Chemical Profile and Photosystem II Inhibition
Ametryn belongs to the symmetrical triazine chemical class. It is formulated as an eighty percent water-dispersible granule (WG).
It works by binding to the D1 protein of photosystem II in plant chloroplasts, disrupting electron transport. Without photosynthetic energy, susceptible weeds experience chlorosis, desiccation, and rapid death.
- Formulation: 80 percent Water Dispersible Granules (WG)
- Uptake route: Absorbed through both weed foliage and root systems from moist soil
- Selectivity: High tolerance in established sugarcane when applied in accordance with registered directions
Target Weeds and Application Strategy in Sugarcane
Ametryn provides both contact knockdown on emerged seedling weeds and residual soil activity against emerging weed flushes.
It is deployed as an early post-emergence spray when annual grasses and broadleaf weeds are at the two to four leaf stage.
- Broadleaf weed control: Controls Amaranthus, Portulaca, Chenopodium, and Commelina species
- Annual grasses: Suppresses Echinochloa, Digitaria, and Eleusine indica grasses
- Directed spray: Directed spraying between cane rows minimizes foliar contact with young sugarcane leaves
Spraying Directions and Soil Moisture Considerations
Optimal herbicidal performance requires adequate soil moisture to facilitate root uptake of the residual component.
Use floodjet or flat fan nozzles to achieve uniform surface coverage and prevent drift onto sensitive non-target broadleaf crops.
- Soil condition: Apply after irrigation or rain when soil is moist but not waterlogged
- Nozzle selection: Low-pressure flat fan nozzles reduce fine mist drift to adjacent sensitive crops
- Operator safety: Wear protective rubber boots, nitrile gloves, and safety goggles during preparation
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What type of herbicide is Ametryn 80 WG?
Ametryn 80 WG is a selective triazine herbicide that inhibits photosystem II in broadleaf weeds and annual grasses.
In which crop is Ametryn predominantly used in India?
It is predominantly registered and applied for selective weed control in sugarcane crops.
Does Ametryn act through roots or leaves?
Ametryn is absorbed through both green foliage and plant root systems, offering contact and residual action.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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