Nichino Crux Insecticide (Thiamethoxam 25% WG)
The Ultimate Systemic Solution for Sucking Pests & Crop Vigor
Crux by Nichino India is a broad-spectrum systemic insecticide containing Thiamethoxam 25% WG. It is designed to control tough sucking pests like Brown Plant Hoppers (BPH), Whiteflies, and Aphids in Rice, Cotton, and Vegetables.
Advanced WG Formulation: Unlike older liquid poisons, Crux comes in high-quality Water Dispersible Granules. This makes it safer to handle, easy to mix, and highly effective at penetrating plant tissues for long-lasting protection.
Why Choose Crux? Key Benefits
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Rapid Action: Quickly absorbs into the plant system to stop pests from feeding within hours.
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Systemic Protection: Moves upward in the plant (Xylem mobile) to protect new leaves and hidden parts.
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Long Duration Control: Provides extended protection against re-infestation, reducing the need for frequent sprays.
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Rainfastness: Absorbs quickly and is resistant to wash-off by rain within 2-3 hours of application.
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Phytotonic "Vigor" Effect: Makes plants greener and healthier by reducing stress and improving root development.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Crux |
| Technical Name | Thiamethoxam 25% WG |
| IRAC MoA Code | Group 4A (Neonicotinoid) |
| Chemical Group | Thianicotinyl |
| Formulation | Water Dispersible Granules (WG) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Crux targets the central nervous system of insects. It mimics Acetylcholine, permanently binding to receptors and causing over-excitation.
- Systemic Absorption: Applied to leaves or soil, it is rapidly absorbed and moves via the Xylem to all plant parts.
- Anti-Feedant Shock: Once the insect ingests the sap, they stop feeding almost immediately, preventing further crop damage.
- Total Elimination: The nervous system failure leads to paralysis and death of the pest within 24-48 hours.
Note: It also works via "Translaminar" action, penetrating the leaf to kill pests hiding on the underside.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Paddy) | Brown Plant Hopper (BPH), Green Leaf Hopper (GLH), Stem Borer |
| Cotton | Jassids, Aphids, Thrips, Whiteflies |
| Vegetables (Tomato, Brinjal, Okra) | Whiteflies, Aphids, Jassids |
| Tea & Mango | Tea Mosquito Bug, Mango Hoppers |
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 (gm / Acre) | Water (L / Acre) | Dose (gm / Litre) | PHI (Days) |
|---|---|---|---|---|
| Rice | 40 - 80 g | 200 L | 0.2 - 0.4 g | 14 Days |
| Cotton | 40 - 80 g | 200 L | 0.2 - 0.4 g | 21 Days |
| Tomato / Brinjal / Okra | 40 - 80 g | 200 L | 0.2 - 0.4 g | 3 - 5 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Note: Dosage refers to grams as this is a Granule product.
How to Apply: Best Practices
- Timing: Apply at the first sign of pest infestation (ETL). Avoid spraying during full bloom to protect bees.
- Mixing: Dissolve the granules in a small quantity of water first, then add to the main tank. It dissolves easily.
- Coverage: Ensure thorough coverage of foliage. The chemical will travel inside the plant, but good coverage ensures faster uptake.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Do not use near fish ponds.
Frequently Asked Questions
1. Does Crux control caterpillars/borers?
Crux is primarily for sucking pests (Hoppers, Aphids, Whiteflies). While it helps suppress Rice Stem Borers, it is not a dedicated caterpillar killer.
2. What is the "Vigor Effect"?
Crux stimulates plant roots and stress-defense genes. Even if pest pressure is low, you will often see greener leaves, thicker stems, and better growth after spraying.
3. Can I use Crux on export vegetables?
Yes, but strictly follow the PHI (3-5 days for Tomato/Brinjal). Check specific export market regulations regarding Thiamethoxam residues (MRLs) before use.
4. Is it safe for honeybees?
No. Thiamethoxam is toxic to bees. Do not spray during active flowering times or when bees are foraging. Spray in the late evening.
5. Can I mix other chemicals with Crux?
Crux is generally compatible with most fungicides and insecticides. However, always perform a small jar test before mixing large quantities. Avoid highly alkaline mixtures.
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. Rotate with different chemical groups to prevent pest resistance.
