non-native nut trees. These damaging insects begin to attack the kernels in the developing nuts while the nuts are still on the tree. However, problems often are not noticed until the nuts are harvested and opened.