Major insecticide chemical classes and active ingredients
Insecticides are grouped scientifically according to their biochemical target within the pest.
Primary chemical classes approved in India:
- Organophosphates (IRAC Group 1B): Technical names include Chlorpyrifos, Profenofos, Monocrotophos, and Dimethoate; acts via acetylcholinesterase inhibition.
- Synthetic Pyrethroids (IRAC Group 3A): Technical names include Cypermethrin, Deltamethrin, Lambda-cyhalothrin, and Fenpropathrin; acts via axonal sodium channel modulation.
- Neonicotinoids (IRAC Group 4A): Technical names include Imidacloprid, Thiamethoxam, and Acetamiprid; acts via nicotinic acetylcholine receptor agonism.
- Anthranilic and Phthalic Diamides (IRAC Group 28): Technical names include Chlorantraniliprole and Flubendiamide; activates ryanodine receptors causing feeding cessation.
- Avermectins and Spinosyns (IRAC Groups 5 & 6): Technical names include Emamectin Benzoate and Spinosad; activates glutamate-gated chloride channels.
Technical active ingredient versus trade brand names
Farmers must distinguish between the active chemical name and commercial branding:
Key identification principles:
- Active ingredient identification: Printed clearly on every container label alongside its percentage concentration and formulation type (such as EC, SC, WG, SP, or SL).
- Avoiding repetitive spraying: Multiple commercial brands frequently contain the identical active ingredient; alternating brand names without changing the chemical class accelerates pest resistance.
- Toxicity triangles: Every registered insecticide features a statutory color-coded diamond (Red: Extremely Toxic, Yellow: Highly Toxic, Blue: Moderately Toxic, Green: Slightly Toxic).
- Target specificity: Selecting active ingredients specifically registered for the target pest ensures efficient control and avoids unnecessary broad-spectrum chemical exposure.
Resistance rotation and safe handling protocols
To sustain chemical efficacy over multiple seasons, growers should follow IRAC 'window' application strategies, rotating through distinct mode-of-action numbers rather than repeating the same class. Always verify CIBRC registration numbers on packaging, wear complete PPE during mixing and spraying, and observe mandatory pre-harvest intervals.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
Why is it important to know an insecticide's technical name rather than just the brand name?
Different commercial brands often contain the same technical active ingredient; rotating by technical class prevents pest resistance.
What do the color-coded toxicity triangles on insecticide containers indicate?
They indicate mammalian toxicity levels: Red (Extremely Toxic), Yellow (Highly Toxic), Blue (Moderately Toxic), and Green (Slightly Toxic).
What is the IRAC classification system?
The Insecticide Resistance Action Committee (IRAC) assigns numeric codes to insecticides based on their mode of action to help farmers rotate chemical groups.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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