Kiwicare Pest » Pests » A – G » ants
Ants are social insects that can be a considerable nuisance pest when they enter the home and can be a significant biodiversity pest when exotic species are introduced to vulnerable habitats such as found in New Zealand.
To get rid of ants follow these simple steps:
Ants are social insects that can form colonies of many thousands of individuals. Foraging worker ants will search for food and are often found in trails running into homes, particularly kitchens and larders where they find and contaminate food. Ants form nests in dry, warm, underground spaces outside, often below paving, concrete, driveways, stones etc. Occasionally the nest will be within the fabric of a building but this is less likely.
The nests of some species will co-operate and can be regarded as a super colony.
Ant colonies contain at least 3 castes (some have a fourth caste of soldier ants):
Queens > which are fertilised females after the wings are cast off
Males > short lived often with wings to take part in nuptial flights with females that become queens
Workers > usually sterile females comprising the bulk of the colony.
Foraging workers that you may see out seeking food are usually only about 5% of the colony, so controlling the ants you see with insecticide is only temporary and should only be done after controlling the nest with baits.
Invasive ants such as argentine ants are more than just a nuisance pest. They are also a threat to New Zealand's biodiversity as they attack and eliminate other insects and invertebrates when they move into a new area. We are at risk of bringing biting ants such as red imported fire ant into New Zealand. There have been three incursions of Fire Ants in New Zealand since 2001 but these have been successfully eradicated by MAF Biosecurity.
As nuisance pests ants can cause electrical and electronic faults when they get into equipment such as switch gear, exchanges and computers, they can contaminate food stuffs, and damage garden plants.
Ant colonies will often combine during Winter and separate again in Summer. During Midsummer - late Autumn, swarms of winged males and females of many species take off on nuptial flights. After their nuptials the ants fall to the ground, the males perish and the fertilised females, now queens, cast their wings and crawl off in search of locations for the establishment of new colonies.
Scientific names of important pest ants in New Zealand:
Some ants 'farm' aphids and scale insects for sweet secretions and it worth treating your plants with suitable garden insecticides to control these sapsucking plant pests and deny the ants their food supply.
LAWNGARD PRILLS is useful in areas of garden where ants are a nuisance and as an additional barrier around a house or other building. The prills (granules) are sprinkled onto soil and gravel surfaces where ants are travelling and then watered in to take the insecticide deep into the soil, forming a curtain barrier.
More information on Darwin Ants, Argentine Ants and White Footed Ants.