Bee Health

Asian Hornet

Asian_hornet_(Vespa_velutina).jpg

Asian Hornet

Introduction

The Asian hornet, Vespa velutina, originates from Southeast Asia and is thought to have arrived in France (from China) in 2004, before spreading rapidly through France and Western Europe. V. velutina is a highly aggressive and effective predator of honey bee colonies, responsible for devastating losses.

Identifying the Asian Hornet

Slightly smaller than the European hornet, Vespa velutina has characteristic yellow legs, a dark velvety thorax and a dark abdomen with a distinctive yellow band on the fourth segment. Queens can be 30 – 35 mm long while workers are slightly shorter, at up to 25 mm long. The head appears dark from above and orange from the front, with dark coloured antennae. The Asian hornet can typically be seen hovering (‘hawking’) outside a honey bee colony, waiting to attack returning foragers.

How Asian Hornet Spreads

The most likely introduction pathway for V. velutina is accidental via trading activities. The fact that the fertilised queens can survive long periods of time hibernating makes it an ideal candidate for long distance transport in shipments of goods, for example in containers, in pots, in building material, under the bark of trees, in decorative material or wooden items or in cards, boxes, trucks, farming equipment, etc.

Only one mated queen is needed to start a new colony and initiate further spread of the species; the French population originated from a single queen. In France, V. velutina spread to cover 120,000 km² within 3 years, demonstrating that it can colonise large areas in a very short period of time if the climatic conditions are favourable.

Asian Hornet Control

Total eradication is generally considered impossible, but management plans can target the Asian hornet at different life cycles, and can include nest destruction, trapping of workers and queens, reproductive control and biological control.

Nest destruction must not take place during the day or returning hornets will simply set up new nests in the vicinity, making the problem worse.

Vita’s ApiShield trap is unique in trapping hornet workers and queens by using the bee colony as bait, thus requiring no chemicals or other attractants. The ApiShield trap is selective to predators of honey bees, easy to use and low maintenance. Importantly, by trapping hornet queens, invasive spread is inhibited.

How to Report Suspected Sightings

In the UK, if you think you have found an Asian hornet, please notify the Great British Non Native Species Secretariat alert email address at alertnonnative@ceh.ac.uk immediately. Additionally, you can report sightings on their website: http://bit.ly/non-native.