<p>Strong demand for cashew nuts is driving up prices in Brazil's three largest producer states.The price of a kilo of cashew nuts in the domestic market has jumped up once again in October to BRL1.74 (USD0.77) in Ceará, BRL1.77 in Piauí and BRL1.76 in Rio Grande do Norte, according to a new report issued by the country's National Supply Company (CONAB) in November.</p>