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Pachyanthidium species. ©Bernhard Jacobi
Pachyanthidium species. ©Bernhard Jacobi
Pachyanthidium species. ©Bernhard Jacobi
Pachyanthidium aurense (female) - pinned specimen. Photo: Connal Eardley
Pachyanthidium aurense (male) - pinned specimen. Photo: Connal Eardley
Honey bees are not the only bee species that are significant for human wellbeing. Pachyanthidium bees are a group of native bee species that do not produce honey but are likely to be important pollinators of crops and wild plants. Females have a sting, but they are not aggressive and will only sting if handled. Pachyanthidium bees nest in natural cavities and live independently of other bees (i.e. they are solitary). They have long tongues which allow them to feed on deep as well as shallow flowers. This fact sheet provides information about these bees to encourage farmers to understand and protect them to help ensure that their crops are effectively pollinated.
From a conservation and agricultural standpoint it is not necessary to recognise all the different bee genera. However, it is important to know that there is a large bee biodiversity. Different bee genera pollinate different plant species, although there is some overlap that acts as a buffer as bee populations wax and wane. For healthy ecosystems, including agro-ecosystems both diversity and abundance in the bee fauna is important.
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Megachilidae
Subfamily: Megachilinae
Tribe: Anthidiini
Genus: Pachyanthidium Friese, 1905
The genus Pachyanthidium is a group of solitary bees in with about 20 species described worldwide. They are likely to occur throughout Africa.
Five described species have been recorded in
Pachyanthidium bees are not well known by local people (including farmers) in
Some insect species can be mistaken for Pachyanthidium bees. These include other bee species in the tribe Anthidiini (which includes Pachyanthidium and Afranthidium bees ). They can be distinguished by microscopic characteristics that are described in the key that accompany these fact sheets. Afranthidium bees can also be confused with some flies and wasps. Flies are different in that they have large eyes and two wings while bees have smaller eyes and four wings. In addition, most flies that may be confused with these bees do not collect pollen from flowers. Wasps have a constriction (“waist�?) at the junction of their abdomen and thorax which is absent in bees.
Pachyanthidium bees are found in most districts/regions of
Pachyanthidium bees can be found in various habitats (land-uses) in East Africa such as grasslands, natural forests, marshlands, protected areas, farmlands, rangelands, woodlands, woodlots (forest plantations), along river edges (riparian areas) and in coastal areas. In
Pachyanthidium bees live independently of others (i.e. they are solitary). Pachyanthidium bees build their nests in sheltered locations in pre-existing natural cavities such as burrows, crevices and hollow twigs that can be found in less disturbed and dry habitats.
Pachyanthidium bees visit a variety of flowering crop species belonging to different plant families in
Pachyanthidium bees occurring in
Little information exists on the usefulness of these bees to the lives of the people in
In
There are now concerted research efforts in the region to develop best practices for conservation and management of bees to enhance crop production. Theoretically, bee conservation and management is inexpensive and adopted activities can also improve the aesthetic value of the landscape. Such practices involve setting land aside (e.g. a 1-metre strip) in the farmland to host all year round food resources for the bees, as well as safer sites for nesting, mating, resting and refuge from natural enemies. During flowering, farmers should manage pesticide usage carefully to avoid poisoning flower-visiting bees. Farmers should also minimise pesticide drift from the field to adjacent areas. Laws governing registration and use of plant protection products also indirectly play a major role in the protection of pollinators. KARI (the Kenya Agricultural Research Institute) is developing protocols for mass rearing of different species of solitary bees. Any successful results from this research will be freely communicated to the public. In addition, KARI is collaborating with other stakeholders to ensure in situ conservation and management of bees for pollination purposes. Much of the work of conserving native bees will be underpinned by raising public awareness of the importance of these species.
There is not yet any legislation in
1. Eardley CD, Gikungu MW and Schwarz MP (2009) Bee conservation in Sub-Saharan Africa and
2. Eardley CD, Kuhlmann M and Pauly A. (2010) The Bee Genera and Subgenera of sub-Saharan
3. Eardley CD and Urban R (2010) Catalogue of Afrotropical bees (Hymenoptera: Apoidea: Apiformes). Zootaxa, 2455: 1–548.
4. Michener CD (2007) The Bees of the world, the John Hopkins University Press,
Théodore Munyuli, Busitema University - Uganda; Muo Kasina, Kenya Agricultural Research Institute (KARI) - Kenya; Juma Lossini, Tropical Pesticides Research Institute (TPRI) – Tanzania; John Mauremootoo, BioNET-INTERNATIONAL Secretariat – UK; Connal Eardley, Plant Protection Research Institute (PPRI) – South Africa.
We recognise the support from the Kenya Agricultural Research Institute (KARI), Tropical Pesticide Research Institute (TPRI) –
BioNET-EAFRINET regional coordinator: [email protected]