• Land should be free of volunteer plants.
• 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 quality seed production, a distance of 200 m (African Tall) all around the field from the same and other varieties of the crop should adopted. .

• Seed rate : 20 kg/ha.
• Spacing : 60 x 20 cm (65 x 15 cm)
• Fertilizer requirement : Apply NPK @ 175 : 90 : 90 kg / ha + 25 kg ZnSO 4 / ha as basal.

Seed Treatment

• Carbendazim @ 2 g / kg of seed along with carbaryl @ 200 mg / kg of seed.
• Treat the seeds with halogen mixture (CaOCl 2 + CaCO 3 + arappu leaf powder mixed in the ratio of 5:4:1 ) @ 3 g / kg as eco-friendly treatment.

• Short term storage in gunny cloth bag (8 - 9 months) with 9-10% moisture content .
• Medium term storage in polylined gunny bag (12 - 15 months) with 8 - 9 % moisture.
• Long term storage in 700 gauge polythene bag (> 15 months) with 8% moisture.