Rangiuru grower Ron Bailey had installed security lights and cameras to deter thieves from his orchard.
Bailey was aware of thefts "usually around the Katikati area, which seems to be more vulnerable".
New Zealand Avocado chief executive Jen Scoular said the association was aware of recent thefts from "multiple Bay of Plenty avocado orchards" and warned growers to review their security.
"The financial cost to growers can be significant and avocado theft also has serious impacts on grower safety."
Scoular said all avocados harvested in New Zealand were clipped, leaving a small stalk "button".
"If the avocado stalk looks very long, or if there is a hole where the stalk should be, it is possible the avocados have been stolen."
Police advice
If anyone spots suspicious behaviour or vehicles hanging around orchards, they should call their police station. Orchardists should consider reinforcing shelter belts with fencing, sensor lights, and concealed trail cameras. Advise neighbours when you're absent to keep watch over the property. If anyone is offered a significant amount of avocados from an unofficial source at a heavily discounted price, they should report it to police.
Source - New Zealand Police