Dalbargia sissoo (shisham) is one of the most profusely planted trees in Islamabad. Yellowing of its foliage and subsequent death caused considerable alarm in the nation's capital. A study was started in 16 and 6 year old blocks to find out if irrigation, spray with dieldrin and use of N.P. could improve the situation. The study was maintained for five years and was assessed recently. It was found that fertilizers improved the growth of 16 year old plants and hence resistance to the disease but none of the three treatments had any effect on the younger plants.