INSECTS INJURIOUS TO STORED 

 GRAIN \ - 



It is estimated that stored grain insects cause an 

 annual loss in this country of at least $200,000,000. 

 They are more destructive in the southern United 

 States although injury seems to be growing more 

 common in northern latitudes. Most of the stored 

 grain insects in this country have been introduced 

 from foreign countries. It is said that over fifty 

 species live habitually or occasionally in stored 

 grains and grain products. Not more than a dozen 

 of these are of primary importance. The more im- 

 portant ones are: The Angoumois grain moth 

 (Sifofroga ccrcalclla), the granary weevil (Calan- 

 dra grauaria), the rice weevil (Calaiidra ory::cc), 

 the saw-toothed grain beetle (Silz^amts surinamcn- 

 sis), the Mediterranean flour moth (EpJicsfia kiicJi- 

 nicUa), the Indian meal moth (Plodia inter piinc- 

 tella), the pea weevil (Mylabnts pisontm), and the 

 bean weevil (AcantJwsccIidcs obfccfus). 



Control — One of the best w^ays to keep seed 

 corn, seed peas, wheat, beans, etc., is to store them 

 in barrels or tight boxes; fill the boxes or barrels 

 within 4 or 5 inches of the top and cover; if wee- 

 vils or moths get in them pour carbon bisulphide, at 

 the rate of Yz teacupful to a barrel of grain, into a 

 tin dish and set this on top of the grain and cover 

 the box or barrel with old blankets; leave covered 

 3 or 4 days; the liquid will evaporate and the gas 



1 Chittenden— U. S. Dept. Agr., Far's' Bull. 4=;. 

 ^ Back and Duckett— U. S. Dept. Agr., Par's' Bull. 983. 



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