Feasibility of biological control of silverleaf nightshade in Australia.

Silverleaf nightshade, Solanum elaeagnifolium Cav. is a significant weed in the cropping/ pasture and perennial pasture zones of temperate Australia. The extensive and deep perennial root system makes this plant extremely competitive, and the limited control techniques currently available are uneconomical for the treatment of large, dense infestations. Biological control is considered a highly desirable option to reduce the impact of existing infestations and slow rates of spread. This study aimed to determine the feasibility of commencing a biological control program for silverleaf nightshade based on a review of natural enemies associated with this species in the native range and an assessment of the organisms’ potential for biological control.