Proper seed treatment is one of the most cost-effective interventions in groundnut cultivation — yet consistently overlooked. A well-treated seed shows 15–25% better germination in field trials.
Why Seed Treatment Matters
Groundnut seeds have a thin seed coat that makes them vulnerable to soil-borne pathogens during germination. Seed treatment creates a protective shield during the first 3–4 weeks — exactly when the plant is most vulnerable.
The 3-Step Protocol
Step 1: Fungicide Treatment (Day 2 before sowing)
Treat seeds with Thiram 75 WP at 3 g/kg of seed, or Carbendazim 50 WP at 2 g/kg. Mix thoroughly to coat all seeds — protects against collar rot, stem rot, and seed-borne fungi.
Step 2: Rhizobium Inoculation (Day 1 before sowing)
Apply Rhizobium japonicum culture at 25 g/kg of seed using 5% jaggery solution as adhesive. Improves nitrogen fixation — reducing N-fertiliser requirement by 20–30 kg/ha.
Important: Always apply Rhizobium AFTER fungicide — never mix them, as fungicides kill the beneficial bacteria.
Step 3: Phosphate Solubilising Bacteria (Day 1 before sowing)
Apply PSB culture at 25 g/kg along with Rhizobium. Helps solubilise fixed phosphorus in soil during pod fill — the most phosphorus-hungry stage.
Expected Results
| Parameter | Untreated | Treated |
|---|---|---|
| Germination % | 75–80% | 90–95% |
| Early Disease Incidence | High | Low |
| N-Fertiliser Saving | None | 20–30 kg/ha |