Aphids are pests of brassica crops throughout NZ, but occur more...

Aphids are pests of brassica crops throughout NZ, but occur more frequently in the South Island. They cause damage to plants by sucking plant juices and are also a vector for a number of plant viruses.

Diamondback moth (DM) occurs throughout NZ, often in association...

Diamondback moth (DM) occurs throughout NZ, often in association with white butterfly.

Greasy cutworm (GC) is found in open areas below the snowline...

Greasy cutworm (GC) is found in open areas below the snowline throughout NZ. Although generally considered a minor pest, it can be a serious problem in some field crops.

Leaf miners (LM) are flies which are found throughout NZ. The...

Leaf miners (LM) are flies which are found throughout NZ. The larvae live in leaf tissue, in the mines or tunnels they create as they feed. They have a wide range of host plants, including most brassicas.

There are several species of springtails, the only one causing...

There are several species of springtails, the only one causing damage to brassicas being the garden springtail (Bourletiella hortensis). They are found throughout NZ, with little known about their lifecycle.

Nysius huttoni (also known as wheat bug) is found throughout NZ...

Nysius huttoni (also known as wheat bug) is found throughout NZ, particularly in the drier Central and North Otago and East Coast regions. It causes damage to emerging brassica crops by feeding on the young stems.

White butterfly (WB) is found throughout NZ. The caterpillar...

White butterfly (WB) is found throughout NZ. The caterpillar causes damage by feeding on the leaves of brassica crops.