Rural Solutions SA FOR

Executive summary Silverleaf nightshade (Solanum elaeagnifolium) is a deep rooted perennial plant that inhabits warm temperate regions of Australia. Native to the Americas, it has been in Australia since the early twentieth century and is now recorded in all States and Territories apart from Tasmania. The most serious infestations occur in the wheat belt areas of New South Wales, Victoria and South Australia. In SA, up to 200,000 ha of land are infested. Once established, silverleaf nightshade is very difficult to eradicate. Although aerial growth is usually up to 60 cm high, each plant has a very extensive root system that can extend to 3 m deep and 2 m horizontally. Silverleaf nightshade impacts significantly on cropping and pastures by reducing yield and carrying capacity. There are currently very limited effective broadacre control methods as its extensive root system allows it to survive chemical and mechanical methods. Prevention of spread to clean areas is the most effective management action