Abstract
The apiarian and agricultural sectors got together to set up an apiary survey in Eure-et-Loir, in 2010, during oilseed rape flowering. The aim of this observatory was to highlight what can occur during oilseed rape flowering regarding bee population evolution and agricultural practices. The year 2010 was marked by important larvae and brood mortalities which induced a national investigation. Among the 4 surveyed apiaries, 2 were also concerned by these mortalities but this could not be explained by the observations and the analysis that were carried out. However, this survey enabled us to identify apiarian and agricultural practices around the apiaries and to combine expert testimonies of apiarian and agricultural professionals.
Highlights
Klein et son equipe (2007), via une etude bibliographique, montrent que 87 especes sur 115, soit pres de 75 % des principales especes cultivees, dependent completement ou en partie de la pollinisation animale
The apiarian and agricultural sectors got together to set up an apiary survey in Eure-et-Loir, in 2010, during oilseed rape flowering
The aim of this observatory was to highlight what can occur during oilseed rape flowering regarding bee population evolution and agricultural practices
Summary
Les 4 ruchers suivis appartiennent a 3 apiculteurs volontaires et sont situes sur quatre sites eloignes de quelques dizaines de kilometres (figure 2). Depuis une vingtaine d’annees, les apiculteurs observent une diminution du nombre d’abeilles dans les ruches apres la floraison du colza mais egalement une production de miel relativement faible par rapport a ce qui pourrait e^tre attendu. – developper des methodologies (existantes ou non) d’observation d’abeilles ou de colonies dans le but de fournir des donnees les plus fiables possibles pour decrire les phenomenes de mortalite observes en France. Il s’agissait d’observer dans des conditions habituelles de pratiques apicoles et agricoles le comportement de colonies d’abeilles, homogenes entre elles, pendant la periode de butinage du colza. Ces observations ne constituent pas une experimentation et n’ont donc pas pour vocation premiere d’expliquer les phenomenes de mortalites de colonies observes ces dernieres annees en France mais aussi dans d’autres pays. – un prelevement d’abeilles vivantes par ruche pour analyses de residus et analyses pathologiques ; – une observation de presence ou non d’abeilles mortes « a la porte de la ruche »
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