ASPECTS OF THE HISTORY AND BIOGEOGRAPHY OF THE BEE MITES Tropilaelaps clareae AND T. koenigerum
ثبت نشده
چکیده
The paper deals with aspects of the two known brood parasites of honey bees from Asia, namely the tropical bee mites Tropilaelaps clareae Delfinado et Baker and Tropilaelaps koenigerum Delfinado-Baker et Baker. These species of Tropilaelaps belong to the family Laelapidae (Mesostigmata). They feed on bee larvae and pupae causing brood malformation and the death of bees. T. clareae occurs on 5 species of bee Apis cerana, A. dorsata, A. florea, A. laboriosa and A. mellifera. T. clareae is known to have a wide disribution in Asia extending eastwards from Iran to Papua New Guinea. T. koenigerum on the other hand and as far as is known at present, has a more restricted distribution. Because of the great interest in Varroa and to a lesser extent Acarapis woodi Rennie, the importance of Tropilaelaps mites has not been sufficiently recognised. There is some concern that Tropilaelaps may become established on A. mellifera in temperate climates. Tropilaelaps mites therefore are an important potential threat to beekeeping in parts of the world other than South-East Asia.
منابع مشابه
Gains from diversification on convex combinations: A majorization and stochastic dominance approach
By incorporating both majorization theory and stochastic dominance theory, this paper presents a general theory and a unifying framework for determining the diversification preferences of risk-averse investors and conditions under which they would unanimously judge a particular asset to be superior. In particular, we develop a theory for comparing the preferences of different convex combination...
متن کاملImproved immunogenicity of tetanus toxoid by Brucella abortus S19 LPS adjuvant.
BACKGROUND Adjuvants are used to increase the immunogenicity of new generation vaccines, especially those based on recombinant proteins. Despite immunostimulatory properties, the use of bacterial lipopolysaccharide (LPS) as an adjuvant has been hampered due to its toxicity and pyrogenicity. Brucella abortus LPS is less toxic and has no pyrogenic properties compared to LPS from other gram negati...
متن کاملSteady electrodiffusion in hydrogel-colloid composites: macroscale properties from microscale electrokinetics.
A rigorous microscale electrokinetic model for hydrogel-colloid composites is adopted to compute macroscale profiles of electrolyte concentration, electrostatic potential, and hydrostatic pressure across membranes that separate electrolytes with different concentrations. The membranes are uncharged polymeric hydrogels in which charged spherical colloidal particles are immobilized and randomly d...
متن کاملPerturbative Analysis of Dynamical Localisation
In this paper we extend previous results on convergent perturbative solutions of the Schrödinger equation of a class of periodically timedependent two-level systems. The situation treated here is particularly suited for the investigation of two-level systems exhibiting the phenomenon of (approximate) dynamical localisation. We also present a convergent perturbative expansion for the secular fre...
متن کاملCollinear contextual suppression
The context of a target can modulate behavioral as well as neural responses to that target. For example, target processing can be suppressed by iso-oriented surrounds whereas it can be facilitated by collinear contextual elements. Here, we present experiments in which collinear elements exert strong suppression whereas iso-oriented contextual surrounds yield no contextual modulation--contrary t...
متن کامل