Farm Forestry New Zealand
PESTS AND DISEASES OF FORESTRY IN NEW ZEALAND
Bugs on the move- the harlequin ladybird
Scion is the leading provider of forest-related knowledge in New Zealand
Formerly known as the Forest Research Institute, Scion has been a leader in research relating to forest health for over 50 years. The Rotorua-based Crown Research Institute continues to provide science that will protect all forests from damage caused by insect pests, pathogens and weeds. The information presented below arises from these research activities.
From Forest Health News 276, October 2017.
The harlequin ladybird (Harmonia axyridis) was first recorded in New Zealand in Auckland during 2016. This globally invasive insect is spreading quite rapidly in its new home, with findings of large clusters in things such as outboard motors and beehives (Waikato), as well as car engine compartments (Bay of Plenty). We expect this species will show up in a number of new locations this summer. At present, the southernmost report is on the Scion grounds in Rotorua, but there have also been unsubstantiated reports from the Wairarapa region.
This large ladybird is well known overseas for outcompeting native ladybirds that feed on aphids or similar prey, and being a nuisance to humans by clustering in large numbers in homes. It can even taint wine by clustering in grape bunches at harvest. Again, the editors are interested in any observations of this species north of Auckland and south of Rotorua. We remind readers it is illegal to purposely spread this ladybird. For more information on the ladybird see: http://www.mpi.govt.nz/ document-vault/12261
Andrew Pugh
This information is intended for general interest only. It is not intended to be a substitute for specific specialist advice on any matter and should not be relied on for that purpose. Scion will not be liable for any direct, indirect, incidental, special, consequential or exemplary damages, loss of profits, or any other intangible losses that result from using the information provided on this site.
(Scion is the trading name of the New Zealand Forest Research Institute Limited.)
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