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The Field experiment was conducted at S.H.I.A.T.S during rabi season of 2011- 2012 to show the effect of Tracel @ 2500 g/ha (N,P,K) Ril-057/F1@1000/ha (formulation) + Tacel @ 2500 g/ha Mancozeb 75% @ 1500 g/ha (formulation) Ril-057/F1 @ 1000 g/ha (formulation) + Mancozeb 75 % WP @ 1500 g/ha (formulation) Ril-057/F1 @ 1000 g/ha (formulation) as compare to Control in the form of foliar spray to manage the early blight of potato. The Experiment was analyzed by using randomized block design (R.B.D.). Foliar spray with Ril-057/F1@1000g/ha (formulation) + Mancozeb 75 % WP @ 1500 g/ha (formulation) proved to be most effective against early blight of potato showing minimum disease intensity at 45, 60 & 75 DAS (6.25, 13.25 & 21.50%) and producing maximum yield (148.75 q/ha) (74.41 cm), plant height at 30, 60, 90 DAS (21.25, 42.12, 52.27 cm) followed by Mancozeb 75% @ 1500g/ha minimum disease intensity at 45, 60 & 75 DAS (9.25, 15.50 & 23.50%) and maximum plant height at 30, 60, 90 DAS (19.97, 40.35,49.80 cm). It was observed Ril-057/F1 @ 1000 g/ha (formulation) + Mancozeb 75 % WP @ 1500 g/ha (formulation) was significantly superior as compared to other treatments. Thus foliar spray with Ril-057/F1 @ 1000 g/ha (formulation) + Mancozeb 75 % WP @ 1500 g/ha (formulation) can be made become a part of management of early blight of potato.
Keywords: Potato, Alternaria solani and fungicides