scholarly journals Varroa destructor infestation impact on Apis mellifera carnica capped worker brood production, bee population and honey storage in a Mediterranean climate

Apidologie ◽  
2002 ◽  
Vol 33 (3) ◽  
pp. 271-281 ◽  
Author(s):  
Ant�nio Manuel Murilhas
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
Mediterranean Climate ◽  
Brood Production ◽  
Apis Mellifera Carnica ◽  
Worker Brood

scholarly journals Low fertility, fecundity and numbers of mated female offspring explain the lower reproductive success of the parasitic mite Varroa destructor in African honeybees

Parasitology ◽  
2018 ◽  
Vol 145 (12) ◽  
pp. 1633-1639 ◽  
Author(s):  
Beatrice T. Nganso ◽  
Ayuka T. Fombong ◽  
Abdullahi A. Yusuf ◽  
Christian W. W. Pirk ◽  
Charles Stuhl ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Reproductive Success ◽  
Varroa Destructor ◽  
Female Offspring ◽  
Low Fertility ◽  
Mite Infestation ◽  
Unmated Female ◽  
Mite Reproduction ◽  
Worker Brood ◽  
Honeybee Subspecies

AbstractAlthough Varroa destructor is the most serious ecto-parasite to the honeybee, Apis mellifera L., some honeybee populations such as Apis mellifera scutellata in Kenya can survive mite infestations without treatment. Previously, we reported that grooming behaviour could be a potential tolerant mechanism expressed by this honeybee subspecies towards mite infestation. However, both hygienic and grooming behaviours could not explain the lower mite-infestation levels recorded in these colonies. Here, we investigated the involvement of other potential resistant mechanisms including suppression of mite reproduction in worker brood cells of A. m. scutellata to explain the low mite numbers in their colonies. High infertility rates (26–27%) and percentages of unmated female offspring (39–58%) as well as low fecundity (1.7–2.2, average offspring produced) were identified as key parameters that seem to interact with one another during different seasons to suppress mite reproduction in A. m. scutellata colonies. We also identified offspring mortality in both sexes and absence of male offspring as key factors accounting for the low numbers of mated daughter mites produced in A. m. scutellata colonies. These results suggest that reduced mite reproductive success could explain the slow mite population growth in A. m. scutellata colonies.

Varroa destructor (Acari: Varroidae) infestation in queen, worker, and drone brood of Apis mellifera (Hymenoptera: Apidae)

2002 ◽  
Vol 134 (3) ◽  
pp. 381-390 ◽  
Author(s):  
M.T. Santillán-Galicia ◽  
G. Otero-Colina ◽  
C. Romero-Vera ◽  
J. Cibrián-Tovar
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
Egg Laying ◽  
Choice Test ◽  
Simultaneous Test ◽  
Adult Females ◽  
Drone Brood ◽  
Worker Brood

AbstractVarroa destructor Anderson and Trueman females were placed in contact with queen, worker, and drone brood cells of Apis mellifera L. that were soon to be sealed. In a non-choice test, V. destructor adult females were introduced into a comb containing either queen or worker brood cells; 0.62 and 18.28% of the mites entered the queen and worker brood cells, respectively. Only 1 of the 11 mites that entered queen brood cells oviposited, laying a single egg. In another test, brood cells were combined in the same comb in a 1:25:3 queen:worker:drone ratio. The percentages of egg-laying mites in queen, worker, and drone brood cells were 16.66, 61.86, and 79.06%, respectively. When queen, worker, and drone brood cells were combined in equal proportions (33.3:33.3:33.3), percent infestation was significantly different among queen (3.25%), worker (49.12%), and drone (90.07%) brood. Multiple infestation was found in drone brood cells but not in others. Also, mites were inoculated into sealed queen cells. These cells contained either one or two mites (either at the egg or protonymph stage). Conversely, in a simultaneous test with worker brood cells, the offspring per foundress mite included a mean of three individuals (either at the egg, protonymph, or deutonymph stage). It is concluded that V. destructor can infest queen, worker, and drone brood cells, but drone brood cells are preferred; in addition, queen brood cells do not provide an optimal environment for reproduction because it causes a delay in mite oviposition and (or) progeny development.

scholarly journals The acaricidal effect of flumethrin, oxalic acid and amitraz against Varroa destructor in honey bee (Apis mellifera carnica) colonies

2011 ◽  
Vol 80 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Maja Ivana Smodiš Škerl ◽  
Mitja Nakrst ◽  
Lucija Žvokelj ◽  
Aleš Gregorc
Keyword(s):  
Apis Mellifera ◽  
Oxalic Acid ◽  
Honey Bee ◽  
Varroa Destructor ◽  
Colony Development ◽  
Apis Mellifera Carnica ◽  
Brood Rearing ◽  
Mite Control ◽  
Bee Colonies ◽  
Mite Mortality

During 2007 and 2008, natural mite mortality was recorded in honey bee colonies. These colonies were then treated with various acaricides against Varroa destructor and acaricide efficacies were evaluated. In 2007, experimental colonies were treated with flumethrin and/or oxalic acid and in 2008 the same colonies were treated with flumethrin, oxalic acid or amitraz. The efficacy of flumethrin in 2007 averaged 73.62% compared to 70.12% for three oxalic acid treatments. In 2008, a reduction of 12.52% in mite numbers was found 4 weeks after flumethrin application, while 4 oxalic acid applications produced significantly higher (P < 0.05) mite mortality, an average of 24.13%. Four consecutive amitraz fumigations produced a 93.82% reduction on average in final mite numbers and thus ensure normal colony development and overwintering. The study is important in order to demonstrate that synthetic acaricides should be constantly re-evaluated and the use of flumethrin at low efficacies need to be superseded by appropriate organic treatments to increase the efficacy of mite control in highly-infested colonies during the period of brood rearing.

scholarly journals Correction: Floris, I., et al. How the Infestation Level of Varroa destructor Affects the Distribution Pattern of Multi-Infested Cells in Worker Brood of Apis mellifera. Veterinary Science 2020, 7, 136

2020 ◽  
Vol 7 (4) ◽  
pp. 202
Author(s):  
Ignazio Floris ◽  
Michelina Pusceddu ◽  
Alberto Satta
Keyword(s):  
Apis Mellifera ◽  
Distribution Pattern ◽  
Varroa Destructor ◽  
Infestation Level ◽  
Veterinary Science ◽  
Journal Editorial ◽  
Worker Brood

We have recently been made aware by the reviewer and the Journal Editorial Offices of the following weaknesses in our recent paper [...]

scholarly journals Reproductive parameters of female Varroa destructor and the impact of mating in worker brood of Apis mellifera

Apidologie ◽  
2019 ◽  
Vol 51 (3) ◽  
pp. 342-355 ◽  
Author(s):  
Claudia Katharina Häußermann ◽  
Agostina Giacobino ◽  
Rosalie Munz ◽  
Bettina Ziegelmann ◽  
María Alejandra Palacio ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
Reproductive Parameters ◽  
Worker Brood ◽  
The Impact

Supplementing with vitamin C the diet of honeybees (Apis mellifera carnica) parasitized with Varroa destructor: effects on antioxidative status

Parasitology ◽  
2014 ◽  
Vol 141 (6) ◽  
pp. 770-776 ◽  
Author(s):  
MAREK FARJAN ◽  
ELŻBIETA ŁOPIEŃSKA-BIERNAT ◽  
ZBIGNIEW LIPIŃSKI ◽  
MAŁGORZATA DMITRYJUK ◽  
KRYSTYNA ŻÓŁTOWSKA
Keyword(s):  
Apis Mellifera ◽  
Vitamin C ◽  
Protein Content ◽  
Varroa Destructor ◽  
Developmental Stages ◽  
Total Antioxidant Status ◽  
Antioxidative System ◽  
Control Group ◽  
Apis Mellifera Carnica ◽  
Antioxidative Status

SUMMARYWe studied a total of eight developmental stages of capped brood and newly emerged workers of Apis mellifera carnica colonies naturally parasitized with Varroa destructor. During winter and early spring four colonies were fed syrup containing 1·8 mg vitamin C kg−1 (ascorbic acid group; group AA) while four colonies were fed syrup without the vitamin C (control group C). Selected elements of the antioxidative system were analysed including total antioxidant status (TAS), glutathione content and antioxidative enzyme activities (superoxide dismutase, catalase, peroxidase and glutathione S-transferase). Body weight, protein content and indices of infestation were also determined. The prevalence (8·11%) and intensity (1·15 parasite per bee) of the infestation were lower in group AA compared with group C (11·3% and 1·21, respectively). Changes in the indicators of antioxidative stress were evidence for the strengthening of the antioxidative system in the brood by administration of vitamin C. In freshly emerged worker bees of group AA, despite the infestation, protein content, TAS, and the activity of all antioxidative enzymes had significantly higher values in relation to group C.

scholarly journals Use of Thymol Formulations, Amitraz, and Oxalic Acid for the Control of the Varroa Mite in Honey Bee (Apis mellifera carnica) Colonies

2012 ◽  
Vol 56 (2) ◽  
pp. 61-69 ◽  
Author(s):  
Aleš Gregorc ◽  
Ivo Planinc
Keyword(s):  
Apis Mellifera ◽  
Oxalic Acid ◽  
Honey Bee ◽  
Varroa Destructor ◽  
Oxalic Acid Solution ◽  
Natural Mortality ◽  
Varroa Mite ◽  
Comparative Efficacy ◽  
Apis Mellifera Carnica ◽  
Mite Mortality

Abstract Experiments were conducted in three apiaries to assess the comparative efficacy of: Thymovar (Andermatt BioVet AG); Apiguard (Vita Europe Ltd., UK); an oxalic acid solution (OA) which consisted of 2.9% oxalic acid and 31.9% sugar in water; and amitraz fumigation, for controlling the honey bee mite Varroa destructor. Mite mortality increased significantly (p<0.001) in the Thymovar, Apiguard, OA or amitraz treated colonies. The relative mite mortality after: four OA applications, two Thymovar or two Apiguard applications during August and September in the Senično apiary was 41.80% (±14.31), 14.35% (±10.71), and 18.93% (±13.56), respectively. In the control, i.e. untreated colonies, the mite natural mortality was reduced by 3.10% (±3.50). In the Bohinj apiary, two Apiguard applications and a single amitraz treatment resulted in reducing the mite populations by 19.71% (±12.61) and 23.89% (±14.25), respectively. At the Mediterranean located apiary of Vipava, the Thymovar and Apiguard treatments trigged 59.02% (±17.28) and 46.50% (±13.33) of the total mite reduction. In the Vipava apiary, colonies treated with any miticide during the brood period presented no difference (P>0.05) in efficacy. The results indicate that OA, Thymovar, Apiguard or amitraz fumigations are of limited use during the brood periods.

Spermatozoa production in male Varroa destructor and its impact on reproduction in worker brood of Apis mellifera

2018 ◽  
Vol 74 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Claudia Katharina Häußermann ◽  
Bettina Ziegelmann ◽  
Peter Rosenkranz
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
Worker Brood
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