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The restriction of insect infestation to the periphery of bulk wheat



The restriction of insect infestation to the periphery of bulk wheat



Australia Counc Sci Indust Res Jour 18(1): 1-5



(This is a summary, somewhat theoretical, of studies made on temporary wheat depots, some as great as 10,000,000 bu.) Insect infestation in Australian bulk-wheat storages is restricted to a narrow zone at the periphery of the wheat mound. This restriction develops generally during the history of an infestation, and is caused by the heat generated by the insects, the loss of moisture resulting from the rise in wheat temp., and the consequent development of a combination of temps. and moisture contents within the grain mound which is lethal to the insects. The temp. of the interior lethal zone is maintained by insect activity in the peripheral zone, where higher wheat moisture contents permit insect development at temps. which are as high, or higher than, those occurring in the lethal zone.

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