
Clasto Insecticide
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Clasto Insecticide (Pyrifluquinazon 20% WG): The Ultimate Sucking Pest Solution
Stop Whiteflies and Aphids instantly with the power of novel Japanese chemistry.
Clasto Insecticide, brought to you by Rallis India (a Tata Enterprise), is a breakthrough solution designed to fight stubborn sucking pests. Powered by Pyrifluquinazon 20% WG, it doesn't just kill pests—it immediately stops them from feeding. This unique action protects your high-value crops like Cotton and Chilli from viral diseases like Leaf Curl Virus, ensuring higher yields and better quality.
Best For: Breaking resistance in Whiteflies, Aphids, and Jassids when older chemicals fail.
Why Choose Clasto Insecticide? Key Benefits
- ⏱️Stops Feeding Instantly: Pests stop damaging the crop immediately upon contact, preventing "Hopper Burn" and yield loss.
- ?️Blocks Virus Spread: By halting feeding rapidly, Clasto prevents Whiteflies from transmitting deadly viruses like CLCuV and ChiLCV.
- ⏳Long-Lasting Protection: Enjoy peace of mind with extended residual control that lasts for 14 to 21 days after spraying.
- ?️Translaminar Action: The medicine penetrates the leaf surface to kill pests hiding on the underside, where normal sprays can't reach.
- ?Safe for Friendly Insects: Ideally suited for IPM, it harms pests but is safer for beneficial insects like predatory mites and wasps.
Clasto Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Clasto Insecticide (Rallis India) |
| Technical Name | Pyrifluquinazon 20% WG |
| IRAC MoA Code | Group 9B (Chordotonal Organ Modulator) |
| Chemical Group | Quinazolinone (Pyridine azomethine) |
| Formulation | WG (Water Dispersible Granules) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action (IBR)
Clasto works differently than older poisons. It acts as an Insect Behavior Regulator (IBR).
[Image of insect nervous system diagram]- The "Stop" Effect: Upon contact, the chemical affects the pest's "Chordotonal Organs" (sensory system). The insect immediately withdraws its mouthpart and stops feeding.
- The "Drop" Effect: The pest loses coordination, becomes dizzy, and cannot hold onto the leaf, often falling off the plant.
- The "Starve" Effect: Because they cannot eat, the pests die from starvation and dehydration within 1 to 3 days.
Note: You might still see pests on the leaf for a day, but they are harmless because they have stopped feeding.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Cotton | Whitefly (Bemisia tabaci), Aphids, Jassids |
| Chilli | Whitefly, Aphids, Thrips (Suppression) |
| Vegetables (Tomato, Brinjal) | Whitefly (Virus Vector), Jassids |
Clasto 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) |
|---|---|---|---|---|
| Cotton | 200 g | 200 L | 1.0 g | 21 Days |
| Chilli | 200 g | 200 L | 1.0 g | 7-14 Days* |
| Vegetables | 200 g | 200 L | 1.0 g | 7-14 Days* |
*PHI = Pre-Harvest Interval: Check local label for specific export vegetable PHI.
How to Apply: Best Practices
- Timing: Apply at the first sign of pest activity (ETL) or when you see "leaf curling." Early application prevents viral spread.
- Mixing: Premix the granules in a bucket of water before adding to the main tank. It mixes easily and creates a stable suspension.
- Coverage: Use Hollow Cone Nozzles and ensure 200 Liters of water per acre to cover the undersides of leaves where Whiteflies hide.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid spraying during peak bee foraging hours.
Frequently Asked Questions
1. What is the price of Clasto Insecticide?
The approximate market price is ₹2,100 to ₹2,225 for a 200g pack (one acre dose). While premium, it saves crops when cheaper alternatives fail.
2. Does Clasto kill the pests immediately?
It stops them from feeding instantly (saving your crop), but the actual death happens over 1-3 days due to starvation.
3. Can I mix Clasto with other fungicides?
Yes, Clasto is generally compatible with most neutral insecticides and fungicides. Avoid mixing with highly alkaline products like Bordeaux Mixture.
4. Does it work on resistant Whiteflies?
Yes! Clasto is specifically designed to control Whiteflies that have developed resistance to Imidacloprid and Acetamiprid.
5. Is Clasto safe for flowers?
The WG formulation is safer for crops during flowering than EC sprays, but avoid direct spraying on bees.
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. Do not use near aquaculture (fish ponds).

