Influence of haulm killing date and variety on production of seed size tubers in potato (Solanum tuberosum)

Abstract

Potato (Solanum tuberosum L.) varieties, viz. Kufri Lauvkar (early maturing), Kufri Gaurav and Kufri Jyoti (medium maturing) were examined during the years 2018–19 and 2019–20 for the seed size tubers production with 3 dates of haulm killing, viz. 70, 80, and 90 days after planting under West-Central Indian conditions at ICAR-Central Potato Research Institute, Regional Station Gwalior, Madhya Pradesh. Haulm killing at 80 (15.05 t/ha) and 90 days (14.60 t/ha) noticed significantly greater seed size tubers weight over 70 days' haulm killing (12.13 t/ha). Kufri Gaurav recorded substantially greater number of seed size tuber (288 t/ha) and weight (15.76 t/ha) than the other two varieties. Eighty days haulm killing was observed to be the best seed significantly: non-seed ratio (1.088 by numberand 0.659 by weight) followed by 70 days (1.140 by number and 0.734 by weight) over the poorest 90 days haulm killing (1.121 by number and 0.946 by weight). Therefore, for achieving high seed-size potato tubers, haulm cutting should be done at 80 DAP.