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We conducted feeding trials in a laboratory setting to test for possible adverse effects of Cry1Ah toxin mixed thoroughly into sugar syrup (60% w/v sucrose solution) at three concentrations (10 μg/mL, 10 ng/mL, and 1 ng/mL) on the survival, pollen consumption, and hypopharyngeal gland mass of Apis mellifera ligustica and Apis cerana cerana. No significant differences in the survival of A. mellifera...
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