Pears

Imidacloprid contaminates the pollen of seed-coated crops : A high risk for bees

Conclusions for Imidacloprid (Gaucho) :

  • A long persistence / soils (t1⁄2 = 9 months)
  • An uptake in flowers (mean level at 7 ng/g)
  • Mean level at 2-3 ng/g in pollen
  • Subletal effects at 2-4 ng/g (4 days)
  • Chronic mortality from 0.1 ng/g (10 days)
  • Main metabolites as much toxic as imidacloprid for bees
  • High risk for the beehives (PEC/PNEC >> 1)
  • Synergies with other pesticides, pathogens and parasites
  • Generalization of these results to nicotinoids and pyrazoles (clothianidin, thiamethoxam, fipronil...)
Location: 
Montpelier
France
44° 15' 36.2124" N, 72° 34' 31.3932" W

Location

Montpelier
France
44° 15' 36.2124" N, 72° 34' 31.3932" W

Behaviour of Imidacloprid in Fields. Toxicity for Honey Bees

By  J. M. Bonmatin · I. Moineau · R. Charvet · M. E. Colin · C. Fleche · E. R. Bengsch

Complete Article online

Location: 
Orleans
France
47° 54' 4.9932" N, 1° 54' 14.3136" E

Location

Orleans
France
47° 54' 4.9932" N, 1° 54' 14.3136" E
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