Current and potential geographical distribution of the invasive plant Parthenium hysterophorus (Asteraceae) in eastern and southern Africa

M c C onnachie AJ, S trathie LW, M ersie W, G ebrehiwot L, Z ewdie K, A bdurehim A, A brha B, A raya T, A saregew F, A ssefa F, G ebre‐ T sadik R, N igatu L, T adesse B substantially more records were obtained from surveys. Most infestations were high density (>3 plants m −2 ). Distribution records were used to validate the CLIMEX model, which proved a useful tool. This study increased current understanding of the distribution of P. hysterophorus and developed a baseline from which to monitor future spread and abundance of P. hysterophorus . Additional surveys are required in other countries in Africa which are predicted by CLIMEX to be at risk. This will enhance integrated management decisions for the control of a weed which has implications for food security and human health .