GRANARY WEEVIL

GRANARY WEEVIL
The Granary Weevil is a very small beetle, about 1/16th of an inch for the body length. The head is elongated into a snout. Granary Weevil larvae are small pale grubs without any legs. It is a brownish black color. Granary Weevils infest food products, especially dry organic materials found in the pantry. They commonly get into breakfast cereals. While they do not consume large amounts of the food material, their presence is enough to eliminate usage of the contaminated product. They are a serious pest in quantity storage areas, often destroying whole grain elevators worth of product.

Granary weevil anatomy

1.Antenna
2.Eyes
3.Head- has snout
4.Legs- 6
5.Wings- wings under elytra
6.Thorax- elongated oval pits
7.Petiole- none
8.Abdomen
9.Color- polished red to black
10.Other- larvae very destructive

Life Cycle
The female will lay eggs directly into the grain kernel, where they hatch in a few days. Over 200 eggs may be laid at a time. The larvae hatch and feed on the interior of the grain, going through four instars until the grain is completely hollowed out, which takes 3-5 weeks. The pupae remain in the kernel for 1-2 weeks longer. The complete life cycle can be completed in 1-5 months, with about four generations each year. The adult will live 7-8 months.