Metryne – Metsulfuron Methyl 20% WP
Metryne is a herbicide manufactured by MaxxGro Agrology Limited, containing Metsulfuron Methyl 20% as a wettable powder (WP) formulation. It is used for the post-emergence control of broad-leaved weeds such as Chenopodium album, Melilotus indica, Lathyrus aphaca, Anagallis arvensis, Vicia sativa and Cirsium arvense in wheat. Metsulfuron methyl is a systemic sulfonylurea herbicide, typically applied together with a recommended non-ionic surfactant.
Metsulfuron Methyl 20% WP is also registered for use in transplanted rice and sugarcane. As a wettable powder, Metryne is mixed with water before spray application, and should be used strictly as per the crop, dose, timing and weed recommendations on the approved product label.
| CROP | Common Name of Pest | Dosage / Acre | Dilution in Water (L/acre) | Waiting Period (Days) |
| Wheat (add surfactant: iso-octyl phenoxy polyethoxy ethanol 12.5% at 202 ml per acre) | Chenopodium album, Melilotus indica, Lathyrus aphaca, Anagallis arvensis, Vicia sativa, Cirsium arvense | 1.62 g A.I.
8.09 g formulation |
202-243 | 80 |
| Rice (transplanted) | Cyperus rotundus, Sphenoclea spp., Fimbristylis sp., Ludwigia parviflora, Marsilea quadrifoliata | 1.62 g A.I.
8.09 g formulation |
202-243 | 60 |
- Contains Metsulfuron Methyl 20% as the active ingredient
- Formulated as a Wettable Powder (WP)
- Herbicide category product for weed management
- Registered use in wheat, among other listed crops
- Controls a range of broad-leaved weeds
- Systemic, ALS-inhibiting mode of action
Metsulfuron methyl is a sulfonylurea herbicide that inhibits the acetolactate synthase (ALS) enzyme, which is required for the biosynthesis of branched-chain amino acids in plants. This inhibition halts cell division and growth, leading to the gradual death of susceptible broad-leaved weeds. Metsulfuron methyl is classified under HRAC/WSSA Group 2 (ALS inhibitors).
Metryne (Metsulfuron Methyl 20% WP) is mixed with the recommended volume of water, together with the label-specified non-ionic surfactant, and applied as a post-emergence foliar spray in wheat, using standard knapsack or boom sprayers, following the approved product label.
- Use strictly as per the directions on the approved product label
- Wear appropriate personal protective equipment during mixing and spraying
- Avoid spray drift onto sensitive or non-target crops
- Keep out of reach of children and away from food, feed, and water sources
- Store in a cool, dry place in original packaging
