iManagement

Platform for beekeeping practice and know-how

Depiction:

The European honey bee, also known as the honey fly (Apis mellifera), is a domesticated honey bee species native to Europe. It is considered semi-domesticated. It is one of the bee species bred on a large scale for honey production.

There are many methods of queen rearing. All of them are based on the same principles. Every beekeeper knows that, outside the swarming period, a colony with a queen will not accept the rearing of additional queens without specific precautions (in general, the presence of the queen prevents or destroys any queen rearing). Queen-rearing techniques consist in the practical implementation of these “precautions”.

The garden aster is a perennial herbaceous plant reaching 90–150 cm in height and flowering from August to November. Native to North America, Aster novi-belgii was introduced to Europe in the 18th century as an ornamental plant. Having escaped cultivation, it now grows spontaneously in many places, preferably on rather calcareous soils: in gardens, meadows and moist woodlands.

Varroosis promotes drifting, a mechanism explained by the fact that bees from heavily infested colonies lose the specificity of their cuticular chemical profile as well as the accuracy of their orientation. What can we learn from wild colonies?

Varroa destructor, a killing machine!

The many scientific articles available to beekeepers make it possible to understand the physiology of bees, drones and, of course, varroa. However, it is essential to grasp the relationships between these different actors within the hive and over the course of the months, that is, the pathophysiology of these three populations. Joseph Létondal provides a comprehensive perspective, and the curves in his diagrams allow potential varroa-related problems to be anticipated before it is too late. This video is very rich in a wide range of practical information.

When a beekeeper looks at the head of his bees and sees the two large, immobile compound eyes positioned on either side of the head, as well as the three ocelli located on the forehead or vertex, he inevitably asks himself the question: with these two large eyes, can my bees see the same things as I do, or do they perceive the world differently? And why are there additional eyes on the head?

It has become clear that honey bees can develop several strategies to reduce infestation by Varroa. This has been demonstrated both in untreated wild colonies and in selected colonies (such as bees exhibiting the VSH behaviour of the USDA in Bâton-Rouge). Resistance strategies can be classified into two types: those associated with the brood and those associated with the period during which Varroa is present on adult bees.

Neonicotinoids are extremely ecotoxic pesticides. By infiltrating all environmental compartments, they indiscriminately kill both vertebrates and invertebrates. Despite their ban in 2018, traces of these substances persist in the environment at lethal concentrations.

What qualities are required to be a good beekeeper? They are numerous, as beekeeping draws on a wide range of techniques and fields. Some are present from the outset, while others are acquired over time.

Horizontal or creeping cotoneaster (Cotoneaster horizontalis) is a shrub native to China that was introduced to Europe at the end of the 19th century. For a long time, it remained confined to parks and gardens, where it is appreciated for forming a dense ground cover that blankets rock gardens and stabilises slopes.

Although substantial research has been conducted on the causes of colony collapse disorder in the European honey bee Apis mellifera, there has been increasing evidence over the past two decades that another pandemic affecting both domesticated and native bees is emerging. This pandemic is the result of the spread of fungal pathogens of the genus Nosema.

by ALAIN SATABIN

As early as Antiquity, mathematicians observed that the shape of honeycomb cells in beehives optimizes the ratio between available volume and the amount of wax used. Demonstrating this, however, is another matter … one that has still not been fully resolved.

It sticks, it stains, and we sometimes curse it when inspecting our beehives; yet it gives beekeeping one of the fragrances that contribute to its charm and is also an increasingly sought-after product, representing a growing source of income for beekeepers. Although omnipresent in our hives, propolis is the result of a harvest and a processing effort that is anything but simple for the bee. A demanding but indispensable task; for this resinous substance, whose medicinal properties have been appreciated since Antiquity, fulfils multiple functions within the colony.

by ELIZABETH TIBBETTS AND ADRIAN DYER

Recognizing the facial features of conspecifics does not require a brain as complex as one might imagine: some insects, notably bees, are remarkably adept at this.

The art of economy (Janine Kevits)

Winter represents a formidable challenge for fauna, as it must cope both with cold temperatures and with food scarcity. Some insects have “chosen” to avoid it by migrating to warmer regions; this is the case, for example, of the painted lady butterfly. Others concentrate their chances of survival on a few individuals—reproductives that are abundantly nourished during the favorable season and whose task is to found a new colony on their own the following spring; this is the strategy of wasps, hornets, and other solitary bees. The honey bee, by contrast, has found a different path: it is the powerful organization of the colonies it forms that enables it to meet this challenge, by implementing two means that are entirely original in the insect world—on the one hand, the storage of reserves, and on the other, the reorganization of the colony to form the winter cluster, a system characterized by the absence of brood and by modes of functioning that differ fundamentally from those of the summer colony.

The adaptive strategies of imitation make mimicry a model of a complex coevolutionary mechanism involving a first species acting as a model (e.g. Apis cerana) and a second, imitating species (e.g. Varroa destructor), very often parasitic. Varroa destructor, a parasitic mite of bees, has the ability to mimic the chemical composition of its host’s cuticle; moreover, it is also capable of modifying this composition according to the species it parasitizes.

The creation, as early as spring, of several nucleus colonies from a small six-frame colony is highly profitable and straightforward, provided that the beekeeper monitors the development of the parent colony, transfers the brood frames onto two stacked boxes, and that frequent syrup feeding stimulates a particularly prolific queen.

Regular inspection of colonies makes it possible to identify potential health problems at an early stage and to implement planned and targeted measures. It is essential to check and assess colonies at least in spring (when grape hyacinths are in bloom), in summer (between the summer honey harvest and the first summer treatment), and in October (before overwintering).

The economic benefit for beekeeping operations of removing drone brood as a complementary measure
to control varroa

Since the first article, we have received a large number of requests for clarification regarding the practical implementation
in the hive, followed by many very positive comments on the effects of this “mechanical treatment,” which poses no risk to bees or the queen. After recalling the context of the study and the way it was conducted, we now present the complete results over a two-year period.

The expression may come as a surprise and calls for some clarification. “Insemination with a single male” refers to the insemination of a queen using the semen of a single drone, instead of the 12 to 20 males involved in natural mating or conventional instrumental insemination. This article presents this specific technique and its contexts of use. An overview of our current knowledge regarding the benefits and the present limitations of this technique!

Communication in bees is highly elaborate and has been the subject of numerous studies. There is, of course, the well-known “waggle dance” or “figure-eight dance,” but what is less well known is that this dance serves solely to indicate the location of a food source. While dancing, the bee releases chemical messengers that recruit other foragers and inform them about the type and richness of the source. Communication therefore indeed relies on the exchange of chemical substances known as pheromones.