Grazon Extra

Manufacturer
CORTEVA
Category
Herbicides
Registered until
2024-06-29
Registration number
60830
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GENERAL INSTRUCTIONS

MINIMUM RECROPPING PERIODS

Aminopyralid and picloram remain active in the soil for extended periods depending on the rate of application, soil type (clay content), rainfall, temperature, humidity, soil moisture and soil organic matter. The following tables show plant-back periods to particular crops following application of Grazon Extra in different areas/situations of Australia.

Table A: Northern New South Wales & Queensland

Plant-back periods for rotational crops following application of Grazon Extra for rates up to 600 mL/ha on black cracking clay soils. These plant-back periods are based on a normal rainfall pattern. During drought conditions (or when the rainfall is less than 100 mm for a period of 4 months or greater) the plant-back period may be significantly longer.

Grazon Extra label 22nd July 2021

Thorough coverage of foliage to the point of run-off is essential; however, avoid excess spraying which is wasteful of chemical.

Hand Gun

  • Apply the recommended mix to give full coverage of leaves and stems through a No. 6 to 8 tip at 700 to 1500 kPa (400 to 500 kPa for St John's wort).

  • A spray volume of 3000 to 4000 L per infested hectare of 1 to 2 metre high blackberry (30 to 40 L/100 m²) should be used.

  • Use 2000 L of spray mixture/ha of galenia infestation (i.e. 20 L/100 m² infested area).

Knapsack & 12 volt Sprayer Packs

  • Apply the recommended spray mix to give full coverage of leaves and stems.

  • Only recommended for the control of herbaceous weeds, such as capeweed, fireweed and spear thistle, and woody weeds that are not regrowth less than 60 cm high or 60 cm diameter.

B. Aerial Application

  • Apply in 200 L of water/ha using an aircraft to apply 100 L per pass on a double overlap pattern using nozzle configurations to produce coarse to very coarse droplets as defined by ASAE S572.

C. Controlled Droplet Application (C.D.A.)

  • Results similar to high volume spraying can be obtained using Micron Herbi or similar equipment. Select a nozzle to give a flow rate of 2 mL/sec and sweeping action of approximately 1 m/sec to ensure a droplet density of 20/cm². Use a marking agent, as recommended by the equipment manufacturers, to check spray coverage. Also, consult directions provided with C.D.A. unit.

D. Low Volume High Concentrate Application Techniques

  • Good control will be achieved, similar to high volume application, where bush size enables good coverage of entire bush. Use a marking agent, as recommended by the equipment manufacturers, to check spray coverage.

  • Gas powered gun: Apply 50 mL shots to obtain uniform coverage of 4 to 5 m² of surface area of bush. This relates to 20 droplets/cm² of leaf surface.

  • Sprinkler sprayer: This technique involves using a micro sprinkler that is connected to a hollow fibre glass rod attached to a pneumatic knapsack sprayer. Use at low pressures (50 to 200 kPa) and apply with a slow sweeping action over the top of the plants ensuring even coverage on the leaves.

E./F Boom Application

  • Application in a minimum spray volume of 200 L/ha for galenia and St. John’s wort and 600 L of water/ha for sickle pod. Use nozzle configurations to produce course spray droplets as defined by ASAE S572 definition for standard nozzles. Boom height must be set to ensure double overlap of nozzle patterns.

2. FALLOW SITUATIONS

A. Boom Application

  • Application of Grazon Extra in a minimum spray volume of 70 L/ha is recommended using nozzle configurations to produce course spray droplets as defined by ASAE S572 definition for standard nozzles. Boom height must be set to ensure double overlap of nozzle patterns.

Grazon Extra label 22nd July 2021

B. Blanket Wiper Application

  • Blanket needs to be made from durable and wettable material with a rigid backing.

  • Blanket should be rigidly mounted behind motorised vehicle (e.g. tractor, 4-wheel drive vehicle) and set low but never touching the ground. The chemical solution should be fed to the blanket at a flow rate sufficient to keep the blanket wet but not dripping. In thick patches the blanket may require more frequent solution recharge (rewetting).

  • Ideally, a scraper bar should be mounted in front of the blanket in order to scrape or damage the bark (but not sever the stems) prior to the blanket wiping the stems. This scraper may be mounted at the front of the vehicle.

  • Two passes (in opposite direction) with the blanket increases the contact with the plant. Ground speeds of 10–15 kph are ideal for blanket wiping application.

COMPATIBILITY

  • Follow any regional restrictions, and all directions and restrictions on the labels of any chemical mixed with Grazon Extra (e.g. 2,4,-D amine).

  • Grazon Extra is compatible with the following herbicides: Glyphosate 450, metsulfuron-methyl, Roundup CT, Starane Advanced, Statesman 720, Stinger.

  • Grazon Extra is compatible with the following adjuvants, as per Directions for Use on this label; Uptake Spraying Oil, BS1000 Biodegradable Surfactant, (alternatives are Chemwet 1000, and Spreadwet 1000 Wetting Agent), or Pulse Penetrant

  • Not all surfactants or crop oils are of equal quality, Corteva Agriscience does not support the use of alternative products other than those listed in the COMPATIBILITY section.

CLEANING SPRAY EQUIPMENT

Rinsing

  • After using Grazon Extra, empty the spray unit completely and drain the whole system. Thoroughly wash inside the unit using a pressure hose. Drain the spray unit, and clean any filters in the tank, pump, lines, hoses and nozzles.

  • After cleaning the spray unit as above, quarter fill with clean water and circulate through the pump, lines, hoses and nozzles. Drain and repeat the rinsing procedure twice.

Decontamination

Before spraying cotton and other sensitive crops with equipment that has been used to apply Grazon Extra (see PROTECTION OF CROPS, NATIVE AND OTHER NON-TARGET PLANTS section). Wash the tank and rinse the system as above. Then quarter fill the tank and add a standard alkali based laundry detergent at 500 g (or mL)/100 L water and circulate throughout the system for at least 15 minutes. If using a concentrated laundry detergent, use 250 g (or mL)/100 L water. Do not use chlorine based cleaners. Drain the whole system. Remove filters and nozzles and clean them separately. Finally flush the system with clean water and allow to drain. Rinse water should be discharged onto a designated disposal area or, if this is unavailable, onto unused land away from desirable plants and watercourses.

Registered for cultures
Pasture