Seed :: Vegetables :: Bellary Onion

QUALITY SEED PRODUCTION IN BELLARY ONION

Season:
May – June

Pre-sowing seed treatment
Sand matrix priming with 80 % water holding capacity for 24 h drying back to original moisture content

Seed rate:
6 - 8 kg of graded seed/ha.

Transplanting:
Seedlings of 35 - 40 days may be transplanted in the main field on both sides of the ridges.

Spacing:
20 x 10 cm.

Fertilizer application:
FYM : 25 t/ha.

Application	N	P	K
Basal kg /ha	30	60	30
Top dress (30th day) kg / ha	30	-	-

Harvest
Well-matured bulbs are harvested at 110 - 115 days.

Bulb grading
Medium sized bulbs weighing 40 - 50 g or large bulbs with > 2.5 cm diameter and medium size with 2.1 – 2.5 cm diameter are selected.

Bulb treatment
The top 1/3rd of the bulb is removed and treated with fungicides either carbendazim or mancozeb at 20 g in 10 lit of water for 5 – 10 minutes

Bulb sowing
The treated bulbs are sown on the ridges during October - November.

Spacing
50 x 20 cm.

Harvest
The earheads are harvested during March when 50 % of the seeds in umbels turn into black color, to prevent the shattering loss

Seed extraction
The ear heads are dried under sun and the seeds are extracted by beating with pliable sticks.
Seed grading
The seeds are graded by using BSS : 10 x 10 wire mesh sieve (2.5 mm) or 6/64" round perforated metal sieve.

Seed yield:
500 - 600 kg/ha

Seed storage
The seeds are dried to reduce the moisture content to 6 - 8 % and treated with carbendazim 50 % WP @ 2 g /kg seed or halogen formulation (bleaching powder + CaCO3 + arappu leaf powder @ 5:4:1) @ 3 g/kg seed and stored in polythene bags.