Showing papers on "Varroa sensitive hygiene published in 1983"
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TL;DR: Alfalfa leafcutting bees, Megachile rotundata (F.), and alkali bees, Nomia melanderi Cockerell, are inherently more tolerant than honey bees, Apis mellifera L., to most insecticides, however, their greater surface-to-volume ratios cause them to be more susceptible to most field-weathered residues.
Abstract: Alfalfa leafcutting bees, Megachile rotundata (F.), and alkali bees, Nomia melanderi Cockerell, are inherently more tolerant than honey bees, Apis mellifera L., to most insecticides. However, their greater surface-to-volume ratios cause them to be more susceptible to most field-weathered residues. Insecticides are minimally hazardous to all bees through nectar contamination, and to the alfalfa leafcutting bee via contamination of pollen-nectar stores and leaf pieces. Both acidifiers and acaricides can increase the hazard of insecticide combinations to all three species of bees. Most herbicides and all fungicides are essentially nontoxic to bees. Wild bees often exhibit different poisoning symptoms than honey bees. This is especially notable with exposure to carbaryl.
81 citations
TL;DR: The longevity of normal and varroa-infested Africanized honey bees, Apis mellifera L., was compared and reduction in longevity appears not to be merely a secondary result of reduced adult weight.
Abstract: The longevity of normal and varroa-infested Africanized honey bees, Apis mellifera L., was compared. The degree of infestation was determined by counting the adult and deutonymphal female mites present in the brood cell when the adult bee emerged. Uninfested control bees lived an average of 27.6 days; infested bees lived only 13.6. Bees infested with two or more mites lived 8.9 days. The number of mites per bee was significantly negatively correlated with both longevity and weight at emergence. There was no significant correlation between weight at emergence and longevity for infested or uninfested bees. Reduction in longevity appears not to be merely a secondary result of reduced adult weight.
74 citations