Fall armyworm status and distribution: "Government authorities have reported that armyworms have caused damage across the country, describing the outbreak as a threat to national food security and maize production in the country (Agro News Nigeria 07/02/2017). In October 2016, the Nigeria Agricultural Quarantine Service confirmed 100% infestation of farms by armyworms in the three senatorial districts of Benue State (Agro News Nigeria 20/10/2016). As of February 2017, 22 states have been affected by the caterpillar (Agro News Nigeria 07/02/2017)." --ACAPS Thematic Report: Armyworm outbreak in Africa, 2017.

Estimated yield loss: 

References:

AFRICA Fall Armyworm Outbreaks. ACAPS Thematic Report (2017). https://www.acaps.org/sites/acaps/files/products/files/20170425_acaps_thematic_report_southern_africa_armyworms_update.pdf