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

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