V. The resistance of insects to insecticides

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Abstract
Resistance, particularly of flies, seems to be inherited but the genetic factors involved are as yet unrecognized. Culicine mosquitos show some development of resistant strains while anophelines do not. Bed bugs and lice have shown some tendency to develop partially resistant strains. In view of such tendencies of certain insects, possibly control of insect breeding places is a better answer to freedom from disease than is the wide-spread use of insecticides and the occasional development of resistant strains of such disease vectors.
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