New scientific findings by KARI-NARL, the Ohio State University (USA) and FERA (UK) have established that the disease is caused by a combination of viruses, the main ones being the Maize Chlorotic Mottle Virus (MCMV), a virus that has not been reported in Kenya before and the Sugarcane Mosaic Virus (SCMV) which combine to cause Maize Lethal Necrotic (MLN) disease. Researchers say the disease is transmitted through seeds and maize pests such as thrips, stemborer, rootworms, flea
beetles and other insects. The disease has no cure.