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Comparison of honey bee apis mellifera hymenoptera apidae losses from 2 formulations of methyl parathion applied to sunflowers helianthus annuus/


, : Comparison of honey bee apis mellifera hymenoptera apidae losses from 2 formulations of methyl parathion applied to sunflowers helianthus annuus/. Journal of Economic Entomology 77(1): 230-233

When blooming H. annuus L. were treated with microencapsulated methyl parathion, nearby colonies showed a mean loss of 460 honeybees, A. mellifera L. Colonies located near a sunflower field treated with an emulsifiable concentrate [EC] of methyl parathion had a mean loss of 1990 bees during this same period. Bees recovered from dead bee traps the day after treatment had methyl parathion residues of 0.27-1.28 ppm from microencapsulated and EC formulations, respectively. There was no difference between the methyl parathion residues in trapped pollen from each group and no evidence of brood damage of colonies exposed to either formulation of methyl parathion.

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