Prices of moong, arhar, gram daals and maida have decreased in the wholesale foodgrain market. On Tuesday, moong dal opened at 7,500 rupees, a sharp fall of 800 rupees per quintal. Arhar was down by 200 rupees per quintal to 12,500 rupees. Gram dal was lower by 400 rupees per quintal to 9,500 rupees. Maida was less by 100 rupees to 2,600 rupees.Prices of urad dal,sugar wheat and sooji ruled steady.