Vol. 10, Issue 11 (2021)

Author(s):
Pragati Kabi and Ashok Mishra

Abstract:
An experiment was conducted at All India Coordinated Research Project on Potato under Odisha University of Agriculture and Technology, Bhubaneswar, Odisha during rabi, 2020-21 to study the impact of cutting and chemical treatment to seed tuber on emergence, vigour and productivity of two promising potato hybrids, Kufri Pukhraj and Kufri Surya. The experiment was laid out in split plot design with eight treatments and three replications. The eight treatments comprised of two promising varieties of the state, namely Kufri Pukhraj and Kufri Surya; two seed types viz. whole and cut; and two fungicides for chemical treatment viz. copper oxychloride and mancozeb. Data on characters like plant height, shoots/ plant, leaves/ plant, shoot dry weight / plant and root dry weight / plant were recorded from ten randomly selected plants in each plot. The total and marketable tuber yield/ ha (number and weight) were estimated from the plot yield data. Analysis of variance revealed significant difference between the two varieties with respect to all the observed characters except shoots/plant. The variation between seed types was found to be non-significant with respect to plant height (at 45 and 60 DAP), leaves/plant, total and marketable tuber yield/ ha (number and weight) but significant for emergence, plant height at 30 days, and shoot and root weight. Similarly, there was no significant difference between two chemical treatments for characters like emergence, shoots and leaves /plant (at 30, 45 and 60 DAP) and dry shoot weight/ plant but significant variation for plant height (at 30, 45 and 60 DAP), root weight, and total and marketable tuber yield. No significant interaction was found among the three factors- variety, seed type and chemical treatment for any character. Kufri Surya was found to be a better yielding variety than Kufri Pukhraj for the agro- climatic condition of Odisha. Mancozeb treatment gave better result than copper oxychloride treatment and use of whole seed tubers was found superior to cut seed tubers.