chapter
Stem Nematode: UFRA
WithM. Shamim Jairajpuri, Qaiser H. Baqri
Pages 11

Ditylenchus angustus is an obligate and serious pest of rice causing the well-known 'ufra' disease. Sometimes chlorosis may be observed in the infested young seedlings within the week after infection. The symptoms of ufra are well established in two months old crops. Mondal et al. have also noted that the combined effect of ufra and sheath rot increases the yield loss compared to their individual effect. Similar results have been found when ufra is combined with bacterial leaf blight. Association of leaf and node blast on ufra infested stem has also been reported by Y. Rathaiah. Since the stem nematodes generally wait on stubbles, ratoons, wild rice and some weeds for the next crop, the burning of all these left overs after harvesting is a very effective method for the control of ufra disease. The left over stubbles should be uprooted and allowed to be dried in the field before they are set on fire.