Shivalik Nyra Pyroxasulfone 85% WG Selective Herbicide

Shivalik Nyra Pyroxasulfone 85% WG Selective Herbicide

Shivalik Nyra is a selective, primarily pre-emergence herbicide containing Pyroxasulfone 85% WG. It is designed to control susceptible grass weeds and selected broadleaf weeds in approved crops such as wheat, maize and soybean. Nyra is particularly relevant for managing Phalaris minor, commonly known as canary grass or Gulli Danda, which competes with wheat for nutrients, water and sunlight.

Pyroxasulfone works by inhibiting the synthesis of very-long-chain fatty acids required for the growth of germinating weed seedlings. Its soil activity helps prevent susceptible weeds from establishing when applied at the correct stage. Timely application, adequate soil moisture and uniform spray coverage are important for effective weed management.

Product Details

Key Features and Benefits

• Pre-Emergence Weed Control: Helps stop susceptible weeds during germination and early establishment.
• Effective Against Phalaris Minor: Useful for managing Gulli Danda in wheat.
• Group 15 Mode of Action: Provides a different herbicide mode of action for resistance-management programmes.
• Residual Soil Activity: Helps suppress susceptible weed emergence for a period after treatment, depending on soil and environmental conditions.
• Reduces Early Weed Competition: Helps crops establish with less competition for nutrients, water and sunlight.
• Multiple Crop Applications: Pyroxasulfone 85% WG has published recommendations for wheat, maize and soybean.

Recommended Crops and Target Weeds

These crop and weed recommendations are based on published information for Pyroxasulfone 85% WG. Confirm that the specific crop and target weed are approved on the Shivalik Nyra label before use.

Dosage and Application Method

Application Timing: Generally apply to moist soil after sowing and before weed emergence, following the approved crop-specific label. For wheat, the Indian Institute of Wheat and Barley Research has also described a specific application window around 20 days after sowing, before the first irrigation, when the initial application was missed. This alternative timing should be used only when permitted by the product label and local crop advisory.

Important: These are reference values for Pyroxasulfone 85% WG formulations, not independently verified Shivalik Nyra label directions. Follow the original product leaflet for the exact dosage, timing and water volume.

How Does Shivalik Nyra Work?

Nyra contains Pyroxasulfone, an herbicide belonging to HRAC Group 15. It inhibits very-long-chain fatty acid synthesis, which is necessary for cell membrane development and the normal growth of germinating weed seedlings.

When applied to soil at the recommended stage, it affects susceptible weeds during germination and early shoot development. This prevents or reduces their establishment and helps minimise competition with the main crop.

Nyra is not intended to replace an approved post-emergence herbicide for large, established weeds.

How to Apply Shivalik Nyra

1. Confirm the crop and weed are included in the registered product label.
2. Prepare a suitable seedbed with adequate soil moisture.
3. Measure the recommended quantity according to the label.
4. Mix the water-dispersible granules with a small quantity of water to form a uniform suspension.
5. Add the mixture to a partially filled spray tank and maintain agitation.
6. Complete the dilution with the recommended water volume.
7. Apply uniformly to the soil using a calibrated sprayer and suitable flat-fan nozzle.
8. Avoid disturbing the treated soil surface after application.

Important Precautions

• Use only on crops and weeds approved on the registered label.
• Do not exceed the recommended dose.
• Avoid spraying immediately before heavy rainfall or flooding.
• Ensure adequate soil moisture for effective pre-emergence activity.
• Be cautious on light or sandy soils, where excessive herbicide exposure can increase crop injury risk.
• Wear protective gloves, eye protection, suitable respiratory protection and full-sleeved clothing.
• Prevent spray drift onto neighbouring crops and sensitive plants.
• Rotate herbicide modes of action to help manage weed resistance.
• Check compatibility and label approval before tank mixing.
• Keep away from children, livestock, food and drinking water.

Frequently Asked Questions

1. What is Shivalik Nyra used for?

It is a selective herbicide for controlling susceptible weeds during germination, particularly Phalaris minor in wheat.

2. What is the technical composition of Nyra?

Nyra contains Pyroxasulfone 85% WG.

3. Can Nyra control Gulli Danda in wheat?

Yes. Pyroxasulfone 85% WG is recommended for managing Phalaris minor in wheat, including certain herbicide-resistant populations.

4. What is the recommended dose?

The published reference recommendation is approximately 60 g per acre. Confirm the exact amount on the Shivalik Nyra label.

5. Is Nyra a pre-emergence herbicide?

Yes. It acts primarily on germinating weed seedlings through residual activity in treated soil.

6. Can Nyra be used in maize and soybean?

Pyroxasulfone 85% WG has published uses in both crops. Check the specific Nyra label before application.

7. Does Nyra control already-grown weeds?

It is not intended for controlling large established weeds. Its primary activity is against susceptible weeds during germination and early establishment.

8. Which herbicide group does Nyra belong to?

Pyroxasulfone belongs to HRAC Group 15, the very-long-chain fatty acid synthesis inhibitors.

Disclaimer: This description is for general product information. Crop recommendations and reference dosage are based on published Pyroxasulfone 85% WG guidance. The complete registered label for Shivalik Nyra has not been independently verified. Always follow the original product label, approved crops, application timing, dosage, waiting period and safety instructions.