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https://www.readbyqxmd.com/read/27886770/multiresidue-method-for-trace-pesticide-analysis-in-honeybee-wax-comb-by-gc-qqq-ms
#1
M D Gil García, S Uclés Duque, A B Lozano Fernández, A Sosa, A R Fernández-Alba
The aim of this analytical study is to develop an improved multi-residue methodology of high sensitivity and expanded scope for pesticide residue analysis in honeybee wax combs. The method was validated for 160 pesticide residues (including acaricides, insecticides, fungicides and herbicides) gas chromatography amenable and covering a wide variety of polarity and chemical structure. This method of analysis applied gas chromatography coupled to a triple quadrupole mass spectrometer for the quantitative analysis of pesticide residues...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27883042/two-novel-viruses-associated-with-the-apis-mellifera-pathogenic-mite-varroa-destructor
#2
Sofia Levin, Noa Sela, Nor Chejanovsky
Varroa destructor infestation of Apis mellifera colonies carries and/or promotes replication of honey bee viruses like the Deformed wing virus, the Varroa destructor virus-1, the Acute bee paralysis virus, the Israeli acute bee paralysis virus and the Kashmir bee virus that have been well described and characterized; but viruses exclusively associated with Varroa were not found. To look for viruses that may associate with- or infect V. destructor we performed deep sequencing (RNA-seq) of RNA extracted from honey bees and mites in Varroa-infested untreated colonies...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27852845/honey-bee-deformed-wing-virus-structures-reveal-conformational-changes-accompany-genome-release
#3
Lindsey J Organtini, Kristin L Shingler, Robert E Ashley, Elizabeth A Capaldi, Kulsoom Durrani, Kelly A Dryden, Alexander M Makhov, James F Conway, Marie C Pizzorno, Susan Hafenstein
: The picornavirus-like deformed wing virus (DWV) has been directly linked to colony collapse; however, little is known about the mechanisms of host attachment or entry for DWV or its molecular and structural details. Here we report the 3-D structures of DWV capsids isolated from infected honey bees, including the immature procapsid, genome-filled virion, putative entry intermediate (A-particle), and the empty capsid that remains after genome release. The capsids are decorated by large spikes around the five-fold vertices...
November 16, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27852222/differential-gene-expression-in-varroa-jacobsoni-mites-following-a-host-shift-to-european-honey-bees-apis-mellifera
#4
Gladys K Andino, Michael Gribskov, Denis L Anderson, Jay D Evans, Greg J Hunt
BACKGROUND: Varroa mites are widely considered the biggest honey bee health problem worldwide. Until recently, Varroa jacobsoni has been found to live and reproduce only in Asian honey bee (Apis cerana) colonies, while V. destructor successfully reproduces in both A. cerana and A. mellifera colonies. However, we have identified an island population of V. jacobsoni that is highly destructive to A. mellifera, the primary species used for pollination and honey production. The ability of these populations of mites to cross the host species boundary potentially represents an enormous threat to apiculture, and is presumably due to genetic variation that exists among populations of V...
November 16, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27829027/effect-of-1-3-1-6-%C3%AE-glucan-on-natural-and-experimental-deformed-wing-virus-infection-in-newly-emerged-honeybees-apis-mellifera-ligustica
#5
Maurizio Mazzei, Baldassare Fronte, Simona Sagona, Maria Luisa Carrozza, Mario Forzan, Federica Pizzurro, Carlo Bibbiani, Vincenzo Miragliotta, Francesca Abramo, Francesca Millanta, Marco Bagliacca, Alessandro Poli, Antonio Felicioli
The Western Honeybee is a key pollinator for natural as well as agricultural ecosystems. In the last decade massive honeybee colony losses have been observed worldwide, the result of a complex syndrome triggered by multiple stress factors, with the RNA virus Deformed Wing Virus (DWV) and the mite Varroa destructor playing crucial roles. The mite supports replication of DWV to high titers, which exert an immunosuppressive action and correlate with the onset of the disease. The aim of this study was to investigate the effect of 1,3-1,6 β-glucan, a natural innate immune system modulator, on honeybee response to low-titer natural and high-titer experimental DWV infection...
2016: PloS One
https://www.readbyqxmd.com/read/27812229/fine-scale-population-genetic-structure-of-varroa-destructor-an-ectoparasitic-mite-of-the-honey-bee-apis-mellifera
#6
Travis L Dynes, Jacobus C De Roode, Justine I Lyons, Jennifer A Berry, Keith S Delaplane, Berry J Brosi
Varroa destructor is an obligate ectoparasitic mite and the most important biotic threat currently facing honey bees (Apis mellifera). We used neutral microsatellites to analyze previously unreported fine scale population structure of V. destructor, a species characterized by extreme lack of genetic diversity owing to multiple bottleneck events, haplodiploidy, and primarily brother-sister matings. Our results surprisingly indicate that detectable hierarchical genetic variation exists between apiaries, between colonies within an apiary, and even within colonies...
2016: Apidologie
https://www.readbyqxmd.com/read/27812228/distance-between-honey-bee-apis-mellifera-colonies-regulates-populations-of-varroa-destructor-at-a-landscape-scale
#7
Maxcy P Nolan, Keith S Delaplane
Inter-colony distance of Apis mellifera significantly affects colony numbers of the parasitic mite Varroa destructor. We set up 15 apiaries, each consisting of two colonies. Each apiary pair was assigned an inter-colony distance of 0, 10, or 100 m. Colonies were rendered nearly mite-free, then one colony in each pair was seeded with 300 female mites (mite-donor colony), while the other remained uninoculated (mite-recipient colony). After four months of monitoring, a whole model analysis showed that apiaries in which colonies were spaced 100 m apart contained lower average mite numbers than 0 m or 10 m apiaries...
2016: Apidologie
https://www.readbyqxmd.com/read/27792333/synthesis-of-enantiopure-alicyclic-ethers-and-their-activity-on-the-chemosensory-organ-of-the-ectoparasite-of-honey-bees-varroa-destructor
#8
Govardhana Reddy Pinnelli, Nitin Singh, Victoria Soroker, Erika Plettner
The preparation of enantiopure conformationally restricted alicyclic ethers and their inhibitory activities on the chemosensory organ of the Varroa destructor, a parasite of honey bees, are reported in this article. We tested the effect of enantiopure ethers of cis 5-(2'-hydroxyethyl)cyclopent-2-en-1-ol on the Varroa chemosensory organ by electrophysiology, for their ability to inhibit the responses to two honey bee-produced odors that are important for the mite to locate its host: nurse bee head space odor and (E)--ocimene, a honey bee brood pheromone...
October 28, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27769283/behavioral-and-molecular-studies-of-quantitative-differences-in-hygienic-behavior-in-honeybees
#9
Tanja Gempe, Silke Stach, Kaspar Bienefeld, Marianne Otte, Martin Beye
BACKGROUND: Hygienic behavior (HB) enables honeybees to tolerate parasites, including infection with the parasitic mite Varroa destructor, and it is a well-known example of a quantitative genetic trait. The understanding of the molecular processes underpinning the quantitative differences in this behavior remains limited. RESULTS: We performed gene expression studies in worker bees that displayed quantitative genetic differences in HB. We established a high and low genetic source of HB performance and studied the engagements into HB of single worker bees under the same environmental conditions...
October 21, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27730366/changes-in-the-bacteriome-of-honey-bees-associated-with-the-parasite-varroa-destructor-and-pathogens-nosema-and-lotmaria-passim
#10
Jan Hubert, Martina Bicianova, Ondrej Ledvinka, Martin Kamler, Philip J Lester, Marta Nesvorna, Jan Kopecky, Tomas Erban
The honey bee, Apis mellifera, is a globally important species that suffers from a variety of pathogens and parasites. These parasites and pathogens may have sublethal effects on their bee hosts via an array of mechanisms, including through a change in symbiotic bacterial taxa. Our aim was to assess the influence of four globally widespread parasites and pathogens on the honey bee bacteriome. We examined the effects of the ectoparasitic mite Varroa destructor, the fungal pathogens Nosema apis and Nosema ceranae, and the trypanosome Lotmaria passim...
October 11, 2016: Microbial Ecology
https://www.readbyqxmd.com/read/27727312/importance-of-ecological-factors-and-colony-handling-for-optimizing-health-status-of-apiaries-in-mediterranean-ecosystems
#11
Irene Asensio, Marina Vicente-Rubiano, María Jesús Muñoz, Eduardo Fernández-Carrión, José Manuel Sánchez-Vizcaíno, Matilde Carballo
We analyzed six apiaries in several natural environments with a Mediterranean ecosystem in Madrid, central Spain, in order to understand how landscape and management characteristics may influence apiary health and bee production in the long term. We focused on five criteria (habitat quality, landscape heterogeneity, climate, management and health), as well as 30 subcriteria, and we used the analytic hierarchy process (AHP) to rank them according to relevance. Habitat quality proved to have the highest relevance, followed by beehive management...
2016: PloS One
https://www.readbyqxmd.com/read/27713534/moku-virus-a-new-iflavirus-found-in-wasps-honey-bees-and-varroa
#12
Gideon J Mordecai, Laura E Brettell, Purnima Pachori, Ethel M Villalobos, Stephen J Martin, Ian M Jones, Declan C Schroeder
There is an increasing global trend of emerging infectious diseases (EIDs) affecting a wide range of species, including honey bees. The global epidemic of the single stranded RNA Deformed wing virus (DWV), driven by the spread of Varroa destructor has been well documented. However, DWV is just one of many insect RNA viruses which infect a wide range of hosts. Here we report the full genome sequence of a novel Iflavirus named Moku virus (MV), discovered in the social wasp Vespula pensylvanica collected in Hawaii...
October 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27706787/effects-of-varroa-destructor-on-temperature-and-humidity-conditions-and-expression-of-energy-metabolism-genes-in-infested-honeybee-colonies
#13
C S Hou, B B Li, S Deng, Q Y Diao
Varroa destructor mites pose an increasing global threat to the apicultural industry and agricultural ecology; however, the issue of whether certain environmental factors reflect the level of mite infection is far from resolved. Here, a wireless sensor network (WSN) system was used to examine how V. destructor, which has vital impacts on honeybee (Apis mellifera) health and survival, affects the temperature and humidity of honeybee hives in a field experiment. This approach may facilitate early identification of V...
September 23, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27699501/the-glass-is-not-yet-half-empty-agitation-but-not-varroa-treatment-causes-cognitive-bias-in-honey-bees
#14
Helge Schlüns, Helena Welling, Julian René Federici, Lars Lewejohann
Honey bees (Apis mellifera) are prone to judge an ambiguous stimulus negatively if they had been agitated through shaking which simulates a predator attack. Such a cognitive bias has been suggested to reflect an internal emotional state analogous to humans who judge more pessimistically when they do not feel well. In order to test cognitive bias experimentally, an animal is conditioned to respond to two different stimuli, where one is punished while the other is rewarded. Subsequently a third, ambiguous stimulus is presented and it is measured whether the subject responds as if it expects a reward or a punishment...
October 3, 2016: Animal Cognition
https://www.readbyqxmd.com/read/27644949/large-scale-monitoring-of-effects-of-clothianidin-dressed-oilseed-rape-seeds-on-pollinating-insects-in-northern-germany-effects-on-honey-bees-apis-mellifera
#15
Daniel Rolke, Stefan Fuchs, Bernd Grünewald, Zhenglei Gao, Wolfgang Blenau
Possible effects of clothianidin seed-treated oilseed rape on honey bee colonies were investigated in a large-scale monitoring project in Northern Germany, where oilseed rape usually comprises 25-33 % of the arable land. For both reference and test sites, six study locations were selected and eight honey bee hives were placed at each location. At each site, three locations were directly adjacent to oilseed rape fields and three locations were situated 400 m away from the nearest oilseed rape field. Thus, 96 hives were exposed to fully flowering oilseed rape crops...
November 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27631761/haplotype-identification-and-detection-of-mitochondrial-dna-heteroplasmy-in-varroa-destructor-mites-using-arms-and-pcr-rflp-methods
#16
Bojan Gajić, Jevrosima Stevanović, Željko Radulović, Zoran Kulišić, Branislav Vejnović, Uroš Glavinić, Zoran Stanimirović
In the present study, amplification refractory mutation system (ARMS) and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) methods were used for identification of recently described Serbia 1 (S1) and Peshter 1 (P1) mitochondrial haplotypes of Varroa destructor. Based on single nucleotide polymorphisms (SNPs) within cytochrome oxidase 1 (cox1) and cytochrome b (cytb) gene sequences, a total of 64 adult V. destructor females were analyzed from locations where the S1 and P1 haplotypes had been detected previously...
November 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27615605/optimal-search-patterns-in-honeybee-orientation-flights-are-robust-against-emerging-infectious-diseases
#17
Stephan Wolf, Elizabeth Nicholls, Andrew M Reynolds, Patricia Wells, Ka S Lim, Robert J Paxton, Juliet L Osborne
Lévy flights are scale-free (fractal) search patterns found in a wide range of animals. They can be an advantageous strategy promoting high encounter rates with rare cues that may indicate prey items, mating partners or navigational landmarks. The robustness of this behavioural strategy to ubiquitous threats to animal performance, such as pathogens, remains poorly understood. Using honeybees radar-tracked during their orientation flights in a novel landscape, we assess for the first time how two emerging infectious diseases (Nosema sp...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27606819/go-east-for-better-honey-bee-health-apis-cerana-is-faster-at-hygienic-behavior-than-a-mellifera
#18
Zheguang Lin, Paul Page, Li Li, Yao Qin, Yingying Zhang, Fuliang Hu, Peter Neumann, Huoqing Zheng, Vincent Dietemann
The poor health status of the Western honey bee, Apis mellifera, compared to its Eastern counterpart, Apis cerana, is remarkable. This has been attributed to lower pathogen prevalence in A. cerana colonies and to their ability to survive infestations with the ectoparasitic mite, Varroa destructor. These properties have been linked to an enhanced removal of dead or unhealthy immature bees by adult workers in this species. Although such hygienic behavior is known to contribute to honey bee colony health, comparative data of A...
2016: PloS One
https://www.readbyqxmd.com/read/27583438/behavioral-modulation-of-infestation-by-varroa-destructor-in-bee-colonies-implications-for-colony-stability
#19
Joyce de Figueiró Santos, Flávio Codeço Coelho, Pierre-Alexandre Bliman
Colony Collapse Disorder (CCD) has become a global problem for beekeepers and for the crops that depend on bee pollination. While many factors are known to increase the risk of colony collapse, the ectoparasitic mite Varroa destructor is considered to be the most serious one. Although this mite is unlikely to cause the collapse of hives itself, it is the vector for many viral diseases which are among the likely causes for Colony Collapse Disorder. The effects of V. destructor infestation differ from one part of the world to another, with greater morbidity and higher colony losses in European honey bees (EHB) in Europe, Asia and North America...
2016: PloS One
https://www.readbyqxmd.com/read/27544258/key-management-practices-to-prevent-high-infestation-levels-of-varroa-destructor-in-honey-bee-colonies-at-the-beginning-of-the-honey-yield-season
#20
Agostina Giacobino, Ana Molineri, Natalia Bulacio Cagnolo, Julieta Merke, Emanuel Orellano, Ezequiel Bertozzi, Germán Masciangelo, Hernán Pietronave, Adriana Pacini, Cesar Salto, Marcelo Signorini
Varroa destructor is considered one of the main threats to worldwide apiculture causing a variety of physiological effects at individual and colony level. Also, Varroa mites are often associated with several honey bee viruses presence. Relatively low levels of Varroa during the spring, at the beginning of the honey yield season, can have a significant economic impact on honey production and colony health. Winter treatments against Varroa and certain management practices may delay mite population growth during following spring and summer improving colonies performance during the honey yield season...
September 1, 2016: Preventive Veterinary Medicine
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