Dhanuka Barrier Metribuzin 70% WP Selective Herbicide

• Verified five-crop scope: the Indian major-use table publishes crop-specific directions.
• Mixed weed spectrum: the registered lists include annual grasses, broadleaf weeds and selected sedges; control is limited to the weeds named for each crop.
• Root and leaf uptake: Metribuzin can act through treated soil or emerged foliage according to the labelled application window.
• Clear resistance group: Group 5 identification helps growers distinguish same-active substitutes from genuine different-mode rotation options.
• Defined harvest intervals: the official table publishes PHIs from 30 to 120 days depending on crop.

Brand

Barrier by Dhanuka

Active ingredient

Metribuzin 70%

Formulation

WP (Wettable Powder)

Chemical family

Triazinone

HRAC group

Group 5, formerly C1/C2

Mode of action

Inhibition of photosynthesis at PSII — D1 Serine-264 binding

Registered crops in this guide

Soybean, wheat, sugarcane, potato and tomato

1. Uptake: susceptible weeds absorb Metribuzin predominantly through roots and also through foliage.
2. Movement: the active ingredient moves upward through the xylem toward leaves and growing tissue.
3. Photosynthesis inhibition: Group 5 action blocks electron transport at photosystem II, stopping energy production in susceptible weeds.

Repeated Group 5 use can select resistant weed populations. Another Metribuzin 70% WP brand is a same-mode substitute, not a resistance-management rotation.

Use the official hectare recommendation. A grams-per-litre value is deliberately omitted because water volume varies by crop and use.

PHI means pre-harvest interval. DAP means days after planting and DAT means days after transplanting. Do not shorten the crop-specific PHI.

• Prepare a slurry: mix the measured wettable powder with a small amount of clean water to form a smooth thin paste, then add it slowly to the required water while stirring.
• Use suitable equipment: apply evenly with a knapsack or foot-operated sprayer fitted with a flat-fan or flood-jet nozzle.
• Avoid overlap and drift: overlapping swaths can overdose the crop; keep spray away from neighbouring fields and water bodies.
• Protect the treated layer: for pre-emergence use, prepare a clod-free field and do not disturb the soil after application.
• No inferred mixtures: this page does not recommend combining Barrier with another herbicide, pesticide, fertiliser or adjuvant. Related and rotation products are separate alternatives.

Wear full protective clothing, chemical-resistant gloves, eye protection and a suitable mask while measuring, mixing and spraying. Avoid skin and eye contact and inhalation of powder or spray mist. Do not eat, drink, smoke or chew during application. Wash exposed skin and contaminated clothing after work. Keep the original sealed pack under lock and key, away from children, food, animal feed and water. Prevent drift, runoff, surplus spray and equipment washings from reaching ponds, canals or drains. Do not reuse the empty container. After suspected exposure, move away from the source, follow the pack first-aid directions and obtain medical attention with the label. No specific antidote is listed for Metribuzin 70% WP; treatment is symptomatic and supportive under medical supervision.

Always read and follow the current official Barrier label and local regulatory instructions. The pack label overrides this page. Use only on the labelled crop, weeds, rate, water volume, timing and safety conditions. Mana Agri Mart does not recommend off-label use or an unverified tank mixture.