Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Rhamphicarpa fistulosa on peanut (Arachis hypogaea), soybean (Glycine max), and tossa jute (Corchorus olitorius) in Togo.

Abstract

A field survey conducted from July to September in 2012 in northern Togo revealed that groundnut, soyabean and tossa jute (Corchorus olitorius) lowland fields were infected by Rhamphicarpa fistulosa. This parasitic plant was found on various types of soils, from clayey to sandy. The estimated yield losses were 6% for tossa jute, 7% for groundnut and 9% for soyabean. The host symptoms observed were slower growth of groundnut, soyabean and tossa jute, along with leaf chlorosis, lower fruit production, and numerous abortions. The infestation of groundnut, soyabean and tossa jute crops was confirmed by verifying the attachment of R. fistulosa on the roots and and the analysis of the morphology of the weed. This is thought to be the first report of R. fistulosa infection on groundnut, soyabean and tossa jute in Togo.