scholarly journals The influence of acetamiprid and deltamethrin on the mortality and behaviour of honeybees (Apis mellifera carnica Pollman) in oilseed rape cultivations

Apidologie ◽  
2020 ◽  
Vol 51 (6) ◽  
pp. 1143-1154
Author(s):  
Daria Dworzańska ◽  
Graham Moores ◽  
Joanna Zamojska ◽  
Przemysław Strażyński ◽  
Paweł Węgorek

AbstractThe aim of the research was to determine the influence of acetamiprid and deltamethrin on the mortality and behaviour of honeybees of the same variety, coming from the same source and estimated to be in good condition by a professional beekeeper, but in different years and under different weather conditions. Results of research conducted in field isolators in oilseed rape fields in the years 2012–2018 showed no acetamiprid influence either on the mortality or on the behaviour of honeybees. Deltamethrin activity differed from a lack of influence through causing mortality and a weaker condition of honeybee colonies to the destruction of the colony. This demonstrates the relative safety of acetamiprid to honeybees and the high risk of deltamethrin use. The differences in the bee colonies’ reaction to deltamethrin are probably caused by the high acute toxicity of this active ingredient, genetically dependent, variable metabolic capabilities of particular bee colonies, or coexistence of a variety of different stressors—mainly pathogens.

2014 ◽  
Vol 58 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Beata Panasiuk ◽  
Małgorzata Bieńkowska ◽  
Dariusz Gerula ◽  
Paweł Węgrzynowicz

Abstract The susceptibility of bee larvae to Ascosphaera apis infestation and the hygienic behaviour of worker bees in relation to A. apis infected and freeze-killed brood were evaluated in three races of bees: Apis mellifera carnica, Apis mellifera caucasica, and Apis mellifera mellifera. Experimental bee colonies were evaluated in field conditions during the three beekeeping seasons. The lowest percentage of infected larvae was observed in car GR1 and mel A colonies (8.5% and 15%, respectively) and the highest in car Mr and cau P colonies (21% and 24.3%, respectively). Bees in the car GR1 and mel A colonies removed mummified brood in a shorter period of time (6.5 and 7.1 days on average, respectively) than car Mr and cau P colonies (above 8 days). Bees in the mel A and car GR1 colonies cleaned significantly more cells with freeze-killed brood within 24 and 48 hours (above 70% and 80% on average, respectively) than car Mr and cau P colonies (on average 10 - 20% lower cleaning rate). A low correlation coefficient was found for the susceptibility of larvae to A. apis infection and hygienic behaviour.


2011 ◽  
Vol 80 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Maja Ivana Smodiš Škerl ◽  
Mitja Nakrst ◽  
Lucija Žvokelj ◽  
Aleš Gregorc

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.


2017 ◽  
Vol 46 (2) ◽  
pp. 127-136
Author(s):  
A. Kandolf Borovšak ◽  
N. Ogrinc ◽  
N. Lilek ◽  
M. Korošec

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 254
Author(s):  
Abdulaziz S. Alqarni

In the subtropics, agricultural activities such as beekeeping are greatly influenced by environmental challenges. In the desert of Central Arabia, honeybees forage on limited prairies that are affected by adverse weather conditions. Bee colonies reduce their field activities during extremely hot-dry-windy weather. This study investigated whether nectar-rich melliferous flora enhance the field activities of two honeybee subspecies, Apis mellifera jemenitica (indigenous) and A. m. carnica (exotic), despite the presence of severe weather conditions. The foraging and pollen-gathering activities of the two subspecies were evaluated on Acacia trees (Acacia gerrardii Benth.), a common subtropical, summery endemic bee plant, in the central desert of the Arabian Peninsula. The native colonies were significantly (p < 0.001) more active foragers than the exotic colonies (109 ± 4 and 49 ± 2 workers/colony/3 min, respectively). Similarly, the native colonies recruited significantly (p ˂ 0.01) more active pollen-gathering bees than the imported colonies (22 ± 1 and 7 ± 1 workers/colony/3 min, respectively). Furthermore, far more food was collected by the indigenous colonies than by the exotic colonies, and a higher portion of all field trips was allocated to pollen gathering by the indigenous bees than by the imported bees. The nectar-rich Acacia trees reduced the negative effects of hot-dry-windy weather. More research on honeybee colonies operating in the subtropical conditions of Central Arabia is needed, especially regarding heat tolerance mechanisms and effects on queen and drone fertility.


Poljoprivreda ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 73-76 ◽  
Author(s):  
Zlatko Puškadija ◽  
◽  
Lejla Spiljak ◽  
Marin Kovačić

2007 ◽  
Vol 23 (5-6-1) ◽  
pp. 609-617 ◽  
Author(s):  
G. Jevtic ◽  
M. Mladenovic ◽  
Z. Lugic ◽  
D. Sokolovic

Morphological and production characteristics of honey bee colonies from six regions in Serbia were examined in a two-year study. The colonies were sampled in the valleys of the Rasina and Morava rivers, on Pester and Kopaonik mountains, in Knjazevac environ and Banat region. Fifty bees with characteristic morphology were sampled from each colony. Colony behavior was evaluated during spring and autumn inspection in 2002 and 2003. Colonies of the Rasina ecotype were found to have the highest average values of three of the six investigated morphological parameters: basitarsus length and width, and tarsal index. The Morava ecotype had the longest proboscis (tongue), Banat ecotype the longest wings, while Timok colonies had the greatest wing width. Swarming instinct was greatly influenced by climatic factors. Colony disposition was found to depend crucially on the geographic factor. Colonies of the Kopaonik ecotype, and especially those from Mt. Pester, were problematic for handling. Robbing depended significantly on colony strength and disposition, especially in weaker and calmer ones.


Apidologie ◽  
1999 ◽  
Vol 30 (4) ◽  
pp. 299-310 ◽  
Author(s):  
Karl Crailsheim ◽  
Ulrike Riessberger ◽  
Birgit Blaschon ◽  
Richard Nowogrodzki ◽  
Norbert Hrassnigg

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