Treat aphids, diamondback moth & white butterfly before numbers rise
Region: All NZ
Keep an eye on aphids, diamondback moth caterpillars and white butterfly caterpillars in brassica crops. With warm summer temperatures, these can increase quickly. Treating these pests before high numbers occur will provide the greatest economic return.
Watch for plantain caterpillars and moths
Region: Bay of Plenty, Waikato, Gisborne, Hawke’s Bay, Taranaki, ManawatÅ«, Whanganui.
Plantain moths and caterpillars populations may be high or building up. Apply insecticide early to prevent damage occurring.
Damage from black beetle larvae may be showing
Region: Northland, Auckland, Bay of Plenty, Waikato
In the northern North Island, damage from black beetle larvae may be showing. Unfortunately little can be done to prevent this. Adults are deterred by some endophyte-infected grasses which will reduce egg-laying and larval numbers. See DairyNZ Pasture Renewal Guide.
Watch for Tasmanian grass grub beetle flights
Region: Gisborne, Hawke’s Bay
Watch for Tasmanian grass grub beetle flights, large numbers of beetles flying may indicate potential damage from the larvae in autumn and winter.
Time to apply diflubenzuron for porina control
Region: Bay of Plenty, Waikato, Gisborne, Hawke’s Bay, Taranaki, Whanganui, ManawatÅ«, Wellington, Nelson, Tasman, Marlborough, Canterbury, West Coast, Otago, Southland.
The early flight of porina moths has passed but the second significant flight is about to occur in the South Island and could take place anytime between now and the end of February. Further flights may occur in March in the North Island. In areas that experienced an early (October/November) porina flight, mid-January to mid-February is the optimal time to be applying diflubenzuron.Social tagging: Aphid > Black beetle > Diamondback moth > Pest Alert > Porina > Tasmanian grass grub beetle