Risk indicators affecting honeybee colony survival in Europe: one year of surveillance

Chauzat, Marie‐Pierre; Jacques, Antoine; Laurent, Marion; Bougeard, Stéphanie; Hendrikx, Pascal; Ribière‐Chabert, Magali

doi:10.1007/s13592-016-0440-z

Cited by 69 publications

(75 citation statements)

References 21 publications

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“…The statistical analysis of our data from the first year has shown that size of the operation, apiary and the clinical disease (varroosis, AFB and nosemosis) observed during the previous autumn were significant risk indicators of overwinter honey bee colony survival [20]. In the present study, our findings find a similar result when considering two study years.…”

Section: Discussionsupporting

confidence: 83%

A pan-European epidemiological study reveals honey bee colony survival depends on beekeeper education and disease control

Laurent²,

et al. 2017

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Reports of honey bee population decline has spurred many national efforts to understand the extent of the problem and to identify causative or associated factors. However, our collective understanding of the factors has been hampered by a lack of joined up trans-national effort. Moreover, the impacts of beekeeper knowledge and beekeeping management practices have often been overlooked, despite honey bees being a managed pollinator. Here, we established a standardised active monitoring network for 5 798 apiaries over two consecutive years to quantify honey bee colony mortality across 17 European countries. Our data demonstrate that overwinter losses ranged between 2% and 32%, and that high summer losses were likely to follow high winter losses. Multivariate Poisson regression models revealed that hobbyist beekeepers with small apiaries and little experience in beekeeping had double the winter mortality rate when compared to professional beekeepers. Furthermore, honey bees kept by professional beekeepers never showed signs of disease, unlike apiaries from hobbyist beekeepers that had symptoms of bacterial infection and heavy Varroa infestation. Our data highlight beekeeper background and apicultural practices as major drivers of honey bee colony losses. The benefits of conducting trans-national monitoring schemes and improving beekeeper training are discussed.

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Section: Discussionsupporting

confidence: 83%

A pan-European epidemiological study reveals honey bee colony survival depends on beekeeper education and disease control

Laurent²,

et al. 2017

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“…Тривають дискусії щодо впливу на здоров`я та життєдіяльність бджіл низки різноманітних факторів: застосування пестицидів (зокрема, неонікотиноїдів), зменшення різноманіття квіткових рослин, поширення хвороб та паразитів, вирощування генетично модифікованих культур, електромагнітне випромінювання, забруднення води, повітря та ґрунтів та ін. (Chauzat et al, 2016;Genersch et al, 2010;Godfray, 2014). Україна характеризується вдалим поєднанням комплексу факторів, що створюють передумову до зростання кількості колоній Apis mellifera L. (сприятливий помірний клімат, порівняно великі площі непосівних земель, а також значні площі земель, зайняті під вирощування соняшнику, з якого отримують популярний тип меду).…”

Section: моніторинг втрат колоній медоносних бджілunclassified

“…(COLOSS…, 2017;Brodschneider et al, 2016). Цієї зими всеєвропейська програма нагляду, що проводилась в 17 країнах, констатувала зимову смертність на основі польових досліджень в діапазоні від 4,7% до 30,6% в різних країнах (Chauzat et al, 2016). Встановлено, що клінічно виявлені захворювання (варроатоз, американський гнилець і нозематоз) перед заходом колоній в зиму вносять значний внесок в зимову смертність.…”

Section: результати досліджень та їх обговоренняunclassified

“…1). Отримані нами дані узгоджуються з відомостями з інших країн-учасниць міжнародного моніторингу (Chauzat et al, 2016;Seitz et al, 2015;van der Zee et al, 2014). Очевидно, що управління та догляд за великими (промисловими) пасіками здійснюється більш організовано та ефективно, ніж за любительськими.…”

Section: моніторинг втрат колоній медоносних бджілunclassified

“…Increasing of honey bee colony losses is considered to be a global threat to the planet's ecosystems, food security and global economy (Neumann & Carreck, 2010;van der Zee et al, 2012;van der Zee et al, 2014;Chauzat et al, 2016). A large-scale study of this phenomenon using the standard protocol is conducted by the international honey bee research association COLOSS.…”

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Моніторинг втрат колоній медоносних бджіл (Apis mellifera L.) в Україні після зимівлі 2015-2016 рр.

et al. 2017

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Increasing of honey bee colony losses is considered to be a global threat to the planet's ecosystems, food security and global economy (Neumann & Carreck, 2010;van der Zee et al., 2012;van der Zee et al., 2014;Chauzat et al., 2016). A large-scale study of this phenomenon using the standard protocol is conducted by the international honey bee research association COLOSS.Ukraine has been providing the data since 2015. Honey bee (Apis mellifera L.) colony losses in Ukraine after the winter of 2015-2016 have been analyzed according to the physiographic zones of the country. It has been established that the total loss (the sum of the dead colonies and the colonies lost due to the unsolvable queen problems) after the winter of 2015-2016 was 9.9%, which is 1.5 times lower compared to the winter of 2014-2015 (14.9%). The losses due to colonies death decreased (6.3% after the winter of 2015-2016; 13.4% after the winter of [2014][2015], while the losses due to the unsolvable queen problems increased (3.6% after the winter of 2015-2016; 1.6% after the winter of [2014][2015]. The overall loss rate of 12.0% was recorded for the countries participating in the international COLOSS monitoring after the winter of 2015-2016, therefore Ukraine is considered to be the region with the comparatively low risk. Small apiaries had a significantly higher loss rate than medium and large ones. The highest loss rate was noticed in the zone of mixed forests, whereas it was the lowest in the deciduous forest zone. The majority of the respondents (44.4%) from the mixed forest zone, where the loss due to the unsolvable queen problems reached the largest scale, noted that the problems with the queens after this winter were more serious than usual, and wintering of the colonies with new queens was better, than with the old ones (83.3%). 64.4% of respondents conducted monitoring of Varroa infestation level of their colonies, and 82.5% treated the colonies against Varroa. The correlation between the use of some chemical and biotechnical methods against Varroa (lactic acid, amitraz, formic acid, hyperthermia, etc.) and losses due to both colonies death and unsolvable queen problems was revealed. It has been shown that queen replacement before winter contributes to lowering winter mortality (r = -0.18).

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Lithium salts: assessment of their chronic and acute toxicities to honey bees and their anti‐Varroa field efficacy

Sevin

Bommuraj

Chen

et al. 2022

Pest Management Science

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BACKGROUND Varroa control is essential for the maintenance of healthy honey bee colonies. Overuse of acaricides has led to the evolution of resistance to those substances. Studies of the short‐term acaricidal effects and safety of various lithium (Li) salts recently have been reported. This study examined the long‐term in vitro and in vivo bee toxicities, short‐term motor toxicity to bees and long‐term anti‐Varroa field efficacy of several Li salts. RESULTS In an in vitro chronic‐toxicity assay, lithium citrate (18.8 mm) was the most toxic of the examined salts, followed by lithium lactate (29.5 mm), and lithium formate (32.5 mm). In terms of acute locomotor toxicity to bees, all of the Li salts were well‐tolerated and none of the treatment groups differed from the negative control group. In an in vitro survival study, all of the Li treatments significantly reduced bee life spans by a factor of 1.8–7.2, as compared to the control. In terms of life expectancy, lithium citrate was the most toxic salt, with no significant differences noted between lithium formate and lithium lactate. In the bee‐mortality field study, none of the examined treatments differed from the negative control. Amitraz and lithium formate exhibited similar acaricide effects, which were significantly different from those observed for lithium lactate and the negative control. CONCLUSION In light of lithium formate's honey bee safety and efficacy as an acaricide, additional sublethal toxicity studies in brood, drones and queens, as well as tests aimed at the optimization of administration frequency are warranted. © 2022 Society of Chemical Industry.

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Risk indicators affecting honeybee colony survival in Europe: one year of surveillance

Cited by 69 publications

References 21 publications

A pan-European epidemiological study reveals honey bee colony survival depends on beekeeper education and disease control

A pan-European epidemiological study reveals honey bee colony survival depends on beekeeper education and disease control

Моніторинг втрат колоній медоносних бджіл (Apis mellifera L.) в Україні після зимівлі 2015-2016 рр.

Lithium salts: assessment of their chronic and acute toxicities to honey bees and their anti‐Varroa field efficacy

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