Archives

An experiment was conducted under field condition in order to Evaluate different potato genotypes for late blight disease resistance in Deukhuri, Dang, Nepal. The experiment was designed as a single factor Randomized Complete Block Design with three replications of seven genotypes (PRP 277072.122, Cardinal, Local, CIP 395111.13, CIP 392027.7, PRP 367072.22, CIP 399067.22), during December 2022 to march 2023. Visual evaluation of plants at regular interval was done to note the biometrical parameters like: 1st emergence, 50% emergence, plant height, severity, Area under the disease progress curve (AUDPC), Relative Area under the disease progress curve (rAUDPC) and yield was recorded and conditions (Marketable / healthy tuber and non-marketable / infected tuber yield). From the analysis, it can be concluded that the cardinal (with mean AUDPC 2056.05) was the most susceptible and CIP 395111.13 (with mean AUDPC 695) was most resistant genotype. PRP277072.122 (mean tuber yield 15.63 t/ha) genotype followed by CIP 395111.13 (mean tuber yield 15.52 t/ha) genotype were most productive genotype in our experiment with less disease severity. From Pearson’s correlation analysis, a strong positive correlation is observed between Maximum Severity and AUDPC (0.94), Plant Height and Tuber Yield (0.72). Conversely, there was negative correlations of severity with plant height (-0.41) and with tuber yield (-0.64). In conclusion, we could suggest the farmers not to use cardinal variety in the conducive environment for late blight and at the same time PRP 277072.122 and CIP 395111.13 genotypes hold promise for further development and dissemination as improved varieties in regions with similar environmental conditions in the western terai of Nepal.