B. P. Sharma, P. Bhattarai and B.P. Luitel

DOI

ABSTRACT

Field experiment was conducted at Nigale, Sindhupalchok located at 2450 masl during 2007 and 2008, with the objective of identifying potato clones resistant to wart (Synchytrium endobioticum). Nigale is one of the wart disease prone areas of the country. A total of 80 potato clones in 2007 and 45 clones in 2008 were planted in an augmented experimental design on a severely wart infested farmer’s field. Commercially grown, locally adopted and highly wart susceptible potato cultivar ‘Rosita’ was used as check and crop was grown under rain fed condition. Susceptible cultivar was planted after each nine-test row. Experiment was planted during first fortnight of February in both the years and harvested in first week of July. Apparently healthy and wart infested tubers were counted and wart incidence percent was obtained at the time of harvest along with tuber yield per plot. Clones with complete absence of wart on the surface of tubers were considered as wart resistant. Thirty eight CIP accessions and five national crosses i.e C x LBr 44.14, D x LBr40.10, D x LBr43.12, D x LBr43.13, D x LBr44.6 were found resistant to wart, whereas, potato clones Kufri-Chipsona-2, 393637.10, 394007.55, 392236.6, 388572.4 and 393280.64 were found highly susceptible to wart under field conditions.