In Switzerland (April month) was mass poisoning of bees due to which they originally blame farmers, but it turned out that farmers are not to blame. In the region Zäziwil and Möschberg 172 bee colonies was poisoned.
They analyzed poisoned bees and found that the reason for that was insecticide Fipronil, which is banned in Switzerland. Poisoning occurred during the flowering of fruit trees, so the relevant departments of government continue to seek and identify the active substance in the flowering trees.
Fruit growers had proper documentation from which it was evident that they sprayed fruit trees with a fungicide Folpet, which is allowed in Switzerland. But that didn`t stop investigators, they discovered that approved insecticide Folpet was imported from Israel, where the factory before filling fungicide (Folpet) filled Fipronil for the United States. It turns out that the equipment was not cleaned before they started to use Folpet. Therefore, the Swiss withdrew from the market all the fungicide those batches.
Hans Peter Baumann, Chief of Staff of the Office of Agriculture and Nature of the canton of Bern said:
It’s relatively important that we can determine the source of such a poisoning.
Example of good practice
This is a great example of good practice, how all investigations should be conducted. We hear too many times stories about the mass poisoning of the bees without an outcome.
Source: http://www.bluewin.ch/de/news/regional/region-bern/2014/11/10/ursache-des-bienensterbens-im-emmental-gefunden.html, http://www.czs.si/novice_podrobno.php?sif_no=4313 and http://www.srf.ch/news/regional/bern-freiburg-wallis/bienensterben-bei-zaeziwil-aufwaendige-spurensuche-loest-das-raetsel.