My father has recently been diagnosed with ibs (irritable bowel syndrome)..what foods and therapies can u suggest to cure this ?

Stress reduction.: Since the cause for ibs is unknown (some studies showed that people with ibs has lower pain threshold in the bowel) but stress is considered an important factor, stress reduction (meditation?) would be the first step. A high fiber diet and regular exercise may also help. There are medications to reduce the symptoms but you will need a doctor since response to drugs vary from person to person.