A survival field test was initiated in 1999 to observe the effects of no treatment against Varroa destructor on European honey bee colony survival. After losses of over two-thirds of the 268 original colonies, new colonies were made from the survivors. In 2002, genetic material from these survivors was bred into an independent group of 60 colonies. In 2013, 519 non-treated colonies from both groups were being used for commercial beekeeping, and mite populations were very low. This indicates that under commercial beekeeping conditions, simple methods can be used to select for reduced mite populations.Selecció n para la resistencia a Varroa destructor bajo condiciones comerciales de apicultura.En 1999 se inició una prueba de supervivencia en campo para observar los efectos de la ausencia de tratamiento contra Varroa destructor en la supervivencia de colonias de abejas europeas. Tras la pérdida de más de dos tercios de las 268 colonias originales, se hicieron nuevas colonias a partir de las supervivientes. En 2002 el material genético de estas supervivientes fue utilizado para crear en un nuevo grupo independiente de 60 colonias. En 2013, 519 colonias no tratadas de ambos grupos estaban siendo utilizadas para la apicultura comercial, y las poblaciones de ácaros eran muy bajas. Esto indica que en condiciones comerciales de apicultura se pueden utilizar métodos simples para la selecció n de poblaciones reducidas del ácaro.

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

No abstract

Hemolymph samples from adult bees that had completed their pupal development and emergence in a 7 Tesla field contained a lower percentage of glucose than controls, indicating that trehalase enzyme activity in honey bees is reduced in strong magnetic fields. Significantly more phospholipids were found in the intestines of magnetic field‐exposed bees than in controls. No significant differences were found for fatty acids, triacylglycerols, or steroids. Bioelectromagnetics 20:117–122, 1999. © 1999 Wiley‐Liss, Inc.