Gharda Appu Insecticide (Pymetrozine 50% WG)
The Ultimate "Starvation" Solution for Brown Plant Hoppers and Sucking Pests.
Gharda Appu is a specialized systemic insecticide designed to stop sucking pests like the Brown Plant Hopper (BPH) and Whitefly. Unlike older poisons that cause immediate knockdown, Appu uses advanced "Green Chemistry" to instantly lock the pest's mouthparts, causing them to stop feeding immediately and die of starvation. It is the gold standard for protecting Paddy, Cotton, and Vegetables while keeping friendly insects safe.
Best For: Farmers facing BPH resistance or "hopper burn" in rice, and Whitefly issues in cotton and vegetables.
Why Choose This Product? Key Benefits
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Immediate Damage Control: Pests stop feeding within minutes of contact. Even if they are still moving, they cannot damage your crop or spread viruses.
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Long-Lasting Protection: Provides 14 to 21 days of residual protection, reducing the need for frequent spraying.
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No Pest Resurgence: Because it spares friendly predators (like spiders and ladybugs), pests do not bounce back in higher numbers after spraying.
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Systemic Action: Moves upward within the plant (xylem-mobile) and through the leaf (translaminar) to reach pests hiding on the underside of leaves.
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Export Safety: Safe for use on Basmati rice intended for export (EU/USA compliant) if the Pre-Harvest Interval (PHI) is followed.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Appu |
| Technical Name | Pymetrozine 50% WG |
| IRAC MoA Code | Group 9B (Chordotonal Organ Modulator) |
| Chemical Group | Pyridine Azomethine |
| Formulation | Water Dispersible Granules (WG) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Appu works differently than standard poisons. It targets the nervous system responsible for the insect's feeding mechanism.
- Contact & Ingestion: The pest absorbs the chemical by touching the leaf or sucking the sap.
- Instant Lock-Jaw: The chemical blocks the signals to the "cibarial pump" (the insect's throat). The pest withdraws its needle (stylet) and cannot insert it again.
- Starvation: Although the pest may walk around for 2-4 days, it cannot eat or lay eggs efficiently. It eventually dies of starvation.
Note: Do not expect pests to drop dead instantly. Check the crop condition—if the damage has stopped, the product is working.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Paddy) | Brown Plant Hopper (BPH), Green Leaf Hopper (GLH), White Backed Plant Hopper (WBPH) |
| Cotton | Aphids, Jassids, Whitefly |
| Vegetables (Tomato, Chili, Potato) | Aphids, Whitefly |
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 (g / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Rice (Paddy) | 120 - 160 g | 150 - 200 L | 0.8 g | 19 - 21 |
| Cotton | 120 - 150 g | 200 L | 0.6 - 0.75 g | - |
| Vegetables | 80 - 100 g | 150 - 200 L | 0.5 g | 3 - 7 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply when you see 5-10 hoppers per hill (Economic Threshold Level). The best window is usually during the booting stage.
- Mixing: Do not mix with highly alkaline products like Bordeaux mixture or Lime Sulfur. It is compatible with most common fungicides like Propiconazole.
- Coverage: For Rice BPH, the pest lives at the base of the plant. Use a high water volume (150-200 Litres/acre) and aim the nozzle towards the stem/water level.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Why are the pests still moving after spraying?
Appu works by "starvation," not instant paralysis. The pests stop feeding immediately (stopping damage), but they may walk around for 2-4 days before dying. This is normal.
2. Is Appu safe for spiders and natural enemies?
Yes, Appu is highly selective. It kills the hoppers but saves beneficial insects like wolf spiders, mirid bugs, and lady beetles. This helps prevent pest resurgence.
3. Can I use Appu on Basmati Rice for export?
Yes, Appu has established MRLs in the EU and USA. Stop spraying 20 days before harvest (observe PHI) to ensure residue compliance.
4. Can I mix Appu with other chemicals?
Yes, it is generally compatible with common fungicides and insecticides (like OMG/Chlorantraniliprole for leaf folders). However, avoid mixing with strong alkaline chemicals.
5. What is the shelf life of the solution?
The WG granules disperse quickly. Use the spray solution immediately after mixing. Do not store the mixed liquid overnight.
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. Appu is toxic to fish; avoid using in rice-fish culture systems and prevent runoff into water bodies.
