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Imidacloprid Residues Found in 69% of Bees

A Survey of Pesticide Residues in Pollen Loads Collected by Honey Bees in France

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Location: 
Sophia-Antipolis
France
43° 37' 21.2052" N, 7° 2' 28.122" E

Location

Sophia-Antipolis
France
43° 37' 21.2052" N, 7° 2' 28.122" E

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

Understanding the Science: the Impact of Imidacloprid on Bees

Imidacloprid is the largest-selling pesticide on earth. It has been widely implicated as an important cause in honeybee death worldwide, and the Colony Collapse Disorder (CCD) problem. The following describes some of the important toxic characteristics of imidacloprid.

See Also:

Italy keeps ban on neonicotinoid seed coating to save bees

YourIs.com, Italy keeps ban on neonicotinoid seed coating to save bees

The Italian Agriculture Ministry suspended the use of pesticides containing clothianidin, thiametoxam and imidacloprid for the coating of any plant seeds (May '09).

Tens of thousands of them don’t even manage to get back to their apiary. Disoriented, they lose the way home and die. Others just drop dead after sucking the tiniest amount of dew exuded by maize leaves if the plants have been absorbing neonicotinoids, a class of pesticides that Italy has temporarily banned as seed coating in September last year for their “possible connection to the colony collapse of bees”.

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