Ant nests can be a real problem to control in border soils and lawns, causing raised areas of soil and disruption to plant roots. Ants also protect aphids against ladybirds and other predators. Control them with Agralan Ant Nest Nematodes! These microscopic worms help control both black and red ants' nests. Simply dilute with water before use. Use between April and September for effective control. Apply to moist compost/soil when the soil temperature is above 12 degrees using a watering can or nematode applicator. Treatment can be repeated affter 4-6 weeks with severe infestations. One pack treats up to 6 nests. Up to 10m2.