Active Ingredient and Photo-Conversion Mode of Action
Diafenthiuron belongs to the thiourea chemical class (IRAC Group 12A), functioning as an inhibitor of mitochondrial ATP synthase.
Upon exposure to sunlight on treated plant leaves, diafenthiuron undergoes rapid photochemical conversion into its active carbodiimide derivative, which shuts down cellular respiration in targeted pests.
- Active Molecule: Diafenthiuron 50% WP (Wettable Powder)
- Photo-Activation: Sunlight accelerates the transformation of parent diafenthiuron into its high-affinity insecticidal form
- ATP Synthase Inhibition: Paralyzes cellular respiration, causing insect and mite paralysis within hours
- Vapor & Contact Action: Mild translaminar and vapor phase activity that reaches pests concealed on the undersides of curled leaves
Target Pests and Crop Defense
Polo is recognized across major commercial cash crops and vegetables for controlling stubborn sucking pest complexes.
In cotton and chilli, it delivers proven control against whiteflies and mites that have developed resistance to organophosphates and pyrethroids.
- Cotton: Whiteflies (Bemisia tabaci), jassids, aphids, and two-spotted spider mites
- Chilli: Yellow mites (Polyphagotarsonemus latus) and chilli thrips (Scirtothrips dorsalis) resolving leaf curl syndrome
- Brinjal & Vegetables: Red spider mites and whitefly nymph complexes
- Cardamom & Tea: Thrips and red spider mites damaging plantation flushes
Application Guidelines and Sunny Weather Requirement
For maximum efficacy, apply Polo on clear sunny days; sunlight is required to photo-activate the active ingredient on leaf surfaces.
Ensure high spray volume with hollow cone nozzles to thoroughly coat both upper and lower leaf surfaces.
- Sunny Application: Spray on bright mornings; avoid spraying under heavy overcast skies or imminent rainfall
- Water Volume: Apply with 200 liters of water per acre for thorough canopy wetting
- Tank Mixing: Compatible with most neutral agrochemicals; avoid mixing with strongly alkaline spray solutions
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the technical ingredient in Syngenta Polo?
Polo contains diafenthiuron 50% WP, a thiourea mitochondrial ATP synthase inhibitor.
Why is sunny weather recommended when spraying Polo?
Sunlight accelerates the photochemical conversion of diafenthiuron into its active carbodiimide derivative on plant foliage.
Does Polo control yellow mites in chilli?
Yes, Polo has strong acaricidal properties and is widely recommended for controlling yellow mites and thrips causing chilli leaf curl.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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