Jes Johannesen
A5084989142- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Insect Pest Control Strategies
This short article presents loss rates of honey bee colonies over winter 2017/18 from 36 countries, including 33 in Europe, data collected using the standardized COLOSS questionnaire. The 25,363 beekeepers supplying passing consistency checks total wintered 544,879 colonies, and reported 26,379 (4.8%, 95% CI 4.7–5.0%) with unsolvable queen problems, 54,525 (10.0%, 9.8–10.2%) dead after another 8,220 (1.5%, 1.4–1.6%) lost through natural disaster. gave an overall rate 16.4% (95% 16.1–16.6%)...
This article presents managed honey bee colony loss rates over winter 2019/20 resulting from using the standardised COLOSS questionnaire in 37 countries. Six countries were outside Europe, including, for first time this series of articles, New Zealand. The 30,491 beekeepers Zealand reported 4.5% colonies with unsolvable queen problems, 11.1% dead after and 2.6% lost through natural disaster. gave an overall rate 18.1%, higher than previous year. varied greatly between countries, 7.4% to...
This article presents managed honey bee colony loss rates over winter 2018/19 resulting from using the standardised COLOSS questionnaire in 35 countries (31 Europe). In total, 28,629 beekeepers supplying valid data wintered 738,233 colonies, and reported 29,912 (4.1%, 95% confidence interval (CI) 4.0–4.1%) colonies with unsolvable queen problems, 79,146 (10.7%, CI 10.5–10.9%) dead after 13,895 (1.9%, 1.8–2.0%) lost through natural disaster. gave an overall rate of 16.7% (95% 16.4–16.9%),...
Abstract Beekeepers have various options to control the parasitic mite Varroa destructor in honey bee colonies, but no empirical data are available on methods they apply practice. We surveyed 28,409 beekeepers maintaining 507,641 colonies 30 European countries concerning methods. The set of 19 different diagnosis and measures was taken from annual COLOSS questionnaire colony losses. most frequent activities were monitoring infestations, drone brood removal, oxalic acid applications formic...
Winter loss rates of honey bee colonies may fluctuate highly between years in temperate climates. The present study combined survey data autumn and winter Germany (2012-2021) with estimates flow-assessed automated hive scales as the start flow spring its magnitude summer-with aim understanding annual fluctuations rates. Autumn colony were positively significantly correlated rates, whereas inversely related to following year. An early net predicted high both winter, cumulative led lower was...