Kenya steps up measures to contain deadly maize disease

Wilson Songa, the ministry's agriculture secretary said the virus - which makes the plant to turn yellow and dry up - had mostly affected the south rift, a part of the country's main bread basket and the eastern region.

"The total (affected) acreage of the last survey we did (July) is 64,115 hectares. Eighty percent of that crop was destroyed," he told Reuters.

"That means our food security will be at stake and that is why we are taking this disease very seriously."

The government fears further spread of the disease that makes plants to dwarf and age prematurely, could be catastrophic if it extended to Trans Nzoia in Kenya's Rift Valley, which produces 60 percent of the country's maize production.

"We don't know how serious it will be next season. With such serious incidence, we are advising (farmers) to go for alternative crops to try and reduce the (virus)," said Songa.

He said the combination of two viruses that make up the maize disease was "perplexing", adding spraying insecticides was under way and some farmers were advised to burn the crop.

There are two maize seasons in Kenya, March-May which is the main season and Oct-January Affected farmers have been advised not to plant maize in the second season, further casting doubt on the availability of the staple.