Striga-Infested Agricultural Field in Ethiopia (image) Netherlands Institute of Ecology (NIOO-KNAW) Share Print E-Mail Caption The parasitic weed Striga severely reduces crop yield in sub-Saharan Africa. Credit Taye Tessema / Ethiopian Institute of Agricultural Research (EIAR) Usage Restrictions This photo may only be used in combination with reporting on the PROMISE research project. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.