Granary weevil (Sitophilus granarius)
Adults are dark brown and range from 2.0-3.5 mm in length. They are easily distinguishable from the borers and beetles by their long snout, characteristic of the true weevils. Females produce from 200-300 eggs in their 2-3 month lifespan. Adults cannot fly and feign death if disturbed. Eggs are deposited in whole kernels of grain; emerging larvae feed on whole grain. Adults feed in and on whole and broken grain.
Rice weevil (Sitophilus oryzae)
 As for the granary weevil, although distinguished by the four orange-reddish patches on its body.
Indian meal moth (Plodia interpunctella)
Attacks oilseeds and cereals. Adults have a wingspan of 20 mm; the outer portion of the forewing is reddish-brown and the inner portion creamy-white.Eggs are laid on the surface of the grain. Larvae spin webs on the surface of the grain and consume kernels within the webbing.
Lesser grain borer (Rhyzopertha dominica)
This pest is capable of infesting all small grain and develops more rapidly in damaged than in whole grain. Adults are dark brown and range from 2.5-3.0 mm in length. Females produce between 200 and 400 eggs in their 2-3 month lifespan. Eggs are laid on the surface of the grain and larvae burrow into the kernels. Adults can fly, and also feed on the grain.
Rust-red flour beetle (Tribolium castaneum)
Capable of infesting both whole grain and oilseeds, but a more serious problem in stock feed and processed grain (ie flour). Adults are reddish brown and range from 2.3-4.4 mm in length. Females produce from 10-20 eggs per day, and over a lifetime of 200 days – 2 years, produce more than 1000 eggs. Larvae and adults feed on broken grain and flour.
Sawtoothed grain beetle (Oryzaephilus surinamensis)
 Infests a wide range of commodities, but does not readily breed in whole grain. However, most samples of grain contain enough broken fragments for the beetle to become established. Adults are brown and 2.5-3.5 mm long with characteristic tooth-like projections on either side of the thorax. Adults may live for several years and females produce an average of 375 eggs. Larvae and adults feed on broken grain and flour.
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