KENYA-AGRICULTURE-ENVIRONMENT-FALL ARMYWORM

A fall armyworm is attacking a maize crop in a maize field in Vihiga, some 278km west of Nairobi, on April 18, 2018. - On farms across Africa, a seemingly innocuous brown and beige caterpillar is waging a silent war, devastating rural incomes and posing a major threat to the continent's food supply. In just two years, the so-called fall armyworm has colonised three-quarters of Africa, according to the British-based Centre for Agriculture and Biosciences International (CABI). (Photo by SIMON MAINA / AFP) (Photo credit should read SIMON MAINA/AFP via Getty Images)