The toxicity of various concentrations of oxalic acid dihydrate (OA) in aqueous and sucrose solution to Varroa destructor and to honey bees (Apis mellifera) was assessed using submersion tests of caged bees and by spraying bees in colonies with and without brood. An aqueous solution of 0.5% OA gave effective control of the mite and was non-toxic to bees whereas higher...
Multivariate morphometric analyses of Apis cerana Fabricius, 1793 across its full geographical range were performed. Principal components plots did not reveal distinct morphoclusters. Further substructuring of the principal component plots could not initially be derived but only by introducing local labelling did it reveal six main morphoclusters. We apply geographically based...
The objectives of this study were to (1) determine the effects of imported commercial queen bees from different geographical origin subspecies on the morphological variation of native honeybee population of the Turkeli area; and (2) apply a model to identify and predict the use of commercial queens subspecies. Standard classification function, discriminant function, and constant...
The composition of honey samples of Plebeia wittmanni (n = 10) and Tetragonisca angustula fiebrigi (n = 12) was analysed. The colours of all collected honeys were amber to dark amber and the pH varied. Moisture was lower than reported for other stingless bee honeys. Conductivity and ash content of P. wittmanni honey were higher than for T. angustula fiebrigi. Acidity of P...
