KVH recently received some striking images from a Gisborne contact showing an unusual cluster of small, golden, striped eggs scattered across the underside of a kiwifruit (Hayward) leaf.

Following review by Bioeconomy Science Institute (BSI) entomologists, they were identified as native stink bug (pentatomid) eggs.

Of particular interest was distinctive dark banding visible on many of the eggs - a strong indicator they were parasitised by the “native shield-bug egg parasitoid” which are tiny wasps less than two mm long.

While pentatomid eggs are often laid in neat, raft-like clusters, they can also appear more loosely arranged as seen in these images. In this case the egg shape and surface features were the key diagnostic characteristics supporting identification, with the banding providing added confidence that parasitism had already occurred. Observations like these add to our knowledge of native egg parasitoid species.

A BSI three-year project which looked for natural enemies of shield bugs already present in New Zealand has recently identified two undescribed parasitoid species.

Growers and orchard staff finding unusual egg masses or insect life on leaves are asked to note the location and host plant and send through clear photos to KVH. A handy reporting guide is available here. If possible, also retain leaf samples with eggs in a sealed plastic bag and keep them cool as finds can then be sent for identification if required.

Thanks to everyone who has shared observations of unusual pests and vine symptoms with KVH this year. Every report helps strengthen our biosecurity and orchard knowledge.