Ruler 5% SC Insecticide (Fipronil) by Krishi Rasayan
The Ultimate Solution for Stem Borers, Thrips, and Sucking Pests in Rice, Cotton, and Vegetables.
Ruler 5% SC is a high-performance, broad-spectrum insecticide formulated by Krishi Rasayan Exports Pvt. Ltd. It features Fipronil in a modern Suspension Concentrate (SC) liquid formulation. Unlike older powders or harsh solvent-based liquids, Ruler provides a "smooth" application that is safe for your crops while being deadly to pests. It acts as a nerve poison to stop pests instantly, offering distinct control over internal feeders like Stem Borers in paddy and tough sucking pests like Thrips in chilli and cotton.
Why Choose This Product? Key Benefits
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Dual Action Power: Works through both Contact (touch) and Ingestion (stomach) action, ensuring pests die whether they touch the leaf or eat it.
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Systemic Protection: The medicine is absorbed by the plant and moves inside the stem, effectively killing hidden pests like Stem Borers and Root Borers that surface sprays cannot reach.
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Long-Lasting Residual Control: It stays active on the leaf surface for weeks, reducing the need for frequent re-spraying and saving you labor costs.
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Superior Rainfastness: The advanced SC formulation sticks better to leaves than traditional powders, ensuring it isn't easily washed away by light rains.
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Crop Safe (Phytotoxicity Free): Water-based formula contains no harsh solvents (like xylene), making it safe for tender leaves, flowers, and seedlings without causing burning or stress.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Ruler |
| Technical Name | Fipronil 5% SC |
| IRAC MoA Code | Group 2B (GABA-gated chloride channel blockers) |
| Chemical Group | Phenylpyrazole |
| Formulation | Suspension Concentrate (SC) |
| Toxicity Label | Moderately Hazardous (Yellow Triangle) |
How It Works: Mode of Action
- Targeting the Nerves: Ruler targets the Central Nervous System of the insect. It specifically acts on the GABA-gated chloride channels.
- Blocking the Signal: Under normal conditions, GABA "calms" the nerves. Ruler blocks this calming effect, preventing chloride ions from entering the nerve cells.
- Hyperexcitation & Death: Without the calming signal, the insect's nerves fire uncontrollably. This leads to severe tremors, paralysis, and rapid death of the pest.
This unique mode of action makes it an excellent tool for managing pests that have developed resistance to other chemical groups.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Paddy) | Stem Borer, Brown Plant Hopper (BPH), Green Leaf Hopper, Leaf Folder, Gall Midge, Whorl Maggot |
| Cotton | Aphids, Jassids, Thrips, Whitefly, Bollworms |
| Sugarcane | Early Shoot Borer, Root Borer |
| Chilli | Thrips, Aphids, Fruit Borers |
| Cabbage | Diamondback Moth (DBM) |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Rice (Paddy) | 400 - 600 ml | 200 L | 2 - 3 ml | 32 |
| Cotton | 600 - 800 ml | 200 L | 3 - 4 ml | 6 |
| Sugarcane | 600 - 800 ml | > 200 L | Drenching | 270 (9 Months) |
| Chilli | 320 - 400 ml | 200 L | 1.5 - 2 ml | 7 |
| Cabbage | 320 - 400 ml | 200 L | 1.5 - 2 ml | 7 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: In Rice, apply 25-30 days after transplanting for best control of stem borers. For other crops, apply when pests first appear.
- Mixing: Shake the bottle well before use. Add the required quantity to a little water, mix well, and then add the remaining water volume.
- Coverage: Ensure uniform coverage of the foliage. For hoppers, target the base of the plant. For Sugarcane, use as a soil drench or directed spray at the base.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Do not spray near fish ponds or aquaculture areas.
Frequently Asked Questions
1. Can I use Ruler 5% SC in paddy fields with fish?
No. Fipronil is toxic to fish and aquatic life. Do not use Ruler in fields that practice rice-fish farming or where water drains into fish ponds.
2. Does Ruler control "Dead Heart" in Rice?
Yes. "Dead Heart" is caused by Stem Borers. Ruler is highly effective against Stem Borers and prevents this symptom if applied at the right time (25-30 days after transplanting).
3. Is Ruler effective against Thrips?
Yes, it is a specialist solution for Thrips, especially in Chilli and Cotton. It helps prevent leaf curling caused by these pests.
4. What is the difference between Ruler SC and other powders?
Ruler SC is a liquid Suspension Concentrate. It is water-based, safer for the plant (no burn), mixes easier, and has better rainfastness (sticks better) compared to older powders or dusts.
5. When can I harvest my crop after spraying?
It depends on the crop. For Cotton, wait 6 days. For Chilli/Cabbage, wait 7 days. For Rice, you must wait at least 32 days. See the dosage table for details.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Use personal protective equipment (PPE) during application.
