Beetles represent the insect order with the most species - they are found nearly everywhere on the planet. The outward appearance of beetles is generally familiar, characterized in general by a hard and solid body surface. Ancient cultures revered some beetles as holy, and even today some species are thought to bring good luck.
Although many beetle species are beneficial, others are plant pests and still others stored product and material pests.
Beetles develop in several stages. The larvae emerge from the eggs, then pupate after a number of moultings. Following pupation, the adult beetle then emerges from the pupa. Most beetle species can fly.
The beetle relevant in this context can be classified as either stored product pests or material pests. The stored product (or storage) pests include the species that infest food, non-edible foodstuffs or feeds. They not only cause feeding damage, but also represent serious problems for hygienic reasons due to contamination of foods. Material pests often infest valuable products such as furs, carpets, woollens, books, etc. A number of species are also dangerous wood pests.
Both the larva and adult forms of many beetle species can cause considerable damage.
Beetles that damage stored products:
Grain weevil (Sitophilus granarius)
Lesser rice weevil (Sitophilus oryzae)
Saw-toothed grain beetle (Oryzaephilus surinamensis)
Rusty grain beetle (Cryptolestes ferrugineus)
Lesser grain borer (Rhizopertha dominica)
Rust-red flour beetle (Tribolium castaneum)
Mealworm beetle (Tenebrio molitor)
Copra beetle (Necrobia rufipes)
Khapra beetle (Trogoderma granarium)
Cigarette beetle (Lasioderma serricorne)
Drugstore beetle (Stegobium paniceum)
White-marked spider beetle (Ptinus fur)
Common bean weevil (Acanthoscelides obtectus)
Beetles that damage materials:
Larder beetle (Dermestes lardarius)
Two-spotted carpet beetle (Attagenus pellio)
Varied carpet beetle (Anthrenus verbasci)
Shiny spider beetle (Gibbium psylloides)
Golden spider beetle (Niptus hololeucus)
Furniture beetle (Anobium punctatum)
House longhorn (Hylotrupes bajulus)
Brown powder-post beetle (Lyctus brunneus)