The price of lemons increased the most of all food products in June, according to data released by the Istanbul Chamber of Commerce. Lemon prices rose 30.37 percent because of the decline in supply, followed by hazelnuts, prepared food and walnuts by 20.04 percent, 8.35 percent and 7.56 percent, respectively. The price of tomatoes decreased most with a 37.76 percent decline in the same period.