Maize farmers in Kiambu County have been urged to be on high alert and report any signs of lethal necrotic disease in maize plants to the agricultural extension officers.
The County Director of Meteorological Service, Mary Githinji, said due to the changing weather patterns, there was a likelihood of pests and disease prevalence in the county.
She was speaking on Thursday morning during a technical environmental committee meeting in her office in Kiambu.
"We are urging our farmers to report any case of the plant disease to us," she said.
She said the unpredictable weather patterns were likely to increase diseases and advised farmers to have adequate pesticides to control them.
Mrs Githinji said apart from the anticipated maize disease there is likelihood of more cases of blight for tomatoes and potatoes, black rot in cabbages and rust in wheat.
She added that during the current rain season low lying areas may experience flash floods and leaching of fertilizers from lake catchment areas.
The director said water logging was likely to occur and gullies formed on farms, which may lead to low harvests.
She said the current rains will be prolonged and may interfere with harvest of tomatoes, potatoes and cabbages.