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Kiwifruit's most unwanted

Kiwifruit's most unwanted

There are eight organisms identified as the biggest biosecurity threat to New Zealand's kiwifruit industry.

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 Kiwifruit's most unwanted

Kiwifruit's most unwanted

Spotted Lanternfly

The Spotted Lanternfly (SLF) is an emerging biosecurity threat to kiwifruit and many other horticultural industries. The pest is hard to control and is a proven invader, capable of flying and hitchhiking on inanimate objects.

SLF attacks over 70 host species, including kiwifruit, grapes, stonefruit and pipfruit. It's preferred host is Tree of Heaven, which is present in New Zealand and considered an invasive weed.

Adults and nymphs feed on young stems and bark tissue with their piercing and sucking mouthparts and excrete large amounts of sticky liquid called honeydew. Extensive feeding results in oozing wounds on trunks, wilting and death of branches. It could severely impact the kiwifruit industry through the sooty mould left on fruit, which renders the fruit unmarketable.

Threat Levels
Likelihood of entry
Low
Likelihood of establishment
High
Production impacts
High
Market access impacts
Low

Pest ranking based on the KVH risk matrix

View risk matrix

Native to Asia, SLF has invaded North America, where it's numbers have grown rapidly. It is thought to have entered as egg masses on landscaping stone from China and eradication attempts have been unsuccessful. The impacts of SLF have been described as worse than Brown Marmorated Stink Bug (BMSB).

How could it get to New Zealand? The SLF lays its eggs in clusters on smooth surfaces (including vehicles and machinery, shipping containers, and garden furniture) and covers them with a protective layer of wax.

The eggs can then hitchhike on these and other commodities imported into New Zealand. The egg masses are difficult to see and hard to treat with insecticide - see images below of egg masses on kiwifruit and tree bark.


Further SLF Resources

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LATEST NEWS

21 Feb 2025

Auckland fruit fly – controls on produce movements now in place

Legal controls on the movement of fruit and vegetables are now in place in the Auckland suburb of Birkdale and nearby areas on the North Shore following the detection of a single male Oriental fruit fly. The horticulture pest was found in one of Biosecurity New Zealand’s national surveillance traps which are placed in fruit trees in residential back yards. Other traps in the area checked in recent days have showed no signs of other flies and initial investigations have found no other signs to date. Biosecurity New Zealand staff have been busy in the area today laying more traps and giving out information to households. Around 100 additional traps which specifically target oriental fruit fly are being placed within a 1500m area of the original find. You can find a detailed map of the controlled area and a full description of the boundaries and rules in place here. The controlled area has two zones – A and B. Zone A is a 200m zone. Zone B covers a 1500m area. No whole fresh fruit and vegetables, except for leafy vegetables and soil free root vegetables, can be moved outside Zone A. This applies to all produce, regardless of whether it was bought or grown. All fruit and vegetables grown within Zone B cannot be moved out of the controlled area. These legal controls are an important precaution. Should there be any more flies out there, this will help prevent their spread out of the area. It is likely the restrictions will be in place for at least two weeks. KVH is working closely with Biosecurity New Zealand and other horticultural Government Industry Agreement (GIA) partners on these actions to minimise the risk to kiwifruit growers. While it's disappointing to detect another Oriental fruit fly so soon after closing the previous response in Papatoetoe, the latest find highlights the value of trapping and surveillance efforts, which members of the kiwifruit growing community fully support. Biosecurity New Zealand website for detailed movement restriction information and fact sheets. KVH Oriental fruit fly fact sheet. KVH Oriental fruit fly identification guide.

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20 Feb 2025

Biosecurity New Zealand investigating and boosting trapping after new Auckland fruit fly find

A biosecurity operation is under way and extra field teams are today in the suburb of Birkdale, on Auckland’s North Shore, after the find of a single male Oriental fruit fly in a surveillance trap in a suburban backyard. This is the same species of fruit fly that we responded to in Papatoetoe recently, but it is too early to say whether the two finds are linked. Further DNA analysis of the fly will take place over the coming days. With this latest detection, activities are moving quickly to look for any other flies and eradicate them. Biosecurity New Zealand are ramping up trapping and inspection, with daily checks in a 200-metre zone from the original find and checks every three days in a second zone out to 1500m. The capture of a single male does not mean we have a breeding population. However, while checks are underway for other fruit flies, the community is being asked to help prevent any possible spread. As a precautionary measure, legal restrictions will be put in place on the movement of fruit and vegetables out of the area where the fruit fly was found. Instructions about these controls and the exact area affected will be issued tomorrow (Friday). Response staff will be out tomorrow providing people with information. KVH is working closely with Biosecurity New Zealand and other horticultural Government Industry Agreement (GIA) partners on these actions to minimise the risk to kiwifruit growers. There have been 13 incursions of different fruit fly in Auckland and Northland since 1996 and all have been successfully eradicated. Read more about Oriental fruit flies here – including images. We will provide further updates and information as our response actions continue.

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13 Feb 2025

Auckland fruit fly controls lifted

Controls on the movement of fruit and vegetables in the Auckland suburb of Papatoetoe have been lifted after no further evidence of the Oriental fruit fly was found in the area. The decision to end the operation follows more than a month of intensive fruit fly trapping and inspections of hundreds of kilograms of fruit. Residents and businesses in the affected area have supported the movement controls, keeping an eye out for fruit flies and safely disposing of fruit in provided bins – vital to helping protect the kiwifruit industry and wider horticultural sector. Biosecurity New Zealand quickly placed legal controls on the movement of fruit and vegetables in an area of Papatoetoe on 4 January after a single male Oriental fruit fly was identified from a national surveillance trap. No further adult fruit flies, eggs, larvae, or pupae have been found. With no further detections over six weeks, the response governance group (including Biosecurity New Zealand and KVH, alongside other horticulture industry groups) is confident the Controlled Area Notice restrictions can be lifted and response operations closed. The checking of 7800 fruit fly traps around the country, including some 200 traps in the Papatoetoe/Māngere area, will continue as normal. KVH thanks the great work of our industry partners APAC and Punchbowl for their assistance in response activities - by working together, and responding quickly, we have managed this situation well and limited impacts to our industry and growers. Key figures: More than 1500 visits made to check the 109 fruit fly response traps in Papatoetoe/Māngere. Over 600 biosecurity bins distributed within the community to collect produce waste for safe disposal. More than 470 kilos of fruit cut up and examined for any signs of fruit fly eggs or larvae. More than 150 staff involved throughout the response, and kiwifruit industry personnel from KVH, APAC and Punchbowl. Read more about the detection and activities that lead to this successful outcome on our website here.

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