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Unwanted!
22 February 2018

Each month we profile one of the 12 most unwanted pests featured on our ‘Port of Tauranga – committed to biosecurity excellence’ calendar. They could all potentially enter our borders and have a major impact on the local community and businesses, the kiwifruit industry or other local growers.

This month, the focus is on Spotted Wing Drosophila (SWD). This pest is a threat to fruit crops in every country it has established in, resulting in major economic costs due to control, crop destruction and market access implications.



SWD has a wide range of hosts, including kiwiberries. There is no evidence of impacts to kiwifruit, but market access implications are possible should we have an incursion.  Unlike most other vinegar flies - which attack damaged or rotting fruit - the SWD lays its eggs in ripening fruit, leaving it soft and unmarketable. 

Adults thrive in temperatures up to 25 degrees, making New Zealand a suitable climate for establishment.

This pest is mobile and can fly between local areas, but fresh produce is the most likely long-distance pathway. Read more
here.

Everyone can play a part in keeping unwanted pests and diseases out of New Zealand. If you come across anything unusual, catch it, snap it, and report it to the Ministry for Primary Industries (MPI) on 0800 80 99 66.

Kiwifruit Vine Health

25 Miro St
Mount Maunganui
Tauranga 3116

Tel:  0800 665 825
Fax: 07 574 7591

Email: info@kvh.org.nz