Black Garden Ants

Latin Name: Lasius niger

Months of Activity: June - September

The black garden ant is the most common ant in Britain, and can be found across all regions of the UK. Keen explorers, black garden ants are most active during the early summer months as they attempt to increase the food supply to their queen and her young.

Black garden ants can often become a problem for gardeners as they farm aphids, which can subsequently attack crops of fruit and flowers.

Appearance

• A black garden ant worker is between 3-5mm long and, despite its name, is dark brown in colour.
• The black garden ant queen is around 15mm long and has mid-brown colouring.

Lifecycle

Mating of the black garden ant takes place over a short period of time, normally during the warm summer months of July and August, when swarms of ants take to the air. After mating, the male dies, and the newly fertilised queen will begin to search for a suitable nesting site where she will overwinter.

The first eggs are laid in late Spring, and it normally takes about 3-4 weeks for the white legless larvae to hatch out. The larvae feed on secretions from the queen's salivary glands until the first worker ants emerge around 5 weeks later.

The worker ants then take on their duties of larval care, nest building, and foraging for food while the black garden ant queen concentrates on laying eggs.

Pest Control

Black garden ants do not pose any major threat to our health, but they can become a real nuisance when they enter our homes and workplaces.

Effective control of the black garden ant is only viable on a small scale. It is generally accepted that the best method is through barrier spraying at wall / floor junctions. Large infestations should be tackled by a pest control professional who can use the correct type of insecticide for the job.

Latest News about Black Garden Ants

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