Saw toothed grain beetle, Oryzaephilus surinamensis Dark brown to grey, easily distinguished by the ridges on its thorax. The merchant grain beetle completes its life cycle in a little over a month. Primary pest; grain feeder Order: Coleoptera Family: Silvanidae Acronym: OSU. More Information. [2] It is a common, worldwide pest of grain and grain products as well as chocolate, drugs, and tobacco. 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. Major pest of grain and milled grain products, and other stored foods. The sawtoothed grain beetle completes its life cycle in about 1½ months. Feeding Behavior. varies from about 20 days to more than 80 days at temperatures of 17.5-37.5°C and 10-90% RH. (Oryzaephilus surinamensis) and. It means "rice-loving from Suriname." Sawtoothed grain beetle Oryzaephilus surinamensis (L.) Classification. Up to 375 eggs are laid by an O. surinamensis female and up to 200 by an O. mercator female. Flinn & Friesen (2007) described two culture media for the 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. The larvae moult 2-4 times depending on conditions. Life Cycle… The sawtoothed grain beetle’s scientific name is Oryzaephilus surinamensis (L.). 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. In warm, humid conditions, the entire life cycle, from egg to mature adult, takes about two months. Adults are small, brown, slender beetles, about 3 mm in length with serrated sides on pronotum. There can be several generations per year. (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. Description The saw-tooth grain beetle (Oryzaephilus surinamensis) is dark brown in colour and about 2.5-3.5 mm in length.They are slender and flattened in appearance making them well adapted for crawling into cracks and crevices. 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. [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 beetles are capable of chewing through paper, cardboard boxes, cellophane, plastic, and foil. NEW SEARCH: Saw-tooth grain beetle: Oryzaephilus surinamensis . [3] 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. Resistant to grain protectants in many regions Life cycle Optimum: 20 days at 33°C, 80% relative humidity Oryzaephilus surinamensis, the sawtoothed grain beetle, [1] is a beetle in the superfamily Cucujoidea. The larvae feed within the mass of produce. On a diet of wheatfeed, the life cycle of Oryzaephilus spp. Adult saw-tooth grain beetle (Oryzaephilus surinamensis)Courtesy of Degesch Inc. Description. 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