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Introduction

Barrier Herbicide (Metribuzin 70% WP) is a selective, pre-emergence and early post-emergence herbicide formulated as a wettable powder (WP) containing 70% metribuzin, a triazinone herbicide that acts as an inhibitor of photosynthesis in plants. By disrupting photosynthesis, metribuzin prevents the production of essential carbohydrates and energy, leading to stunted growth and plant death.

Active Ingredient and Mode of Action

The active ingredient in Barrier Herbicide, metribuzin, is a synthetic triazinone herbicide that mimics the natural plant growth regulator plastoquinone. When absorbed by susceptible weeds, metribuzin binds to the plastoquinone binding protein (QBB), a protein complex essential for the transfer of electrons in the photosynthetic electron transport chain. By disrupting electron transport, metribuzin prevents the conversion of light energy into chemical energy, halting photosynthesis and depriving the plant of its primary energy source.

This disruption in photosynthesis manifests as chlorosis (yellowing) and necrosis (tissue death) of plant tissues, eventually leading to plant death.

Application Methods

Barrier Herbicide can be applied as a pre-emergence or early post-emergence herbicide, either as a foliar spray or a soil drench.

• Pre-emergence application: Apply the herbicide before the emergence of weeds, typically within 2-3 days after planting or transplanting.

• Early post-emergence application: Apply the herbicide when weeds are small and actively growing, typically within 7-10 days after emergence.

• Foliar spray: Mix the recommended dosage of Barrier Herbicide with water and apply it to the leaves of weeds until they are thoroughly wet.

• Soil drench: Mix the recommended dosage of Barrier Herbicide with water and apply it to the soil around the base of crop plants or non-crop areas.

Dosage Rates

The recommended dosage rate of Barrier Herbicide varies depending on the target weed, crop, soil type, and application method. Consult the product label for specific dosage instructions.

Precautions

When handling and applying Barrier Herbicide, follow these precautionary measures to ensure safety:

• Wear protective clothing, including gloves, goggles, and a respirator.

• Avoid contact with skin and eyes.

• Do not apply the herbicide in windy conditions.

• Wash hands thoroughly after handling the product.

• Dispose of empty containers responsibly.

• Avoid using near water sources or aquatic habitats.

• Do not use on bees or other beneficial insects.

Storage and Shelf Life

Store Barrier Herbicide in a cool, dry place, away from direct sunlight and heat. When stored properly, the product has a shelf life of two years.

Conclusion

Barrier Herbicide (Metribuzin 70% WP) is a versatile and effective herbicide that provides pre-emergence and early post-emergence control of a wide range of annual broadleaf weeds in various crops and non-crop applications. Its selective action, long-lasting residual activity, and favorable environmental profile make it a valuable tool for integrated pest management (IPM) programs. However, it is important to use Barrier Herbicide responsibly and in accordance with label instructions to minimize potential risks to human health and the environment.