Adults are small, brown, slender beetles, about 3 mm in length with serrated sides on pronotum. Up to 375 eggs are laid by an O. surinamensis female and up to 200 by an O. mercator female. The sawtoothed grain beetle completes its life cycle in about 1½ months. [3] Primary pest; grain feeder Order: Coleoptera Family: Silvanidae Acronym: OSU. (Oryzaephilus surinamensis) and. (Oryzaephilus surinamensis) Description: Brown flattened body 1/10” - 1/8” long; distinctive saw-tooth projections on sides of thorax; flightless; running legs much like cockroaches. The distribution of the beetle is influenced by many factors such It means "rice-loving from Suriname." Major pest of grain and milled grain products, and other stored foods. Common Name: Grain beetle Scientific Name: Oryzaephilus surinamensis Linnaeus Order: Coleoptera Description: The adult beetle is a small (1/10 inch long), very flattened and brown with the segment just behind the head (pronotum) having characteristic “sawtoothed” outer margins, bearing six “teeth” on each side. There can be several generations per year. On a diet of wheatfeed, the life cycle of Oryzaephilus spp. [2] The species's binomial name, meaning "rice-lover from Surinam," was coined by Carl Linnaeus, who received specimens of the beetle from Surinam. These are laid in, or adjacent to, a suitable food supply and at a temperature of 20-23°C hatch in 8-17 days to give flattened larvae about 0.9mm long. The larvae feed within the mass of produce. NEW SEARCH: Saw-tooth grain beetle: Oryzaephilus surinamensis . Sawtoothed grain beetle Oryzaephilus surinamensis (L.) Classification. Oryzaephilus surinamensis (L.) Cereal grains, cereal products, dried fruits, nuts, and some oilseeds: ... Nymphs can mature to adults within 12 weeks, though typically it takes several months for the life cycle to be completed. Description and life cycle of Oryzaephilus surinamensis L. Among all stored product pests, the sawtoothed grain beetle O. surinamensis L. is one of the most widespread species, and their infestation can originate at the manufacturing, storage or retail levels. The larvae moult 2-4 times depending on conditions. varies from about 20 days to more than 80 days at temperatures of 17.5-37.5°C and 10-90% RH. Saw toothed grain beetle, Oryzaephilus surinamensis Dark brown to grey, easily distinguished by the ridges on its thorax. [2] It is a common, worldwide pest of grain and grain products as well as chocolate, drugs, and tobacco. The sawtoothed grain beetle’s scientific name is Oryzaephilus surinamensis (L.). In warm, humid conditions, the entire life cycle, from egg to mature adult, takes about two months. The merchant grain beetle completes its life cycle in a little over a month. Adult saw-tooth grain beetle (Oryzaephilus surinamensis)Courtesy of Degesch Inc. Oryzaephilus surinamensis is one of most common insect pest of grains and a variety of stored products, ... its oil seed content, and the longer life cycle of O. surinamensis depends on the hygroscopic ability of the food source. 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. More Information. Feeding Behavior. Flinn & Friesen (2007) described two culture media for the These beetles are capable of chewing through paper, cardboard boxes, cellophane, plastic, and foil. Resistant to grain protectants in many regions Life cycle Optimum: 20 days at 33°C, 80% relative humidity Description. 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