ETUDE DU THERMOPRÉFÉRENDUM DE VARROA JACOBSONI OUD

Behavioral defenses of honey bees against Varroa jacobsoni Oud . Otto

Two behaviors of honey bees, hygienic behavior and grooming, are mechanisms of defense against brood diseases and parasitic mites. Studies have shown that Apis mellifera colonies remove worker brood infested with Varroa jacobsoni mites from the nest (hygienic behavior), and groom the mites off other adult bees, but to a limited extent compared to the original host of V. jacobsoni, A. cerana. Re...

The transmission of deformed wing virus between honeybees (Apis mellifera L.) by the ectoparasitic mite varroa jacobsoni Oud

Under field conditions, Varroa jacobsoni were shown to be highly effective vectors of deformed wing virus (DWV) between bees. Adult female mites obtained from honeybee pupae naturally infected with DWV contained virus titers many times in excess of those found in their hosts and, beyond that, which might be expected from a concentration effect. It is therefore possible that DWV may be capable o...

Etude de certains facteurs permettant d'intensifier et de regulariser la fonction toxigene du bacille diphterique

Etude de souches américaines, asiatiques et européennes de microbes du groupe pullorum gallinarum

Etude du cuivre et de l'hémocupreine sanguin dans la maladie de Chalcopenie des ovidés en Iran