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Atrazine 900 WG


Product:

APVMA Code :58450

Active Constituent(s): 900g/kg atrazine
Registered For:

 

 

 Commercial use

 Domestic use

Overview: Cheminova Atrazine 900 WG is for the control of selective annual grasses and broadleaf weed control.
Chemical Group triazine
Documents:

 MSDS (296.2 KB)

 Label (230.2 KB)


General Instructions

 

Atrazine 900 WG is a pre and post emergent herbicide that controls weeds from seed and weed seedlings. However, established perennial species, large annuals, and large broadleaf weeds are not satisfactorily controlled at the rates recommended. It acts mainly through root absorption; its effectiveness depends on the occurrence of control rainfall or irrigation to move it down into the weed zone. Duration and effectiveness of control depends on the amount of chemical applied, soil type, rainfall and particular weed species.

 

The maximum rate of atrazine application in all crops except plantation forestry is limited to an amount of product equivalent to 3 kg a.i. atrazine/ha per year. DO NOT exceed this limit, especially when applying an atrazine herbicide postemergence, where an atrazine herbicide has been applied preemergence.

 

The maximum rate of application in plantation forestry is an amount of product equivalent to 4.5 kg a.i. atrazine per year in sandy soils and those defined as highly erodible, and product equivalent to 8 kg a.i. atrazine/ha per year in clay loam and heavier textured soils.

 

INTEGRATED WEED MANAGEMENT STRATEGY FOR TT CANOLA

 

The use of this product in TT canola is subject to an Integrated Weed Management Strategy for the use of triazine herbicides in TT canola. The Strategy encompasses:

  • Integrated Weed Management;
  • The specific management of crop plant volunteers and outcrossing to other plants; and
  • Triazine herbicide residue management (agronomic and environment).

Compliance with registered label directions and adoption of the principles outlined in the Strategy will assist with implementation of crop management practices that minimise the development of herbicide resistance in treated weeds; reduce the levels of triazine residues in the environment; and manage volunteer plants and outcrossing.

 

Copies of the Strategy are available from a Ospray Pty Ltd representative or from the Avcare website (www.avcare.org.au).

 

It is advised that consultation be undertaken with an appropriate agronomist, consultant or Department adviser prior to the use of Atrazine Herbicide on TT canola.

 

To minimise herbicide resistance:

Avoid dry sowing in heavily weed infested paddocks. Wait for a weed germination after the opening rains in weedy paddocks. Use a preplant knockdown or cultivation. No weeds should be allowed to survive at this stage.

 

Adapt the weed control program to the anticipated weed spectrum and pressure:

Broadleaf Weeds and Ryegrass: Use (simazine 900g/Kg) or (atrazine 900g/Kg) plus trifluralin pre-emergence. A followup with a Group A herbicide (if ryegrass is susceptible) or atrazine 900g/Kg may benecessary.

 

Broadleaf Weeds only:

Use atrazine 900g/Kg post emergence.

DO NOT use atrazine 900g/Kg or simazine 900g/Kg if the area to be treated had a triazine herbicide applied to it last season.
Watch for escapes, especially in paddocks with a long history of Group C herbicide use.

 

DO NOT use Group C herbicides in consecutive years.

 

Resistant Weeds Reporting

 

Growers should collect plant or seed samples where weeds that are normally susceptible to tatrazine and simazine may be resistant, get them tested and seek professional advice.

 

To avoid Triazine carryover:

On acid soils (pH less than 6.5) The maximum rate of atrazine 900g/Kg or simazine 900g/Kg or a combination of the two products to be applied to the crop during the growing season is 2.2 Kg/ha. On alkaline soils (pH greater than 6.5) The maximum rate of atrazine 900g/Kg or simazine 900g/Kg or a combination of the two products to be applied to the crop during the growing season is 1.1 Kg/ha. Postemergence use: It is recommended that atrazine 900g/Kg only be used, and at rates of 1.1 Kg/ha or less, on both acid and alkaline soils.

 

Mixing

 

DO NOT mix, load or apply within 20m of any well, sink hole or intermittent or perennial stream or river. This product readily mixes with water. Add required quantity to the spray vat with the tank filter mesh removed and the vat 50 to 75% full with water. The agitation system should be running during addition of the product and during the spraying operation. If left to settle, stir and resuspend any settled material before starting pump and spraying product. Avoid drawing accumulated particles into outlet pipe. DO NOT premix in a bucket as a paste.

 

Wetting Agent: Add 600g/L non-ionic surfactant at 125 mL/100L or 1000g/L non-ionic surfactant at 75 mL/100L of spray mixture when applying to emerged weeds as a foliar spray.

 

Incorporation

 

Preplant and at sowing application

This product acts mainly by root absorption. Its effectiveness depends on the occurrence of rainfall or irrigation to move it down into the weed root zone. Sufficient rain or irrigation to thoroughly wet the soil through the weed root zone should occur or be made immediately after application to provide appropriate weed control. Delay in activation of the product may result in some weed growth.

 

In flood or furrow irrigation situations complete and continued activation of the product may not occur due to a thin band of dry soil on the surface during or after irrigation. Mechanical incorporation after application, using light harrows to incorporate the product into the soil not more than 4cm deep is required to ensure the irrigation water activates the product. Always apply the product to an even unridged seedbed.

 

Application

 

Minimum volumes of spray mixture per hectare:

By aircraft: Preplant/preemergence application - 15L. Postemergence application - 22L.

With aircraft application the need for good soil moisture at the time of application and follow up rain or irrigation within 10 days is most critical.

 

DO NOT use human flaggers in aerial spraying, unless protected by engineering controls such as enclosed cabs.

 

By low volume boom: Preplant/preemergence application - 55L. Postemergence application 110L.

Application can be made as an overall or band treatment. Minimum band width should be 30 cm.

 

TT Canola:

DO NOT apply to TTcanola by aircraft. Apply only with a low boom sprayer with a 60m buffer zone downwind of treated fields to natural or impounded lakes or dams, and a 20m buffer zone for any well, sink hole, intermittent or perennial stream. Apply only to areas where runoff is unlikely to occur or where runoff may be captured by farm earthworks.

 

Summer Crops

Heavy rains immediately following an application tend to result in excessive concentrations of herbicide in the seed furrow, thus encouraging possible crop injury. This is most likely to occur when a preplant or pre-emergent application is made using rates in excess of 2 kg per hectare. To avoid the likelihood of herbicide injury follow time of application (a), (b) or (d) listed below.

 

Time of application

(SORGHUM, MAIZE, BROOM MILLET, SACCALINE, SWEET CORN)

 

(a) PREPLANT APPLICATION FOLLOWED BY A POSTEMERGENCE APPLICATION

Apply after establishment of the seed bed and up to two weeks prior to sowing. If using this technique on irrigated crops, application should preferably be made to moist soil. If applied to dry soil, lightly harrow to incorporate Atrazine 900 WG into the soil not more than 4 em deep. A postemergence spray must be applied as soon as possible after the crop has emerged and developed 2 to 3 leaves.

 

(b) PREEMERGENCE APPLICATION FOLLOWED BY A POSTEMERGENCE APPLICATION.

Apply at or immediately after planting and before crop and weeds emerge. Application should preferably be made to moist soil. If applied to dry soil, lightly harrow to incorporate Atrazine 900 WG into the soil not more than 4 cm deep. If using this technique on irrigated crops, then a postemergence spray must be applied as soon as possible after the crop has emerged and developed 2 to 3 leaves.

 

(c) PREEMERGENCE APPLICATION

Apply at or immediately after planting and before crop and weeds emerge. Application should preferably be made to moist soil. NOTE: Applying the total amount of this product as a preemergence application increases the risk outlined in Crop Safety Summer Crops, below.

 

(d) POSTEMERGENCE APPLICATION

Application must be made to seedling broadleaf weeds and grasses when they are not more than 1 cm high. Normally the crop is then at the 2 to 3 leaf stage. For best results the soil should be moist and rain or irrigation should follow the application. If applied to dry soil, lightly harrow to incorporate Atrazine 900 WG into the soil not more than 4 cm deep. Add 600g/L non-ionic surfactant at the rate of 125 mL/100L or 1000g/L non-ionic surfactant at the rate 75 ml/100L of spray, for all postemergence applications, or in sweetcorn/maize 5.5L crop oil/ha. NOTE: Should weeds develop after preplant or preemergence application, a shallow cultivation may assist the control. Avoid deep cultivation which may throw untreated soil over the sprayed areas as this may seriously reduce weed control.

 

Crop Safety

 

Summer crops

 

Sorghum, Broom millet, Saccaline:

Heavy rains immediately following an application tend to result in excessive concentrations of herbicide in the seed furrow, thus encouraging possible crop injury. This is most likely to occur when a preplant or pre-emergence application is made using rates in excess of 2 kg/ha. To avoid the likelihood of herbicide injury use technique (a), (b) or (d) (See Time of application). In the northern irrigation areas of Western Australia, do not use as a preemergence application during wet season.

 

Maize, Sweetcorn, Sorghum, Broom millet, Saccaline:

When sowing is made on the 'flat', avoid application to ridged soil. NOTE: Preplant or preemergence applications are preferred where grasses are the major problem.

 

Restraints

 

Do NOT use as a pre-emergent spray on light sandy soils.

 

Do NOT use on weeds over 4 cm tall.

 

Do NOT apply to waterlogged soil.

 

Do NOT apply if heavy rains or storms that are likely to cause run off are forecast within two days of application.

 

Do NOT irrigate to the point of run off for at least two days after application.

 

Do NOT use a preemergence application in Sorghum, Broom Millet or Saccaline during the wet season in the northern irrigation areas of Western Australia.

 

SOIL MOISTURE The product requires rainfall or irrigation to move it down through the soil into the weed root zone to make it effective. Sufficient rain or irrigation to thoroughly wet the soil through the weed zone should occur or be made within 10 days after spraying.

 

Resistance Warning

 

Atrazine 900 WG Herbicide is a member of the triazines group of herbicides. Atrazine 900 WG has the inhibitor of photosynthesis at photosystem II mode of action. For weed resistance management Atrazine 900 WG is a Group C herbicide. Some naturally occurring weed biotypes resistant to Atrazine 900 WG and other inhibitors of photosynthesis at photosystem II herbicides may exist through normal genetic variability in any weed population. The resistant individuals can eventually dominate the weed population if these herbicides are used repeatedly. These resistant weeds will not be controlled by Atrazine 900 WG or other inhibitors of photosynthesis at photosystem II herbicides.

 

Since the occurrence of resistant weeds is difficult to detect prior to use, Cheminova accepts no liability for any losses that may result from the failure of Atrazine 900 WG to control resistant weeds.

 

Protection of wildlife, fish, crustaceans and environment

DO NOT contaminate streams, rivers or waterways with the chemical or used containers. This product is very highly toxic to algae and aquatic macrophytes.

 

DO NOT apply this product within 60 m of natural or impounded lakes or dams.

 

DO NOT use in channels or drains.

 

DO NOT apply under meteorological conditions or from spraying equipment which could be expected to cause drift of this product or spray mix into adjacent areas, particularly wetlands, waterbodies or watercourses.

 

Protection of crop, native and other non-target plants

DO NOT apply under weather conditions or from spraying equipment which may cause spray to drift onto nearby susceptible plants/crops, cropping lands or pastures, particularly wetlands, waterbodies or watercourses.

 

DO NOT plant crops other than those recommended on this label for at least 6 months following treatments of this product at rates up to 1.4 kg/ha and for 18 months following treatments of 1.4 to 3.3 kg/ha. When rates exceed 3.3 kg per hectare plantings may not be possible for very long periods afterwards.

 

Safety Directions

 

Avoid contact with eyes and skin. Do not inhale dust or spray mist. When preparing the spray and using the prepared spray wear elbow length PVC gloves. After use and before eating, drinking or smoking, wash hands, arms and face thoroughly with soap and water. After each day's use wash gloves.

 

Storage

Store in the closed, original container in a dry, wellventilated locked area, as cool as possible out of direct sunlight and away from children, animals, food, feedstuffs, seed and fertilisers.

 

Disposal

Shake empty into spray tank. DO NOT dispose of undiluted chemicals onsite. Puncture or shred and bury empty containers in a local authority landfill. If no landfill is available, bury the containers below 500 mm in a disposal pit specifically marked and set up for this purpose clear of waterways, desirable vegetation and tree roots. Empty containers and product should not be burnt.

 

Precautions Warning

 

When used in Signal grass and Panicum maximum, application of this product may cause damage and the user accepts all responsibility should any damage occur to the crop.

 

Precaution

DO NOT dispense atrazine via dust prone methods e.g. hand operated cranking handles. Only use with applicators specifically designed to dispense granular products with minimum dust e.g. WeedAMetre granular dispenser, the Swissmex manual applicator, the Forest Mac applicator.

 

Re-entry Period

DO NOT enter treated areas without protective clothing until spray has dried.

 

Product details last updated on 02 Jul 2010

 

DISCLAIMER: This is not the ATRAZINE 900WG HERBICIDE label. To view or print the label for this product, click the "MSDS/Label" tab at the top of this page. Always follow label instructions.

 

For specialist advice in an EMERGENCY only phone 1800 033 111, TOLL-FREE, ALL-HOURS, NATIONWIDE


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