Screening of heat tolerant potato varieties for their yield potentiality in Karnataka

Abstract

A field study was conducted on screening of heat tolerant potato varieties for three consecutive years from 2015 to 2017 at HREC, Hassan, Karnataka under AICRP-Potato. An experiment was laid out in RCBD with four replications. The crop was sown at standard spacing of 60 cm X 20 cm with soil application of recommended dose of fertilizers of 75: 75: 100 kg NPK per hectare and FYM (25 t/ha).The varieties such as Kufri Lima, Kufri Surya and Kufri Himalini were evaluated for marketable, total tuber yield and dry matter during harvest at 75 and 90 days after planting. The pooled data of three years indicated that, Kufri Lima documented highest marketable tuber yield of 17.86 and 17.53 t/ha and total tuber yield of 18.98 & 19.31 t/ha at 75 and 90 DAP followed by Kufri Himalini recorded 14.36 & 16.98 t/ha of marketable tuber yield and 16.36 &19.24 t/ha of total tuber yield at 75 and 90 DAP, respectively. Whereas, dry matter percentage was noticed significantly highest in Kufri Himalini (19.88%) followed by Kufri Surya (19.48%). Therefore, it was concluded that Kufri Lima was found best suitable heat tolerant variety for cultivation in Karnataka during Kharif season.