We here reconsider the status of subgenus Hemichaeta Steyskal, concluding that there is no justification to keep it in the genus Poecilotylus Hennig. Hemichaeta is thus removed from Poecilotylus and elevated to generic status with Hemichaeta scutellata (Cresson) as the type and only included species. Hemichaeta scutellata is fully redescribed, including the previously undescribed male and femal...

The arrival to the United States of the Africanized honey bee, a hybrid between European subspecies and the African subspecies Apis mellifera scutellata, is a remarkable model for the study of biological invasions. This immigration has created an opportunity to study the dynamics of secondary contact of honey bee subspecies from African and European lineages in a feral population in South Texas...

Varroa destructor is an ectoparasitic pest of honeybees, and a threat to the survival of the apiculture industry. Several studies have shown that unlike European honeybees, African honeybee populations appear to be minimally affected when attacked by this mite. However, little is known about the underlying drivers contributing to survival of African honeybee populations against the mite. We hyp...

In 1990 the Africanized honey bee, a descendent of Apis mellifera scutellata, was identified in south Texas [Hunter, L.A., Jackman, J.A., Sugden, E.A., 1992. Detection records of Africanized honey bees in Texas during 1990, 1991 and 1992. Southwestern Entomol. 18, 79–89]. The potential impact of this immigrant on feral and managed colonies was the subject of considerable speculation. The goal o...

The loss of Apis mellifera L. colonies in recent years has, in many regions of the world, been alarmingly high. No single cause has been identified for these losses, but the interactions between several factors (mostly pathogens and parasites) have been held responsible. Work in the Americas on honeybees originating mainly from South Africa indicates that Africanised honeybees are less affected...

When workers of the thelytokous Cape honeybee, Apis mellifera capensis, come into contact with colonies of the neighboring arrhenotokous subspecies Apis mellifera scutellata, they can become lethal social parasites. We examined the inheritance of 3 traits (number of ovarioles, number of basitarsal hairs, and size of spermatheca) that are thought to be associated with reproductive potential in A...

to evaluate of drought stress and foliar application of zinc and iron on two annual medics species, experimental field was carried out with split factorial based on randomized complete block design in three replication with treatments of foliar application (controlled, fe, zn and iron+ zinc) and cutoff irrigation from (50% flowering , lower pod maturity,10 days before starting of flowering and ...