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Harlequin ladybirds a threat to New Zealand horticulture

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Apr 06, 2018 - Infestations of Harlequin ladybirds in the Gisborne district could pose a threat to the horticulture and viticulture industries. The invasive species from Asia was first reported to the Ministry of Primary Industries in Auckland in 2016 and has since been found in the Waikato, Bay of Plenty and Taranaki regions. It has also been discovered at Te Karaka and in the Matokitoki Valley.

Harlequin ladybirds are a potential threat to the horticulture industry, as they feed on top fruit, causing blemishes on the fruit. They are known to cluster within bunches of grapes before harvest, resulting in tainted juice.

Gisborneherald.co.nz reports that Harlequin ladybirds also pose a nuisance to humans. They swarm in buildings and houses. They can bite and cause allergic reactions. They eat other insect species and compete for food resources, posing a risk to the biodiversity of the ecosystem. They will eat native ladybirds and also swarm in beehives over winter, requiring manual removal.

 

| A FreshPlaza release  |  ||  April 06, 2018   |||

 

 

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Published in HORTICULTURE
Tagged under
  • Horticulture
  • news talk

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