Native to North and South America, armyworm, a kind of caterpillar that burrows deep into corncobs and more than 100 other kinds of plants, was detected on the African continent last year.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/african-nations-and-scientists-sound-alarm-over-spread-crop-pest
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/environment-news-network
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fao
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crop-pests
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/zambia
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/malawi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ghana
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-africa