The linked article is entitled: “Fall armyworm 'threatens African farmers' livelihoods'.http://www.bbc.com/news/science-environment-38859851
Extract: “Scientists are calling for urgent action to halt the spread of a pest that is destroying maize crops is spreading rapidly across Africa.
The armyworm, so called because it eats its way through most of the vegetation in its way as it marches through crops, is native to North and South America but was identified for the first time in Africa last year.
Cabi chief scientist Dr Matthew Cock said: "This invasive species is now a serious pest spreading quickly in tropical Africa and with the potential to spread to Asia.
"Urgent action will be needed to prevent devastating losses to crops and farmers' livelihoods."
Scientists think the caterpillar or its eggs may have reached the continent through imported produce.
Once established in an area, the adult moths can fly large distances and spread rapidly.“