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100			_aJayasinghe C K
245		0	_aIncidence and severity of Corynespora leaf fall disease of rubber in Sri Lanka
260			_bProceedings of the First Symposium on Plantation Crop Research : Current Trends and Future Challenges,8-9 July, 2004, Sri Lanka, pp.129-135.
520			_aCorynespora leaf fall disease caused by Corynespora cassiicola is currently considered as the most destructive leaf disease of Hevea rubber in Asian and African continents. Several outstanding clones in the world namely RRIM 600, GT 1, RRII 105, RRIC 103 and RRIC 110 have already succumbed to the disease. During the years 2002 and 2003 an island-wide disease screening programme was launched using an internationally accepted protocol and determine the present disease situation of clones planted in Sri Lanka. The ranking of clones based on a disease severity index revealed that eight clones among the 34 clones screened were susceptible to the disease at varying intensities. No clone recommended for large scale planting was found to be infected with the disease. Two heavily affected clones namely RRISL 202 (a clone recommended for small scale planting) and RRISL 200 (experimental clone) were removed from the recommendation list and experimental trials respectively. Moderate, infections have been detected on two clones recommended for small scale planting namely RRISL 201 and RRISL 217 and it was decided to make further observations on these clones before recommending for growers. The other Group 2 clones susceptible to the disease was RRISL 133 and it showed very light infection. The rest of the susceptible clones represented the Group 3, genetic materials recommended for estate/research institute collaborative trials.
650			_aCorynespora leaf fall
650			_aDisease screening
650			_aHevea brasiliensis
650			_aResistant clones
700			_aFernando T H P S
700			_aNishantha N
700			_aSilva W P K
942			_cJS
999			_c60979 _d60979