Quality Seed Production In Redgram

By TamilNadu Agricultural University on 27 Aug 2016 | read
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Land requirement

  • Land should be free of volunteer plants.
  • The previous crop should not be the same variety or other varieties of the same crop.
  • It can be the same variety if it is certified as per the procedures of certification agency

Isolation

  • For certified seed production leave a distance of 100 m all around the field from the same and other varieties of redgram
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  • Soak the seeds for 3 h in 100 ppm ZnSO4, (10g/100 lit of water) at 1/3 volume before sowing and quickly air dry in shade to their original moisture content.
  • Slurry treat the seeds with carbendazim 75% WP @ 2 g dissolved in 5 ml of water per kg of seeds and air-dried
  • Pellet the seeds with Rhizobium culture (50 g kg-1 of seed) before sowing

Pre-sowing seed treatment

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Foliar application

  • At the time of first appearance of flowering, spray 2% DAP and a second spray is given 15 days after the first spray.
  • At first flowering, spray NAA 40 ppm and after a fortnight the second spray is given. 
  • NAA can be mixed with fungicide and insecticide

Harvest

  • The pods attained physiological maturation at 40 days after 50% flowering.
  • Harvest the pods as one or two pickings for harvesting the quality seeds.


Drying

  • Dry the pods immediately to about 12 to 13 per cent moisture content.
  • Dry the seeds to 10 % moisture content


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Seed grading

  • Size grade the seeds using wire mesh sieve BSS 5 x 5 (width of square aperture 3.35 mm) for large seeded varieties and BSS 6 x 6 (2.8 mm) for small seeded varieties.
  • Do not select the discoloured and broken seeds for seed purpose

Seed treatment

  • Slurry treat the seeds with carbendazim @ 2g using 5 ml of water kg-1 of seed (or)
  • Dress the seeds are dry with halogen mixture (Pure CaOCl2 + CaCO3  + arappu(Albizzia amara ) leaf  powder at (5:4:1) ratio) @ 3g/kg of seed (or)
  • Treat the seeds with neem oil/ groundnut oil or leaf   powder of tobacco/ notchi/ neem/ Albizzia amara (arappu) or fruit rind powder of Sapindus laurifolius (Poochi kottai) or Acacia concinna (Soapnut powder) @ 1:100 ratio.

  • Storage

  • Store the seeds in gunny or cloth bags for short term storage (8-9 months) with seed moisture content of 8-9 %.
  • Store the seeds in polylined gunny bag for medium term storage (12- 15 months) with seed moisture content of 8 – 9 %.
  • Store the seeds in 700 gauge polythene bag for long term storage (more than15 months) with seed moisture content of less than 8%

Source

The Professor and Head,

Department of Seed Science & Technology, 

TNAU, Coimbatore-641003.

Phone:0422-6611363

Email: seed@tnau.ac.in

 

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