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Curculio glandium eggs are deposited in acorns by the adult weevil chewing channels into the fruit. The eggs are then released using an ovipositor, a long, narrow organ featured in female weevils. [2] These do not reach the acorn's embryo and are healed by the plant, sealing the holes and protecting the eggs from parasites.
The adults lack functional wings and do not fly. There are no males, and reproduction is asexual. Eggs are laid at random in the soil in summer around food plants, and, on hatching, the larvae feed on the roots until late fall, when they hibernate. Strawberry root weevils reproduce through a process called parthenogenesis. This means that ...
New adults ready to reproduce are attracted to freshly cut stumps of conifers. Eggs are deposited singly (one or two per day) under the ground into stumps, thick roots or in the soil in their vicinity. Large pine weevils can locate spots on the ground to dig into in a great precision using olfactory cues.
The wheat weevil (Sitophilus granarius), also known as the grain weevil or granary weevil, is an insect that feeds on cereal grains, and is a common pest in many places. It can cause significant damage to harvested stored grains and may drastically decrease crop yields. The females lay many eggs and the larvae eat the inside of the grain kernels.
Weevils also are known to infest oats, rice, corn, corn meal, sorghum, and cereal, so you might want to apply the same practice you do to your flour as those items as well.
Female weevils have the ability to reproduce parthenogenetically [2] with fertilisation of eggs required to produce males, though no males have been observed. [3] This form of parthenogenesis is known as thelytoky. Grubs grow up to 1 cm in length, have a slightly curved, legless body and are creamy white in colour with a tan-brown head.
In addition, deodar weevils can vector pitch canker (Fusarium moniliforme) The weevils are active all winter long and lay one to four or five eggs in the inner bark in holes chewed through the bark, but fall is the peak time for adult feeding and breeding. The weevils do some minor damage as they feed on the bark before laying their eggs.
The eggs are laid into the cupules or around the peduncle joints. Eggs hatch in five to seven days producing large, legless grubs. When the larva emerges from the egg it feeds on the developing chestnut. The larvae leave behind frass and excrement. Infested nuts may contain several weevil larvae or weevil burrows filled with excreta.