Idaho OnePlan recommends the website of the
Idaho Weed Awareness
Campaign as the best resource for up-to-date information about
Idaho's noxious weeds, and their control.
Source for this page: Idaho's Noxious Weeds by Robert H. Callihan & Timothy W. Miller
Silverleaf nightshade (Solanum elaegnifolium) is native to the central U.S. The plant spreads by seeds and rhizomesA creeping, underground stem, and grows under a variety of environmental conditions. Berries and foliage are poison to livestock.
Silverleaf nightshade is a perennialPlant that lives for more than 2 growing seasons that grows up to 3 feet tall. Leaves are lance shaped, somewhat wavy along the edges, an inch or less in width, and up to 5 inches long. Stems are armed with a few yellowish thorns. Both stems and leaves are covered with downy hairs, giving the plant a silvery appearance. Flowers are about 1 inch wide with 5 bluish to lavender or occasionally white petals, surrounding 5 bright yellow anthersStructure in a flower in which pollen is formed clustered in the center. Flowers are borne from midsummer until frost. Fruits are smooth, orange-yellow to dark colored, many-seeded berries. The plant has extensive horizontal rhizomes from the crown.
Silverleaf nightshade is found throughout the central U.S. and occasionally in the West. Idaho infestations are noted in the map.
Herbicides are registered for control of Silverleaf Nightshade. No biological control agents are available for Idaho.