Chemical maturity of potato processing cultivars grown in Western Uttar Pradesh*

Six potato cultivars including four Indian and two exotic were evaluated for chemical maturity at three dates of harvest. Minimum reducing sugar level was achieved at 80 days of harvest in cvs. Atlantic and FL-1533, at 90 days in cv. Kufri Chipsona-1 and at 100 days in cvs. Kufri Chipsona-2, Kufri Jyoti and Kufri Lauvkar. The lowest sucrose content was obtained at 90 days in cv. Kufri Chipsona-1 and at 100 days harvest in rest of the five cultivars. The sucrose content of <150 mg/100g fresh weight was not obtained in any of the cultivars at any stage. Acceptable chip color was attained in cvs. Kufri Chipsona-1 & Chipsona-2 at 90 days of harvest while in Atlantic it was 80 days. Except for cvs. Kufri Jyoti and Kufri Lauvkar, all other four cultivars had dry matter content of more than 20 percent at 80 days of harvest.