Deformed Wing Virus

Deformed Wing Virus

Deformed Wing Virus

Pest and disease search

Deformed wing virus has been detected overseas in healthy and diseased hives. It can exist in latent form in hives with no ill-effects. Clinical signs can become apparent when a hive is under stress, such as the presence of another disease, a parasite (it has a strong association with Varroa destructor), or when protein food sources are in short supply.

A bee showing the classic symptoms of stunted wings soon dies. Other infected bees can appear normal but have a shortened lifespan and are less productive. If a bee is infected as an adult it appears normal.

The signs of deformed wing virus has been observed in hives in New Zealand previously, but the diagnosis has only recently been confirmed by improved testing methods.

Impacts

Deformed wing virus has no impact in its latent form, but becomes apparent in stressed or declining hives. It can mean bees are malformed and die, or are less productive than unaffected bees. Impacts can be managed by ensuring that varroa is well controlled and hives are well nourished.

Distribution

Currently, two properties, one in Northland and one in the Waikato are known to be affected.

Management

Biosecurity New Zealand currently assessing actions to help beekeepers manage this disease without unduly affecting their business.

Page last updated: 19 June 2008