Active Substance and Mode of Action
The ammonium salt of glyphosate is readily absorbed by green foliage and translocated through the phloem to growing meristems, rhizomes, and root systems. It inhibits the plant 5-enolpyruvylshikimate-3-phosphate (EPSP) synthase enzyme, halting the production of essential aromatic amino acids.
Because of complete systemic movement, it prevents vegetative regeneration from underground root crowns and stolons.
- Target weeds: Difficult perennial grasses (Cynodon dactylon, Sorghum halepense), sedges (Cyperus spp.), and tough brushwood.
- Systemic translocation: Moves downward to underground tubers and roots, preventing rapid vegetative re-growth.
- Rainfastness: Best applied with clean soft water during active weed growth with at least 4 to 6 hours of rain-free conditions.
Regulatory Restrictions and Safe Spraying
In India, Central Insecticides Board regulations strictly govern glyphosate use. It must never be sprayed over active food crops or standing horticultural plants without shielded protective hoods.
Proper spray water management is crucial because turbidity neutralizes the active salt before it reaches plant cells.
- Use protective spray hoods to eliminate drift onto desirable crops, green bark, or border flora.
- Wear complete protective clothing, chemical-resistant gloves, and goggles during spray mixing and application.
- Never utilize muddy or turbid canal water, as suspended soil particles immediately deactivate the glyphosate molecule.
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 ↗Related on KisanPe
Common questions
What is the active ingredient in Mera 71?
Mera 71 contains Ammonium salt of Glyphosate 71% SG (soluble granules), a systemic broad-spectrum non-selective herbicide.
Can Mera 71 be sprayed in standing paddy or wheat fields?
No, Mera 71 is non-selective and will destroy standing food crops. It is restricted to non-crop land, bund preparation, or directed plantation care.
Why does glyphosate require clean water for dilution?
Glyphosate binds tightly to suspended silt and clay particles in turbid water, which neutralizes the chemical before it can penetrate weed leaves.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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