However, prices of foodstuffs like rice, beans, and garri have remained stable.
A market survey by the News Agency of Nigeria (NAN) on Wednesday in Abuja confirmed this information.
The same set of yam was sold before now between N3,000 and N4,000.
Musa Ibrahim, a yam seller who sells yam on a cart confirmed the increment in the price adding that yam is now very expensive.
“I don’t have a tuber that can be sold for a lesser amount; these yams are white yams, they are not the type that are good outside and bad inside,” he said.
Bisola added that the expensive yams were also small in size and dry.
Irish potato is another expensive tuber crop in the market, according to the NAN survey.
Adamu Suleiman, a potato seller in the popular Nyanya Market also confirmed this.
“A basket of Irish potato is N2,500 and this same basket was sold before now, for N1,700 or less.
Issa Danjuma, a trader at Karu Market said he sold a dustbin basket of Irish potato for N2,600 adding that he used to sell it for
Danjuma also attributed the increase in prices of tubers such as yam and potato, to the rainy season saying they did not grow well during the rain.
Bassey Glory, a customer said she bought the small basket of Irish potato for N400, adding that she used to buy it between N250 and N300.
Glory lamented that potatoes sold in dustbin baskets were the most annoying because the sellers deliberately put the big tubers on top but when the basket was emptied, most of the pieces underneath were tiny.