Pests, weeds diseases

Black beetle is a pest found in warm regions of the upper North Island, especially on light or peat soils. They can cause significant pasture damage.

Black field cricket is a major pasture pest in regions such as Northland and Auckland, predominantly affecting clay soils that crack in dry summers. These crickets feed on pasture grasses at night and hide in soil cracks during the day.

Clover root weevil (CRW) is a pest that affects clover, a vital plant in many pastures. This weevil, first detected in Waikato and Auckland in 1996, can be found year-round but is most plentiful in summer.

Fall Armyworm is a plant pest that can feed on over 350 plant species, particularly sweetcorn and maize. Its spread typically begins in December, so early detection and regular monitoring are key to protect your feed and prevent the pest’s spread.

Giant buttercup, one of 14 weedy Ranunculus species in New Zealand, is harmful to dairy pastures because cows find it distasteful due to its toxin, protoanemonin. This weed spreads across dairy farms, damaging pasture quality.

Velvetleaf is a pest that affects crops, seen in fodder beet and maize crops nationwide. This weed can live on farms for up to 50 years and withstands digestion and silage methods.

Yellow bristle grass (YBG) is a pest plant harmful to pastures. This fast-spreading weed lowers pasture quality as cows avoid eating it. YBG spreads mainly through its seeds, which can move via dung, water, animals, or contamination in hay and maize.

On this page, you'll find details about different pests and diseases that can harm brassica plants. These include cabbage grey aphids, diamondback moths, leaf miners, Nysius flies, springtails, white butterflies, club root, and dry rot.