Weight Loss and Other Damage to Developing Worker Honeybees from Infestation withVarroa Jacobsoni

Honey bee colony mortality and productivity with single and dual infestations of parasitic mite species

“…The mechanism of this synergy remains to be investigated. Both mites deprive the bee of hemolymph and protein (Bailey and Ball, 1991;De Jong et al, 1982;Kovac and Crailsheim, 1988) and both species are also associated with higher levels of bacterial and viral pathogens in bee hemolymph (Allen and Ball, 1996). Genetic variability is known to affect mite impact (Page and Gary, 1990;Frazier et al, 1995) and mortality due to mites often has been discussed in relation to environmental conditions (Eischen, 1987;Eischen et al, 1989;Harbo, 1993).…”

Natural Varroa mite-surviving Apis mellifera honeybee populations

“…This results in an exponential mite population growth (Fries et al 1994) that can lead to colony death typically within a few years if mite population control is not practiced by beekeepers (Boecking and Genersch 2008). While feeding on bee hemolymph, the mite damages the developing worker pupae (De Jong et al 1982;Schneider and Drescher 1987;Kralj et al 2007) and is associated to several lethal honeybee viruses (Bailey and Ball 1991;Ball and Allen 1988). Deformed wing virus (DWV) is the most prevalent honeybee virus worldwide due to Varroa -mediated transmission and replication (de Miranda and Genersch 2010;Sumpter and Martin 2004;Rosenkranz et al 2010).…”

Monitoring for Resistance to Organophosphorus and Pyrethroid Insecticides in Varroa Mite Populations

“…This parasitic mite causes weight loss, malformation of wings, and a shortened life span in honey bees; the mite also serves as a vector of disease-causing agents. Without adequate control of Varroa infestations, bee mortality approaches 100% and colonies can perish within a few weeks (De Jong et al 1982;Ball 1994;Kanga et al 2010).…”