scholarly journals Relationships between resistance characteristics of honey bees (Apis mellifera) against Varroa mites (Varroa destructor)

2018 ◽  
Vol 19 (4) ◽  
pp. 954-958 ◽  
Author(s):  
Martin Buchegger ◽  
Ralph Buechler ◽  
Birgit Fuerst-Waltl ◽  
Marin Kovačić ◽  
Alfons Willam
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Varroa Mites

scholarly journals Exploring Two Honey Bee Traits for Improving Resistance Against Varroa destructor: Development and Genetic Evaluation

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 216
Author(s):  
Matthieu Guichard ◽  
Benoît Droz ◽  
Evert W. Brascamp ◽  
Adrien von Virag ◽  
Markus Neuditschko ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Field Trial ◽  
Genetic Evaluation ◽  
Phenotypic Correlation ◽  
Apis Mellifera Mellifera ◽  
Novel Traits ◽  
Resistance Traits

For the development of novel selection traits in honey bees, applicability under field conditions is crucial. We thus evaluated two novel traits intended to provide resistance against the ectoparasitic mite Varroa destructor and to allow for their straightforward implementation in honey bee selection. These traits are new field estimates of already-described colony traits: brood recapping rate (‘Recapping’) and solidness (‘Solidness’). ‘Recapping’ refers to a specific worker characteristic wherein they reseal a capped and partly opened cell containing a pupa, whilst ‘Solidness’ assesses the percentage of capped brood in a predefined area. According to the literature and beekeepers’ experiences, a higher recapping rate and higher solidness could be related to resistance to V. destructor. During a four-year field trial in Switzerland, the two resistance traits were assessed in a total of 121 colonies of Apis mellifera mellifera. We estimated the repeatability and the heritability of the two traits and determined their phenotypic correlations with commonly applied selection traits, including other putative resistance traits. Both traits showed low repeatability between different measurements within each year. ‘Recapping’ had a low heritability (h2 = 0.04 to 0.05, depending on the selected model) and a negative phenotypic correlation to non-removal of pin-killed brood (r = −0.23). The heritability of ‘Solidness’ was moderate (h2 = 0.24 to 0.25) and did not significantly correlate with resistance traits. The two traits did not show an association with V. destructor infestation levels. Further research is needed to confirm the results, as only a small number of colonies was evaluated.

scholarly journals Evaluating the Efficacy of 30 Different Essential Oils against Varroa destructor and Honey Bee Workers (Apis mellifera)

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1045
Author(s):  
Marian Hýbl ◽  
Andrea Bohatá ◽  
Iva Rádsetoulalová ◽  
Marek Kopecký ◽  
Irena Hoštičková ◽  
...  
Keyword(s):  
Essential Oils ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Mortality Rates ◽  
Selectivity Ratio ◽  
Varroa Mites ◽  
Main Components ◽  
Honey Bee Workers ◽  
Over Time ◽  
Better Than

Essential oils and their components are generally known for their acaricidal effects and are used as an alternative to control the population of the Varroa destructor instead of synthetic acaricides. However, for many essential oils, the exact acaricidal effect against Varroa mites, as well as the effect against honey bees, is not known. In this study, 30 different essential oils were screened by using a glass-vial residual bioassay. Essential oils showing varroacidal efficacy > 70% were tested by the complete exposure assay. A total of five bees and five mites were placed in the Petri dishes in five replications for each concentration of essential oil. Mite and bee mortality rates were assessed after 4, 24, 48, and 72 h. The LC50 values and selectivity ratio (SR) were calculated. For essential oils with the best selectivity ratio, their main components were detected and quantified by GC-MS/MS. The results suggest that the most suitable oils are peppermint and manuka (SR > 9), followed by oregano, litsea (SR > 5), carrot, and cinnamon (SR > 4). Additionally, these oils showed a trend of the increased value of selective ratio over time. All these oils seem to be better than thymol (SR < 3.2), which is commonly used in beekeeping practice. However, the possible use of these essential oils has yet to be verified in beekeeping practice.

scholarly journals Factors restraining the population growth of Varroa destructor in Ethiopian honey bees (Apis mellifera simensis)

PLoS ONE ◽  
2019 ◽  
Vol 14 (9) ◽  
pp. e0223236 ◽  
Author(s):  
Haftom Gebremedhn ◽  
Bezabeh Amssalu ◽  
Lina De Smet ◽  
Dirk C. de Graaf
Keyword(s):  
Apis Mellifera ◽  
Population Growth ◽  
Honey Bees ◽  
Varroa Destructor

Differential responses of Africanized and European honey bees (Apis mellifera) to viral replication following mechanical transmission or Varroa destructor parasitism

2015 ◽  
Vol 126 ◽  
pp. 12-20 ◽  
Author(s):  
Mollah Md. Hamiduzzaman ◽  
Ernesto Guzman-Novoa ◽  
Paul H. Goodwin ◽  
Mariana Reyes-Quintana ◽  
Gun Koleoglu ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Viral Replication ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Mechanical Transmission ◽  
Differential Responses

Genetic bases of tolerance to Varroa destructor in honey bees (Apis mellifera L.)

2014 ◽  
Vol 61 (3) ◽  
pp. 207-215 ◽  
Author(s):  
E. Zakar ◽  
A. Jávor ◽  
Sz. Kusza
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Genetic Bases

scholarly journals Regular dorsal dimples and damaged mites of Varroa destructor in some Iranian honey bees (Apis mellifera)

2011 ◽  
Vol 54 (3) ◽  
pp. 261-268 ◽  
Author(s):  
Masoud M. Ardestani ◽  
Rahim Ebadi ◽  
Gholamhossein Tahmasbi
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Varroa Destructor

scholarly journals Swarming in honey bees (Apis mellifera) and Varroa destructor population development in Sweden

Apidologie ◽  
2003 ◽  
Vol 34 (4) ◽  
pp. 389-397 ◽  
Author(s):  
Ingemar Fries ◽  
Henrik Hansen ◽  
Anton Imdorf ◽  
Peter Rosenkranz
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Varroa Destructor ◽  
Population Development

Gene expression in honey bee (Apis mellifera) larvae exposed to pesticides and Varroa mites (Varroa destructor)

2012 ◽  
Vol 58 (8) ◽  
pp. 1042-1049 ◽  
Author(s):  
Aleš Gregorc ◽  
Jay D. Evans ◽  
Mike Scharf ◽  
James D. Ellis
Keyword(s):  
Gene Expression ◽  
Apis Mellifera ◽  
Honey Bee ◽  
Varroa Destructor ◽  
Varroa Mites
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