Fipronil 5% SC: Complete Guide to Uses, Dosage & Termite Control (2026)
Most insecticides repel insects — they sense the chemical and move away. Fipronil doesn't work that way. Insects cannot detect it. They walk right through it, pick it up on their bodies, carry it back to the colony, and share it with every insect they contact. It's essentially self-distributing. For termite control, this is the most important property an insecticide can have — and it's why Fipronil has become the global standard for termite management.
Fipronil 5% SC is a broad-spectrum insecticide that operates by a completely different mechanism from organophosphates and neonicotinoids, making it one of the most valuable tools in resistance management programmes.
What is Fipronil 5% SC?
Fipronil is a phenylpyrazole insecticide — a chemical class completely distinct from organophosphates, carbamates, pyrethroids, and neonicotinoids. The "5% SC" refers to 5% active ingredient in a Suspension Concentrate formulation.
Key characteristics:
- Non-repellent — insects cannot detect it, so they don't avoid treated areas
- Slow-acting by design — insects remain mobile for 1–3 days after contact, long enough to spread the product to nestmates (critical for social insects like termites)
- Contact, stomach and moderate systemic activity
- Soil persistent — provides months of residual protection in soil applications
- Mode of action entirely different from all common insecticide classes — no cross-resistance with organophosphates, pyrethroids, carbamates, or neonicotinoids
How Does Fipronil Work?
Fipronil blocks GABA-gated chloride channels in the insect nervous system. GABA is an inhibitory neurotransmitter — it normally reduces nerve firing. When Fipronil blocks these channels, the inhibitory signal can't get through. The insect's nervous system goes into uncontrolled excitation, leading to convulsions, paralysis, and death.
This GABA-receptor mechanism is completely different from:
- Organophosphates (inhibit acetylcholinesterase)
- Neonicotinoids (activate nicotinic acetylcholine receptors)
- Pyrethroids (disrupt sodium channels)
This means Fipronil is effective against insect populations that have developed resistance to all three of those classes — making it a critical tool when other insecticides stop working.
Pests Fipronil 5% SC Controls
| Pest | Crops / Application |
|---|---|
| Termites (all species) | Sugarcane, cotton, groundnut, soil treatment |
| White grubs | Sugarcane, groundnut, potato |
| Yellow stem borer | Paddy (rice) |
| Brown Plant Hopper (BPH) | Paddy |
| Leaf folder | Paddy |
| Thrips | Chilli, onion, cotton |
| Aphids | Cotton, vegetables |
| Diamond back moth (DBM) | Cabbage, cauliflower |
| Root borers | Sugarcane, maize |
| Cutworms | Vegetables, maize |
The standout application is termite control in sugarcane. Termite infestation can cause 20–40% stand loss in sugarcane — a devastating economic impact. Fipronil's non-repellent, slow-acting, and colony-spreading properties make it dramatically more effective than repellent insecticides for this purpose.
Fipronil 5% SC Dosage Chart
| Crop / Use | Pest | Dose | Method |
|---|---|---|---|
| Paddy | Stem borer, BPH, leaf folder | 400–500 mL/acre in 150–200 L water | Foliar spray |
| Sugarcane | Termites, white grubs, root borers | 400–500 mL/acre | Soil drench at planting; furrow application |
| Cotton | Termites, aphids, thrips | 400 mL/acre | Foliar or soil |
| Groundnut | White grubs, termites | 500 mL/acre | Soil incorporation at sowing |
| Cabbage / Cauliflower | DBM, cutworms | 300–400 mL/acre | Foliar spray |
| Structural termite treatment | Termites | 50 mL in 10–15 L water per metre | Soil drenching around foundation |
| General foliar | Broad-spectrum | 2–4 mL/L water | Foliar spray |
Application Tips
- For termite control: apply to the soil, not the plant. The most effective termite control is a thorough soil treatment around the root zone or in planting furrows. Foliar sprays don't reach termites in the soil.
- Don't disturb treated soil for 24–48 hours. Irrigation or soil disturbance immediately after application can reduce efficacy by displacing the treated soil layer before termites contact it.
- For paddy stem borer: spray at egg hatching stage. Young larvae are far more susceptible than mature ones. Field scouting to identify the egg-hatching timing maximises efficacy.
- Slow kill is intentional. Fipronil takes 24–72 hours to kill — this is by design, allowing social insects to spread the product through colonies. Do not re-spray if you see live insects within 48 hours.
- Highly toxic to fish and aquatic organisms. Do not apply near water bodies, ponds, or drainage channels. Apply only on dry days with no expected run-off.
Fipronil 5% SC Price in India (2026)
- 250 mL: ₹280–₹380
- 500 mL: ₹520–₹680
- 1 litre: ₹950–₹1,200
Buy Fipronil 5% SC on Farmkart with cash on delivery available across India.
Frequently Asked Questions
Q: Is Fipronil safe for bees?
A: Fipronil is highly toxic to bees. Do not spray on flowering crops during bee activity hours. Several countries have restricted Fipronil use outdoors due to bee toxicity. In India, it remains registered but apply with caution near pollinating crops.
Q: How long does Fipronil remain active in soil?
A: Soil half-life is typically 125–200 days under Indian field conditions — much longer than most other insecticides. This is what gives it excellent residual protection for soil pests.
Q: Can I mix Fipronil with fungicides?
A: Compatible with most fungicides. Commonly tank-mixed with Mancozeb or Copper Oxychloride for combined pest and disease management. Always do a jar test.
Q: Why is Fipronil effective when other insecticides have stopped working on termites?
A: Most termite resistance in India is to organophosphates and pyrethroids — Fipronil's GABA-receptor mechanism is completely different, so there is no cross-resistance. Additionally, its non-repellent property ensures termites are actually exposed to it rather than avoiding treated zones.
