Sunflower — 2Seed selection & treatment

• Seed treatment

  For rainfed sowing, soak seeds in 2% ZnSO4 for 12 hours and shade-dry. Treat seed with Trichoderma at 4 g/kg just before sowing (do not also use fungicides). Treat the seed for one hectare with 600 g each of Azospirillum and phosphobacteria (or 600 g Azophos) using rice gruel, shade-dry for 30 minutes and sow immediately.

  Pending expert review

  Source

  Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Sunflower – Seed treatment, p. 218

  Region

  Tamil Nadu

  Last updated

  2026-11-04

• Seed treatment with fungicide; storing seed

  Alternatively, treat seed with carbendazim or thiram at 2 g/kg, 24 hours before sowing. Seed dried to 8–9% moisture, treated with thiram at 2 g/kg and packed in polythene-lined cloth bags can be stored for up to 9 months with 70% germination.

  Follow the instructions on the product label. Consult your local Agriculture Officer before use.

  Pending expert review

  Source

  Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Sunflower – Seed treatment (ii, vi), p. 218

  Region

  Tamil Nadu

  Last updated

  2026-11-04