The sawtoothed grain beetle is a notorious pantry pest, feeding on damaged and processed grains like cereal, oatmeal, rice, crackers, biscuits, flour and pasta. The merchant grain beetle is very similar to the sawtoothed grain beetle in appearance, life cycle, and habits. Under ideal conditions, this insect can complete its life cycle (egg to egg) in 27 to 52 days. The sawtoothed grain beetle’s scientific name is Oryzaephilus surinamensis (L.). To avoid misapplication, call your local pest control professional. Sawtooth Grain Beetle Life Cycle The sawtooth grain beetle likes to lay eggs in small batches or singly in food packages where it completes its entire life cycle. The prothorax bears a series of lateral teeth-like protuberances (hence the common name) and 2 longitudinal dorsal furrows. In warm, humid conditions, the entire life cycle, from egg to mature adult, takes about two months. The sawtoothed grain beetle cannot fly, but the merchant grain beetle can fly. life-cycle: The female Saw-toothed grain beetle lays up to 400 eggs, either singly or in small batches, at a rate of 6-10 per day. Elytra with longitudinal striae and with punctuations. A female can produce 43-285 eggs in their six to ten month average lifespan which are deposited on a food mass. Aside from tainting stored goods, sawtoothed grain beetles do not cause many issues for homeowners. The pests cannot bite or sting and do not infest fabrics. Adults live longer than most beetles. The female saw-toothed grain beetle lays eggs singly or in small batches in the food product. These insects are very good at crawling on any surface including glass, and steel. A+ BBB Rating. Life Cycle Female Red Flour beetles will deposit 200-500 eggs in food during a 1-2 year life span. Larvae emerge from the eggs in 3 to 10 days, and usually mature into adults within 50 days. Start over again from the insect identification keys page. The habits and development of the two species are similar. The sawtoothed grain beetle is a major pest of stored food products in homes and commercial facilities. Transcript - Sawtoothed grain beetle Transcript: Sawtoothed grain beetle. Geographical distribution: World-wide. Description and development The Merchant Grain Beetle (Oryzaephilus Mercator) and Sawthoothed Grain Beetle (Oryzaephilus surinamensis) are small rusty brown beetles. Adult sawtooth grain beetles can live 6 to 10 months or up to 3 years and 3 months. The sawtoothed grain beetle has smaller eyes than the merchant grain beetle and a larger area just behind the eyes. Practice proper food storage habits - Store new food products in tightly sealed glass or plastic containers. The ideal temperature range for larvae development within eggs is about 27-29°C (80-85°F ), under such conditions they hatch in three to five days. It is common in cereal products and macaroni. If they find a place to stay warm, sawtoothed grain beetles will continue reproducing all year. The sawtoothed grain beetle’s scientific name is Oryzaephilus surinamensis (L.). Damage is generalized and not necessarily identifiable as coming from this particular species. The ovipositing female may survive for 6-10 months… What is the Sawtoothed Grain Beetle life cycle? For related topics please refer to the breadcrumbs, main menu, footer, or search bar. Larvae are small yellowish worms that usually do not leave the food product. Store pet food in containers with a lid. The female sawtooth grain beetle emerges in … Video length: 13 seconds. Sawtoothed Grain Beetle, Oryzaephilus surinamensis. It is about 2.5 mm long and is brown. Tainted items on grocery store shelves can lead to a mass infestation in the local area. Larvae - Develop rapidly, particularly at high moisture contents (greater than 14 percent). The merchant grain beetle has a similar but shorter life cycle. Throw away infested food - Empty cabinets and pantries and check every package. They are unable to feed on undamaged grains. Beetles are capable of rapid population buildup in large bulks of grain in heated buildings. It can be found in other moist locations such as the walls of houses around plumbing systems. Acronym: OSU. Life Cycle Female grain beetles will deposit 50-300 eggs in food during a 6 month -3 year life span. All species of grain beetles lay eggs individually or in batches deposited in or around a ready food supply. The life cycle of the sawtoothed grain beetle begins when the female lays her fertilized eggs in the cracks of grains or on top of items like cereal or flour. The habits and development of the two species are similar. Life history Pupation occurs either freely or within a cocoon consisting of particles of grain. 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