Other commodities whose availability declined are wheat flour (71 per cent), rice (68 per cent) and sugar (67 per cent).
Other countries that were affected are Somalia and Ethiopia.
Vendors in several counties have reported an 83 per cent drop in availability of maize flour due to the recent locust invasion that ravaged huge swathes of farmland.
The latest market monitoring survey by the Kenya Cash Consortium (KCC) in partnership with aid organisations Oxfam and Concern Worldwide, shows supply of beans has also dropped by 80 per cent in Turkana, Mandera, Samburu, Isiolo, Marsabit and Wajir counties.
