Identification of paraquat-resistant Solanum nigrum and S americanum biotypes

Confirms sweetpotato (kumara) growers' field observations that populations of paraquat-resistant solanaceous weeds are now common, identifying them as Solanum nigrum L and Solanum americanum Mill. Explores the relationship between paraquat application rates and plant responses for Solanum weed populations derived from commercial sweetpotato fields. Source: National Library of New Zealand Te Puna Matauranga o Aotearoa, licensed by the Department of Internal Affairs for re-use under the Creative Commons Attribution 3.0 New Zealand Licence.