Effect of seed soaking and foliar spray of PGRs on growth and yield components of potato (Solanum tuberosum L.) cv. Kufri Pukhraj

A field investigation was carried out at Research cum Instructional Farm, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh) during year 2019-20 to study the effect of plant growth regulators and their methods of application on growth and yield performance of potato. The experiment was conducted in Factorial Randomized Block design consisting 10 treatment combinations comprised of two levels of methods of application viz., M₁ (Seed treatment) and M₂ (Foliar spray) and five levels of PGRs (plant growth regulators) viz., R₁ (control), R₂ (GA₃ @ 25 ppm), R₃ (GA₃ @ 50 ppm), R₄ (IBA @ 100 ppm) and R₅ (IBA @ 200 ppm). Results revealed that among the mode of PGRs application, spraying method was found better than seed treatments and recorded for higher total yield (28.91 t/ha) while among PGRs used, the application of IBA @ 200 ppm was most effective for potato as recorded the highest total tuber yield of 29.31 t/ha, which was at par with IBA 100 ppm with total tuber yield of 29.11 t/ha. The interaction effect of these two factors revealed that treatment like spraying of IBA @ 100 ppm was most effective for enhancing the tuber yield (30.57 t/ha) with maximum net realization (328078.91 Rs./ha) as well as B:C ratio of 2.28.