Effect of dehaulming on yield of seed potatoes

Abstract

A field experiment was conducted for producing higher processing grade tuber yield and quality by evaluating in relation to different planting times (31 October, 15 and 30 November) and dehaulming dates (80, 90 and 100 days after planting) during 2012-13 potato growing season at Bangladesh Agricultural Research Institute, Gazipur. Results revealed that different growth parameters like plant height, leaves number per hill and foliage coverage were significantly influenced by planting times. Processing and non processing grade tuber number and yield were significantly affected by all the treatments and their interaction. Significantly higher yield of processing grade tuber were recorded in November 15 planting in combination with all the dehaulming dates, ranged from 20.67 to 21.50 t/ha. Processing quality parameters like specific gravity, dry matter, reducing sugar content were significantly varied by planting times, dehaulming dates and their interaction. Whereas the potato chips colour score were not affected by the planting time and dehaulming but all the processing quality parameters were remained in acceptable range. The highest net return (Tk 1,68,404/ha) with a BCR of 1.93 was obtained in November 15 planting with dehaulming at 90 days after planting.

Agro-techniques for Production of Seed Size Tubers in Conventional Seed Potato Production System–A Review

“…Haulm killing for 70 days recorded significantly higher seed size tuber (409 thousand ha -1 ) over 80 and 90 days of haulm (Mahmud et al, 2009). Among haulm killings duration, 80 and 90 days haulm killing which are at par (238 000 ha -1 ) recorded significantly higher tuber number over 70 days haulm killing (214000 ha -1 ) in three cultivars viz Kufri Lauvkar (early maturing) and Kufri Jyoti and Kufri Gaurav (both medium maturing) when evaluated for production of seed size tubers (25-125 g) with three haulm killing dates viz 70, 80 and 90 days after planting.…”

“…Varietal difference may occur for seed size tuber production as the cultivars vary in maturity and their bulking capacity. In terms of seed tuber percentage, Multa was the best (72.60%) followed by Ailsa (71.82%) and Dheera (71.74%) under Bangladesh conditions (Mahmud et al, 2009). Kufri Jyoti (217 thousand ha -1 and 48.30%) and Kufri Gaurav (288 thousand ha -1 and 44.60%) recorded significantly higher seed size tuber number over Kufri Lauvkar (185 thousand ha -1 and 49.39%) under Gwalior conditions of Madhya Pradesh, India (Sadawarti et al, 2021b unpublished).…”

“…potato is only 1:6 and production cost is very high due to stringent quality control. Seed production is very technical aspect and needs careful attention during all stages like date of planting, spacing, fertilization, top-dressing, irrigation, roguing, weeding, earthing up, spraying of pesticides, date of dehaulming, harvesting, etc (Mahmud et al, 2009). Quality of seed potato is important for good yield therefore seed production; harvesting (haulming and harvesting) and storage should be carefully carried out (Correa et al, 2007).…”

Elements Affecting Seed Potato Quality In India- A Review

“…Essentially, the potato seed production programme is based on elimination of the prevalent viruses in a given region from the seed stock and its further multiplication under vector free/low vector pressure conditions (Singh and Sharma, 2018). Seed production is very technical aspect and needs careful attention during all stages like date of planting, spacing, fertilization, topdressing, irrigation, roguing, weeding, earthing up, spraying of pesticides, date of dehaulming, harvesting, etc (Mahmud et al, 2009). Any mistake or laziness at any stage of seed potato production can hamper the quality of seed.…”