Guar seed prices on Friday declined Rs 44 to Rs 5,502 per 10 quintals in the futures trade amid an increase in supply from producing regions. On the National Commodity and Derivatives Exchange, guar seed contracts for July delivery plummeted Rs 44 or 0.80 per cent to Rs 5,502 per 10 quintals with an open interest of 15 lots. Marketmen attributed the downward trend in guar seed prices to increasing supplies from growing regions.