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Resistance on the rise in storage insects

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Grain storage entomologists are closely monitoring resistance of insects to the fumigant phosphine and are advising growers and grain handlers to review their control practices... The frequency of resistance of grain insects to phosphine fumigant has steadily increased in all species since the mid-1990s... Scientists lead a national resistance monitoring program which provides information on the presence of and trends in resistance to phosphine and assists grain handlers by providing information on managing resistance and control options...