Effect of growth regulators on days taken to physiological maturity, number of marketable and unmarketable tuber per plant in sweet potato (Ipomoea batatas (L.) Lam.)

Abstract

A field experiment was carried out during kharif2016-17 at Kittur Rani Channamma College of Horticulture, Arabhavi (Karnataka) to study the effect of growth regulators yield of sweet potato [Ipomoea batatas (L.) Lam.]. The minimum days taken for physiological maturity (101.67) were found in treatment combination of GA3 @ 100 ppm and CCC @ 250 ppm (T10), followed by (102.33) treatment combination of GA3 @ 50 ppm and IBA @ 200 ppm (T9), while the maximum days taken for physiological maturity (119.33) were observed in control (T11) treatment. The (number of marketable tubers significantly ranged from 3.78 to 7.61 with different concentration of growth regulators. Maximum number of marketable tubers (7.61) was found in combination of GA3 @ 100 ppm and CCC @ 250 ppm T10), followed by single treatment (T6) of CCC @ 300 ppm (6.50). Whereas, the minimum number of marketable tubers (3.78) was observed in control (T11).