Chemical Class and Photo-Activated Mode of Action
Diafenthiuron belongs to the thiourea chemical class (IRAC Group 12A - Mitochondrial ATP synthase inhibitors). Following foliar application, sunlight and ultraviolet radiation photo-activate Diafenthiuron into its carbodiimide derivative.
This active metabolite binds to the ATP synthase complex inside insect and mite mitochondria, shutting down cellular ATP energy synthesis. Target pests cease feeding within hours of exposure, becoming paralyzed and dying within 24 to 48 hours.
- IRAC Group 12A Mode of Action: Photo-activated shutdown of mitochondrial ATP synthesis.
- Dual Insecticide & Miticide: Simultaneously controls phloem-sucking insects and phytophagous mites.
- Formulation Type: Wettable Powder (50% WP) providing a tenacious, weather-resistant foliar film.
Target Pests and Labeled Field Crops
Hercules is officially registered under CIBRC standards for controlling critical insect complexes in cotton, cabbage, chilli, brinjal, and cardamom. In cotton, it manages whiteflies (Bemisia tabaci), jassids, aphids, and thrips.
In cruciferous vegetables, it controls diamondback moth (Plutella xylostella) caterpillars, while in chilli and cardamom, it controls yellow and red spider mites, preventing leaf cupping and flower abortion.
- Cotton Sucking Complex: Simultaneous control of whiteflies, jassids, and aphids.
- Diamondback Moth (DBM) Control: Overcomes DBM caterpillars resistant to legacy synthetic pyrethroids.
- Miticidal Efficacy: Curbs destructive spider mite colonies in chilli and brinjal crops.
Application Guidelines and Sunlight Activation
Because Diafenthiuron requires light to convert into its active carbodiimide form, apply Hercules during morning hours on clear, sunny days. Ensure high water volume using calibrated knapsack sprayers fitted with hollow cone nozzles.
Thoroughly wet both upper and lower leaf surfaces. To prevent resistance development, alternate Hercules with insecticides featuring distinct modes of action (such as Flonicamid or Spiromesifen).
- Sunny Weather Application: Best sprayed on clear days to accelerate photochemical activation.
- Thorough Canopy Wetting: Direct spray mist into the inner canopy where whiteflies and mites shelter.
- Pre-Harvest Interval (PHI): Observe recommended harvest waiting windows as prescribed on the product label.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the technical ingredient in Hercules insecticide?
Hercules contains Diafenthiuron 50% WP (Wettable Powder), manufactured by Rallis India.
How does sunlight activate Diafenthiuron?
Sunlight and UV rays convert Diafenthiuron into an active carbodiimide derivative that blocks ATP energy synthesis in insect mitochondria.
Which major pests does Hercules control in cotton?
It controls sucking pests including whiteflies, aphids, jassids, and thrips, as well as spider mites.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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