In accordance with the national lock-down response to Covid-19, our operations are significantly reduced and our office will be closed to all visitors from 5 pm, 25th March until further notice. Following guidance from MBIE, MPI and transport providers, we are able to provide a very limited operation for essential services only:

  • Commercial apiarists
  • Farmers and growers, where high wasp populations are affecting their work
  • Approved biosecurity operations
  • Professional pest control providers

Ordering Vespex is generally not appropriate in a situation where you have discovered a wasp nest in your backyard or house. In these situations please call a commercial pest controller (who are able to respond to health hazards during the lockdown period) and will be able to apply direct control methods.

Our ability to supply Vespex to essential services in North Island locations is also further reduced due to additional restrictions with shipping of hazardous substances across Cook Strait from our office in Nelson. We will only be shipping on Mondays, and there will be no shipments on the week of 13th April (Easter Monday).

We are able to continue processing Vespex Approved User registrations, but this may take a little more time than usual. This is a difficult time to operate, so please be patient.

We wish all our customers and their families the very best for the challenging time ahead.


Merchento are the proud manufacturers and suppliers of Vespex® ‒ a significant advance in wasp control. Our product range is set to increase, with some exciting new and innovative product developments underway, so make sure to check back from time-to-time.

Go to Vespex wasp bait page

Click on the wasp logo to go straight to Vespex® page


Book Offer!

For everyone wanting something to read over the summer holidays or wanting to learn more about wasps and the problems they cause in New Zealand, we are delighted to offer The Vulgar Wasp by Phil Lester of Victoria University at a discounted rate of $25.00

A riveting account of an extraordinary animal. Lester engages readers in the biological complexities and wide-ranging impacts of a “scary” wasp as an excellent example of controversies swirling around biological invasions.’ — Daniel Simberloff, Professor of Environmental Studies at the University of Tennessee and author of Invasive Species: What Everyone Needs to Know.

Cover photo by Colin McDiarmid



Wasp Wipeout Reloaded for 2020

Wasp Wipeout is now heading in to its fourth season, with additional sites in the South Island, but also some in the North Island as well. This is a fantastic initiative between Stuff and Department of Conservation and adds significantly to the land area where Vespula wasps are being controlled.

Read more about the new Wasp Wipeout project HERE.





The shipping regulations regarding all material classed as dangerous goods means it has become increasingly difficult to ship Vespex® to the North Island. This adds at least 24 hours to delivery times. In addition to this, we have begun to experience issues with some Courier Post drivers refusing to carry items classed as dangerous goods (DGs) to rural addresses, but we are unable to determine in advance which rural addresses might be affected. Even if a rural delivery service will take DGs, it will add an additional 24-48 hours to delivery times. The combined effect of this situation is that we cannot deliver Vespex® to any North Island address classed as rural by our courier service provider. If you know your home address is likely to be rural, please provide an alternative delivery address in town (e.g. a relative's house or a store you have a working relationship with). Alternatively, please contact us and we will provide the address of your nearest Fastway agent.





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Phone   +64 3 539 0508