Preventing Future Pest Incursions

The current Darwin’s ant invasion has got me thinking about risks and risk mitigation.

With regard to keeping our environment on Rakino free of undesirable fauna, the risks of pests getting to the island are high, and the consequences are severe. The costs of the rainbow skink incursion were in the tens of thousands, and we can only cross our fingers and hope that the Darwin’s ant incursion can be dealt with swiftly.

I don’t know how the ants got to Rakino, but there is one vector we can eliminate. I know from experience when I have brought plants from Auckland to Rakino that Belaire is assiduous in checking they have been dealt with according to protocol in order to stop spread of Rainbow Skinks and Argentine Ants. I’m so paranoid about being ‘that guy’, that I soak my plants in buckets for two days solid before taking them to our island. Often the bio-security staff are down at the pier with the sniffer dogs too, which is excellent. All commercial transport operators moving goods or people to or among Hauraki Gulf islands will need to have a Pest Free Warrant also, which is a further protection.

The weak link is people with private boats who may not be aware of the protocols around moving plants from the Mainland to pest-free islands.

I’m proposing that we utilise the already excellent existing Rakino Nursery further; talking with John MacKenzie about the native plants we’d like to be planting, seeing if the range can be expanded even further. John does his best to eco-source seed for propagation, and the nursery has expanded recently, which means more trees grown on island, so no risk of incursions.

Of course, people also want to plant exotics, annual flowers, vegetables, herbs, and fruit trees, so these are also possible vectors of pest transmission if they are being transported to Rakino.

What do the gardeners think about having a couple of plant/seed buy, sell or swaps a year? Cuttings are easily taken from many of the pretty exotics that birds love on the island. I’m particularly thinking of the callistemons (bottlebrush) which are a magnet for bellbird and tui. They also pose a risk because of myrtle rust, and along with pohutukawa should not be transported to Rakino. We have to protect our big old pohutukawa as best we can. I’ve also got my eye on a number of beaut hibiscus that I’m keen to get cuttings from.. Seed collection is very easy with regard to annual flowers, and commercial seed packets are completely safe, of course. It could be a great theme for a market day.

Next year Rakino is 20 years pest free, so it’s unfortunate timing for the ant incursion. We are incredibly privileged to inhabit an island that is free of predators. It’s actually very rare internationally, and we shouldn’t take that status for granted. I suggest we come up with a framework to stop further incursions, and take responsibility to stop the potential risks ourselves.

I’d love some feedback, and further thoughts about this. 🙂