Combination of thymol treatment (Apiguard®) and caging the queen technique to fight Varroa destructor

International audienceAbstractGuaranteeing high acaricide efficacy to control Varroa destructor is fundamental for colony survival. In this study, we verified the efficacy and impact of a commercial thymol-based veterinary product (Apiguard®) on colony honey bee populations when used alone or combined with the biotechnical method of caging honey bee queens to create an artificial brood interruption period in the colony. Apiguard® killed 76.1% of the mites while queen caging killed 40.6% of the mites. The combination of Apiguard® administration with queen caging killed 96.8% of the mites. Comparing bee numbers before and after treatment, Apiguard® treated colonies with caged queens had 48.7% fewer bees compared to before treatment, while Apiguard® alone reduced the number of adult bees by 13.6%. None of the treatments in the different groups resulted in elevated queen mortality

Veterinari i pčelarstvo: Koje su uloge, očekivanja i perspektive u budućnosti? – pregledni rad.

Apiculture is an important economy sector, facing a real health crisis. Honeybees, as well as other insect pollinator populations have been in decline over recent decades, and diseases are one of the principal challenges. To face this situation, public and private veterinary services are needed to manage surveillance, control, eradication and prevention measures of honeybee diseases within their territories, in close collaboration with beekeepers and farmers. It is necessary urgently to clarify the current problems and threats to apiculture in the public health sector. Due to possible interactions between bee health and production, the negative effects of environmental xenobiotics and climate change, this field must be considered as an interdisciplinary research issue. Moreover, honeybee veterinary medicine is increasingly engaged in the One Health approach, due to the possibility that the poor health of honeybee colonies affects human life. This review identified the key veterinarian roles, gaps in their higher education curriculum, as well as the necessity for research linkage between expectations and professional perspectives.Pčelarstvo je važan sektor gospodarstva koji se suočava sa zdravstvenom krizom. Zajednice medonosne pčele, kao i populacije drugih kukaca oprašivača se smanjuju posljednjih desetljeća. Bolesti se smatraju jednim od glavnih uzroka gubitaka u pčelarstvu. Kako bi se suočili s tim problemom potrebno je povoditi veterinarski nadzor, kontroliranje, suzbijanje i preveniranje bolesti pčela uključivanjem javnih i privatnih veterinarskih organizacija na području njihova djelovanja i u bliskoj suradnji s pčelarima i poljoprivrednicima. Nužno je potrebno osvijestiti aktualnu problematiku i ugroženost pčelarstva u javnozdravstvenom sektoru. Zbog mogućih negativnih učinaka ksenobiotika iz okoliša i klimatskih promjena na zdravlje i proizvodnju pčelinjih zajednica ovo područje zahtjeva provedbu intradisciplinarnih istraživanja. Štoviše, veterinarska medicina u području zdravlja zajednica medonosne pčele zauzima iznimno važan pristup Jednog zdravlja upravo zbog mogućnosti da narušeno zdravlje pčelinjih zajednica može negativno utjecati na zdravlje ljudi. U ovom radu istaknute su glavne uloge veterinara u pčelarstvu, nedostatci u kurikulima studijskih programa veterinarske medicine visokoobrazovnih ustanova i nužnosti provedbe istraživanja koja povezuju očekivanja i stručne perspektive

Monitoring of Small Hive Beetle (Aethina Tumida Murray) in Calabria (Italy) from 2014 to 2016: Practical Identification Methods

Abstract The Small Hive Beetle (SHB), Aethina tumida, is an invasive pest of honey bee colonies that causes significant damage to the beekeeping sector. SHB was detected in southern Italy (EU) in 2014 and despite adopted eradication measures, is still present there. After three years of observations of SHB in Calabria (2014-2016), we provide here some practical tips for improving control measures. A new time-saving colony examination method, including the use of an internal divider reduced the time needed for hive inspections by 31.86 % on average. Prioritizating the inspection of pollen and honey combs rather than brood combs is advised. Sentinel apiaries with no more than five colonies without supers are suggested for each beekeeping location in order to attract and to monitor the early appearance of SHB. The use of these methods will enable early detection and prompt control measures application before this destructive pest can spread in the region

Conducting an International, Exploratory Survey to Collect Data on Honey Bee Disease Management and Control

The Istituto Zooprofilattico Sperimentale del Lazio e della Toscana (IZSLT) and the International Federation of Beekeepers' Associations (Apimondia) set up a worldwide survey in 2015–2017 to gather information on beekeepers' perceptions concerning good beekeeping practices, the main honey bee diseases, and the technical assistance they receive. The on-line dissemination of the survey was facilitated by the "Technologies and Practices for Small Agricultural Producers" platform (TECA) of the Food and Agriculture Organization of the United Nations (FAO). In total, 248 questionnaires were received from the European region and the results are reported here. Varroosis remains the biggest concern and is the most important reason for beekeepers' use of veterinary medicines. However, a sustainable approach to managing Varroa was detected. American foulbrood (AFB) and European foulbrood (EFB) infections are mainly managed through the shook swarm technique or burning the hives. Concerning technical assistance for disease management, beekeepers were mainly supported by their associations or expert beekeepers. Relevant data were collected and analyzed but information from many low-income countries in Africa or Asia is still missing, and more efforts are needed to fill the knowledge gaps

An inertizing and cooling process for grapes cryomaceration

Background: With this research an inertizing and cooling process for grapes cryomaceration has been set up. The process in question has been performed by an innovative plant that cooled the grapes rapidly in about 8 sec until they reached the set cryo-maceration temperature, using direct injection of liquid CO2. It works with a grape flow of approximately 2-3 tons/h, with a maximum thermal gradient of 20 K between the grape inlet and outlet temperature. For this plant a vibrating device was set up that allowed that only one grape cluster layer to be formed on the ribbon conveyor after the grapes had been put into the feedbox. A numerical model was set up for the cooling tunnel, and numerical simulations were performed to investigate the operative parameters of the machine in question. The numerical results were validated by means of experimental tests. Results: The wines obtained by using the considered plant (IW) were chemically analysed, and a comparison was performed with wines obtained with the same grape without the use of the plant (TW). All phenolic parameters were higher in IW wines, while other substances such as alcohol, reducing sugars, acids, and volatile acidity were less affected by the different winemaking technique. A deeper yellow colour was a direct consequence of the higher phenolic content of IW wines. Panelists preferred the IW wines, which had a richer, more delicate aroma. Conclusions: The study showed that careful exclusion of air combined with preventing oxidation during the cooling process, that is realized with the considered innovative cooling plant, effectively yields pleasing wines with more character

Advantages and Requirements in Time Resolving Tracking for Astroparticle Experiments in Space

A large-area, solid-state detector with single-hit precision timing measurement will enable several breakthrough experimental advances for the direct measurement of particles in space. Silicon microstrip detectors are the most promising candidate technology to instrument the large areas of the next-generation astroparticle space borne detectors that could meet the limitations on power consumption required by operations in space. We overview the novel experimental opportunities that could be enabled by the introduction of the timing measurement, concurrent with the accurate spatial and charge measurement, in Silicon microstrip tracking detectors, and we discuss the technological solutions and their readiness to enable the operations of large-area Silicon microstrip timing detectors in space

Honey vs. Mite—a trade-off strategy by applying summer brood interruption for Varroa destructor control in the Mediterranean region

Ectoparasitic mite Varroa destructor with its associated viruses is a common global threat to the health of honey bee colonies. If colonies are not treated, the vast majority die in a 3-year period. Existing acaricides used for treatment are becoming less effective, and new approaches to honey bee protection are required. A reliable method is to create a broodless condition in a colony by preventing the queen from laying eggs, and after 25 days all mites will be exposed to the treatment with organic acids or essential oils. The focus of our study, performed on 178 colonies in six Mediterranean countries, was to compare different periods of queen caging on honey production, colony development, and the effect of treatment. Queen caging had no negative effect on colony strength before the wintering period, while it affected honey production; colonies in which queens were caged two weeks before the main summer nectar flow produced significantly less honey. However, tested colonies ten weeks after the treatment had significantly lower infestation with V. destructor mites. This study shows that caging the queen with subsequent oxalic acid treatment 25 days after caging is an efficient method to control V. destructor infestation, while the starting point of queen caging in relation to the main summer nectar flow affects honey production

Sustainable development in circular agriculture: An illustrative bee↺legume↺poultry example

publishedVersio

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

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