scholarly journals Uncapping activity of Apis mellifera L. (Hymenoptera: Apidae) towards worker brood cells infested with the mite Varroa destructor Anderson & Treuman (Mesostigmata: Varroidae)

2006 ◽  
Vol 35 (3) ◽  
pp. 299-301 ◽  
Author(s):  
Geraldo Moretto ◽  
José C.V. Guerra Jr. ◽  
Carolina V. Bittencourt
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
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 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

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

scholarly journals Efficacy of animal origin products and ajwain powder against honey bee diseases in Apis mellifera (Linnaeus) colonies in Uttarakhand-A novel eco-friendly approach

2014 ◽  
Vol 6 (1) ◽  
pp. 68-75
Author(s):  
Ruchira Tiwari ◽  
Meena Dhami ◽  
Vaibhav Mathur ◽  
Brijesh Bisht
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Varroa Destructor ◽  
Mite Infestation ◽  
Animal Origin ◽  
Cow Dung ◽  
Sugar Syrup ◽  
Synthetic Chemicals ◽  
Cow Urine ◽  
Worker Brood

The studies to manage the honey bee bacterial European foul brood ( EFB) disease caused by Melisococcus plutonius and ectoparasitic brood mite disease caused by Varroa destructor in the colonies of Apis mellifera (L.) at different locations of Uttarakhand were conducted during 2012- 2013 by applying eco-friendly formulations i.e. spraying of cow urine (desi cow breed), plant decoctions prepared in cow urine, cow dung cake and cow dung ash powders , ajwain seed powder and compared to an antibiotic, terramycin sugar syrup and synthetic chemicals, sulphur and thymol powder with two applications in a month. The data revealed that the cow urine sprays @ 50, 75 and 100% reduced the disease infection to below detectable limit in 10 to 14 days, respectively, as terramycin treated infected colonies where only 50-55% recovery was seen in EFB infection with highest sealed worker brood areas ( SWBA) in cow urine treated honeybee colonies in comparison to terramycin and untreated colonies. Similarly, on the other hand, cow urine (100%) significantly reduced brood mite infestation (72.10%) with highest mean mite fall (48.73) and highest (SWBA) (854.00 cm2) followed by ajwain powder with reduction in brood mi te infestation(65.84%) with mite fall (46.39) and SWBA (749.00 cm2), cow dung powder with reduction in brood mite infestation (71.35%) ,mite fall ( 42.87), SWBA (682.33 cm2), , followed by cow dung ash powder, cow urine @ 25%, in comparison to plant decoctions prepared in cow urine, synthetic chemicals i.e. thymol and sulphur powder after 4 weeks of treatments. Thus, the animal origin products and ajwain powder can serve as apotential eco- friendly measure for management of honeybee diseases in A. mellifera colonies at different locations of Uttarakhand as they significantly increased sealed worker brood area without affecting the activities of workers, queen bee and bee brood in comparison to chemicals and plant decoctions.

УГРОЗЫ РАСПРОСТРАНЕНИЯ ВИРУСНЫХ ИНФЕКЦИЙ У ПЧЕЛ (Apis mellifera L.) И РОЛЬ КЛЕЩА Varroa destructor В РАЗВИТИИ ПАТОЛОГИЙ

2016 ◽  
Vol 51 (2) ◽  
pp. 156-171
Author(s):  
А.В. СПРЫГИН ◽  
◽  
Ю.Ю. БАБИН ◽  
Е.М. ХАНБЕКОВА ◽  
Л.Е. РУБЦОВА ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor

Eficacia del humo de frutos de Guazuma ulmifolia (Sterculiaceae) y vapores de timol para el control de Varroa destructor infestando abejas africanizadas

2019 ◽  
Vol 10 (3) ◽  
pp. 778-788
Author(s):  
William De Jesús May-Itzá ◽  
Luis Abdelmir Abdelmir Medina Medina
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor ◽  
Guazuma Ulmifolia

Se evaluó la eficacia del humo de los frutos secos de Guazuma ulmifolia y los vapores de timol en el control del ácaro Varroa destructor infestando colonias de abejas africanizadas (Apis mellifera) de Yucatán. Se utilizaron tres tratamientos: Grupo 1 (G1), las colonias de abejas recibieron 5 a 8 bocanadas de humo de los frutos secos de G. ulmifolia dos veces por semana, durante un período de tres semanas; Grupo 2 (G2), las colonias recibieron 4-8 g de cristales de timol con tres aplicaciones cada siete días, y Grupo 3 (G3 o grupo control) las colonias no recibieron ningún tratamiento durante las tres semanas del experimento. Se colectaron 200 a 300 abejas adultas de cada colonia previo a la aplicación de los tratamientos (día 0) y a los 7, 14 y 21 días después de las aplicaciones, con la finalidad de determinar los niveles de infestación y eficacia de los tratamientos. Los resultados indican que los niveles de infestación de V. destructor en las abejas adultas disminuyeron al final del experimento (21 días) y fueron estadísticamente diferentes para los tres tratamientos, siendo menor para G2. La eficacia al final de los tratamientos fue de 41 y 69 %, para G1 y G2, respectivamente. Estos resultados corroboran que la aplicación de cristales de timol es una alternativa para el control del ácaro V. destructor en Yucatán, y que la aplicación del humo de los frutos secos de G. ulmifolia reduce los niveles de infestación de este parásito en comparación con las colonias que no recibieron ningún tipo de tratamiento (G3).

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.

Sign in / Sign up

Export Citation Format

Share Document