Occurance of common scab disease of potato in western Uttar Pradesh

The surveys were conducted during the year 2019 - 2020 in five districts - Meerut, Muzaffarnagar, Bulandshahr, Shamli and Ghaziabad of western Uttar Pradesh to record the percent incidence and intensity of russet scab, typical common scab and pseudo russetting scab in potato produce. The russet scab was found in all the potato varieties grown under potato development program in different districts of western Uttar Pradesh. The incidence was observed from 1.2 - 6.36% (D.I 0.01 - 2.25). The potato producing area was found more susceptible by carrying the russet scab symptom from 2.67 - 6.36% (D.I 1.39 - 2.25). Pseudo russetting scab incidence in potato produce was found more 1.89 - 5.31% (D.I 0.31 - 1.8) in comparison to russet scab. The russetting scab was due to the application of high doses of phosphorus and potash fertilizers and also soil alkalinity.