Assure that the seeds for
further multiplication are either from a research station or government farm
or recognized seed producers.
The land used for seed production should be free from volunteer plants of
other varieties grown previously.
To assure genetic purity, a minimum isolation distance of 3 m from other
varieties may be given in the field. Harvesting for seed purpose can also be
done leaving a border row of 3 m within the field.
Rogue diseased plants, weeds and off-types in time. Line planting facilitates
rouging and giving alleyways of 30 cm after every
3 m planting helps in manuring, plant protection operations and supervision.
Drain water at least one week before harvesting to assure that the plants
attain equal maturity at harvesting. Harvest the crop when 80% of the grains
in a panicle are mature (at physiological maturity).
During summer months, assure that the plants get sufficient water at dough
stage till maturity.
Thresh the sheaves on the same day of harvest, as seeds of heaped sheaves
may not perform well.
Dry seeds properly and assure that the moisture content is not more than 13
Avoid excess drying in summer months especially short duration varieties as
it reduces the period of viability.
While drying and storing, avoid contamination from yards or through baskets
Seeds may be stored in damp-proof situations for avoiding absorption of
moisture from atmosphere thereby losing viability early.
Polythene bags of 700 gauge or double gunny bags may be preferred for
Never stack seed bags in open floors. Store on pallets or wooden benches.
The benches should be 30 cm away from wall and floor for proper aeration.
Never pile more than eight bags in a stack. This should be limited to three
bags if the seeds require further drying.
Avoid storing plant protection chemicals, herbicides, fertilizers etc. in
Fill up the cracks and crevices of storeroom by cementing to make it rat
Spray 2% malathion solution in the godown before storing seeds to check
Place pieces of cloth dipped in neem oil between stacked bags or neem oil
cake covered in cloth bags inside seed bags to ward-off pests.
Test seed germination at monthly intervals if the seeds are to be stored for
more than eight months.
The viability of short duration varieties can be extended for a further
period of 2-3 months at 80% level if the seeds are soaked for four hours in
water and re-dried in shade, back to original weight at 13% moisture
content. Seeds of short duration varieties like Jyothi and Triveni of
virippu crop reach this level of germination 9-10 months after harvest and
that of mundakan 8-9 months after harvest when stored under ambient