Terbuthylazine

1 Trade nameManufacturerForm
Farmalinx Sputnik HerbicideFARMALINX PTY LTDWATER DISPERSIBLE GRANULE
NUFARM TERBAZINE 875WG HERBICIDENUFARM AUSTRALIA LIMITEDWATER DISPERSIBLE GRANULE
TERBYNE 750 WG HERBICIDESIPCAM PACIFIC AUSTRALIA PTY LTDWATER DISPERSIBLE GRANULE
TERBYNE XTREME 875 WG HERBICIDESIPCAM PACIFIC AUSTRALIA PTY LTDWATER DISPERSIBLE GRANULE
TYLLANEX 800 WG HERBICIDEADAMA AUSTRALIA PTY LIMITEDWATER DISPERSIBLE GRANULE

2 PRICE:

$28.6/kg

3 ACTIVE INGREDIENTS: Terbuthylazine 750 g/kg (or800g/kg)

4 CHEMICAL GROUP: C

5 RELATED HERBICIDES:

Ametryn 500Ametryn 500g/L
Atrazine 500 FlowableAtrazine 500-600g/L
Atrazine 900 GranulesAtrazine 900g/kg
Atrazine plus SimazineAtrazine 250g/L + simazine 250g/L
BasagranBentazone 480g/L
BetanalPhenmedipham 157g/L
Bromacil 800Bromacil 800g/kg
Bromoxynil 200Bromoxynil 200g/L
ChloridazonChloridazon 650g/kg
Cyanazine 900Cyanazine 900g/kg
DiuronDiuron 500g/L
DiuronDiuron 900g/kg
Forest MixAtrazine 620g/kg + hexazinone 210 g/kg
Forest Mix GranulesAtrazine 150g/kg + hexazinone 50 g/kg
Gesagard 500 SCPrometryn 500g/L
GraslanTebuthiuron 200g/kg (or400g/kg)
IoxynilIoxynil 250g/L
Linuron 500Linuron 500g/L or 500g/kg (or800g/kg)
Metribuzin 750Metribuzin 750g/kg
Metribuzin plus SimazineMetribuzin + simazine
Metribuzin plus TribunilMetribuzin 140g/kg + Methabenzthiazuron 560g/kg
Prometryn 900Prometryn 900g/kg
PropanilPropanil 360 g/L (600g/L)
Sencor 480Metribuzin 480g/L
Simazine Flowable 500Simazine 500g/L
Simazine Granules 900Simazine 900g/kg
Terbacil 800Terbacil 800g/kg
TerbuthylazineTerbuthylazine 750 g/kg (or800g/kg)
Terbutryn 500Terbutryn 500g/L
ToughPyridate 450g/L
TribunilMethabenzthiazuron 700g/kg
VelparHexazinone 750g/kg

6 GENERAL DESCRIPTION:

An agricultural herbicide for the control of broad-leaved weeds in leguminous and triazine tolerant crops.

7 APPLICATION METHODS AND TIPS:

Best results when applied in fine weather, before weeds emerge or when they are very young and actively growing and rain follows a few days later.

High rates on very alkaline soils (pH>8) may cause crop damage.

Consider residual herbicide from previous triazine applications as this may be additive and damage crop.

Use lower rates on sandy soils and higher rates on heavy soils.

Some crop yellowing may occur after application.

Do not apply to waterlogged soil or if heavy rain expected within 2 days.

Avoid using in cloddy or high trash areas or where deep furrows are left by planting equipment.

Add 1% spray oil for control of weeds that have emerged.

Sow grain legumes 3-5 cm deep.

Don't use within 60 m of water bodies.

8 WEATHER:

Rainfast in probably 4 hours for post em applications. Rain improves pre em applications.

Frost effects: No effect on pre em applications. Reduced efficacy for post em applications.

Wind:

Inversions: Avoid application during low level inversions as excessive drift may occur.

Temperature:

Delta T and relative humidity: Avoid post em applications when Delta T is greater than

9 ADJUVANTS:

Wetting agents:

Spray oils: Use for post emergent applications

10 WATER QUALITY:

Hard water: Little effect.

Salty water: Little effect.

Colloids: Little effect.

pH:

Tank life: Long. Probably weeks.

11 COMPATIBILITY:

Trace elements.

See HerbiGuide Compatibilities button.

12 EQUIPMENT:

Boom sprays:

Carrier volume: 30-200 L/ha.

Nozzles: Flat fan.

Pressure: 150-400 kPa.

Droplet size: Coarse droplets recommended on the label. Use finer droplets for post em sprays.

Aerial application:

Carrier volume: 30 L/ha.

13 SPRAYER DECONTAMINATION:

Clean Up:

Clean soon after spraying to reduce the risk of forming dried deposits that may be difficult to remove. Mechanically removed any caked deposits.

Remove filters and clean separately. Rinse with soapy water (eg 500 mL or g of Drive, Dynamo, Omo or Surf per 100 L water) or water plus 0.25% wetting agent and run through boom. Rinse with water.

Decontamination:

Remove filters and clean then soak in 500 mL household ammonia in 10 L water for 30 minutes.

Rinse sprayer with soapy water (eg 500 mL or g of Drive, Dynamo, Omo or Surf per 100 L water) or water plus 0.25% wetting agent and run through boom. Add 1 L of household ammonia (3% active ingredient) per 100 L water while filling the tank. Circulate through the system and spray a small quantity through the boom then allow to stand for several hours. Rinse with soapy water or water plus 0.25% wetting agent. Rinse with water. Or use a commercial spray tank and equipment cleaner.

Rinse nozzles and filters in water and replace then rinse the whole system with water again.

14 HERBICIDE RESISTANCE:

Tolerant plants are expected to occur and may dominate the weed population after repeated applications.

15 REPLANTING INTERVALS:

CropTime
All that are not on label>6 months

16 WITHHOLDING PERIODS:

CropTypeTime
AllGrazing6 weeks
AllHarvestNot required

17 RE-ENTRY PERIOD:

8 days.

Wear protective clothing if in contact with the crop before the spray has dried.

18 PROTECTIVE CLOTHING:

Overalls, boots and washable hat. Use gloves and face shield when handling the concentrate.

19 SOIL:

Soil texture: Use lower rates in light soils and higher rates in heavy soils.

Soil pH: More active in very alkaline soils with pH>8 and crop damage may occur.

Soil organic matter: High levels may absorb herbicide and increase breakdown and thus reduce the level of weed control.

Soil moisture at application: Moist soil is require for the good results.

20 MODE OF ACTION:

Inhibitor of photosynthesis at photosystem II

Uptake and translocation:

Absorbed mainly through the roots, with some leaf uptake. Translocated within the plant.

Physiological effects:

Yellowing.

Residual Life and Breakdown:

Microbial breakdown and hydrolysis.

21 SELECTIVITY:

Crop tolerance:

Varietal sensitivities:

Effect on Clover Species:

Damages clover.

Effect on Medic Species:

Damages medics.

Effect on Lucerne:

Damages young lucerne

Effect on Native Plants:

Probably reasonably tolerant.

22 DISEASE AND INSECT EFFECTS:

23 PLANT SYMPTOMS:

Yellowing followed by death.

SECONDARY EFFECTS:

24 TOXICITY:

Summary:

Harmful if swallowed.

Details:

Poison schedule: S6

Mammalian toxicity:

Acute oral LD50: 1590-2000 mg/kg (rat), [For comparison table salt is 3000 mg/kg]

Acute dermal LD50: >2000 mg/kg (rabbit).

Skin: May be irritating. Not sensitizing.

Eye: Mildly irritating.

Vapour inhalation: LC50 > mg/L air (rat). Long term inhalation of high amounts of dust may overload lung clearance mechanism. Available data indicates that this product is not harmful. Product is unlikely to cause any discomfort or irritation.

Studies showed some increase in tumours in animals exposed to terbuthylazine at high dose levels but overall it is unlikely to be carcinogenic to humans. It can cause developmental or reproductive effects however these are generally at lower doses than maternal toxic effects and it is not genotoxic or teratogenic.

Chronic oral toxicity: for two years.

Acceptable Daily Intake (ADI): 0.003 mg/kg/day.

NOEL: 0.35 mg/kg/day

In mammals: following oral administration, 722-84% is eliminated in the urine and faeces within 24 hours, and almost all within 48 hours. A de-ethyl metabolite forms rapidly, followed by conjugates of products formed by oxidation of one methyl group of the tert-butyl type. All are rapidly excreted.

Other Species:

Birds: Low toxicity. LD50 >1000 mg/kg Ducks and quail.

Eight day dietary LD50 for ducks and quail >5620ppm

Fish: toxicity: LC50 (96hr) for rainbow trout 3.8-4.6, Bluegill sunfish 7.5, carp and catfish 7.0 mg/L.

Invertebrates: toxicity. Daphnia LC50 (48hr) 21-50.9 mg/L

Bees: Low toxicity. LD50 (oral and contact) >100µg/bee

Arthropods: toxicity.

Earthworms: LC50 (7 day) >200 mg/kg soil

Algae: LC50 (72hr) 0.016-0.024 mg/L

Accumulation:

25 TOXICITY SYMPTOMS:

26 FIRST AID:

Not normally required.

If SWALLOWED: Wash out mouth with water. Do NOT induce vomiting. Do NOT give anything by mouth to a semiconscious or unconscious patient.

If in EYES: Hold eyelids open and wash eyes with plenty of water.

If on SKIN: Remove contaminated clothing. Wash with soap and water.

If INHALED: Remove patient to fresh air. See a doctor if symptoms persist.

Advice to doctor: Treat symptomatically.

Contact the Poisons Information Centre on 131126.

27 ENVIRONMENTAL FATE:

Half life in soil: 30-60 days.

Half life in water: days at pH5 and 35 C.

It has an EPA classification for soil mobility that ranges from

It has a leaching index of . (for comparison, trifluralin is 0-1 and chlorsulfuron is 25-30).

Ground water contamination: Possible.

Accumulation in milk and tissues: Not expected.

pH stability:

Photolysis rate:

Hydrolysis half life:

Biodegradation rate:

Bioconcentration factor (BCF):

Plants: Triazine-tolerate plants (eg maize) rapidly de-chlorinate terbuthylazine to hydroxy terbuthylazine. Various amounts of de-ethylated and hydroxy de-ethylated terbuthylazine are produced, depending on the plant species.

Soil/Environment: Adsorption onto soils is strong; Koc 162-278, Kd 2.2-25 are typical values for light agricultural soils. Terbuthylazine is only slightly mobile. Microbial degradation proceeds mainly by de-ethylation and hydroxylation with eventual ring cleavage. DT50 30-60 days in biologically active soil.

28 REGISTERED CROPS:

See HerbiGuide Species Solution tab.

29 REGISTERED WEEDS:

See HerbiGuide Species Solution tab.

30 REGULATION AND LEGAL:

UN number:

CAS numbers: 5915-41-3

OPP Chemical Code:

Hazchem code:

NOHSC classification:

Land transport: ADG

Dangerous goods class (ADG): Not a dangerous good.

Sea transport: IMDG

Proper shipping name:

International Maritime Dangerous Goods Code (IMDG):

Class:

Packaging group:

EPG:

Air transport: IATA/ICAO



Risk phrases: R22, R50

Harmful if swallowed. Very toxic to aquatic organisms

Safety phrases: S13, S20, S22, S60, S24/25, S36/37.

Keep away from food, drink and animal feeding stuffs.

When using, do not eat or drink. Do not breathe dust.

This material and its container must be disposed of as hazardous waste.

Avoid contact with skin and eyes. Wear suitable protective clothing and gloves.

31 PROPERTIES:

Colour: Off white.

Odour: Faint.

Form: Granular solid.

Chemical name:

Empirical formula:

IUPAC:

CAS: 5915-41-3

Water solubility: 8.5 mg/L at 25 C at pH. Granules are wettable.

Oil solubility:

Octanol:Water ratio: LogPow = at 25 C at pH 5.

Soil organic carbon absorption coefficient (Koc): 162-278.

Vapour Pressure: Low. 0.15 mPa at 25 C.

Vapour density:

Dissociation constant: pKa

Melting point: 177-179 C.

Boiling point: Expected to decompose before boiling.

Molecular weight:

Bulk density: 1.19 for terbuthylazine. 0.28-4 for product.

Specific gravity:

Viscosity: CPS.

pH:

Flammability: Not flammable

Flashpoint: NA.

Autoignition: C.

Corrosivity:

Shelf Life: Many years. Unlikely to react or decompose.

(When Stored under Ideal Conditions)

32 SPILLS:

Sweep up spilled material. Don't allow large quantities of dust or washing water to enter water courses

33 FIRE:

Extinguish with water spray, foam, carbon dioxide or dry agent.

Toxic fumes may be released in fire. Wear breathing apparatus or avoid smoke.

Doesn't undergo polymerization reactions.

34 COMMENTS:

35 REFERENCES:

Sipcam (2009). Terbyne label.

Ashton, F.M. and Crafts, A.S. (1981) Mode of Action of Herbicides. (Wiley-Interscience publication).

Kearney, P.C. and Kaufman, D.D. (1976). Herbicides. Chemistry, degradation and mode of action. Vol 1 & 2.

Acknowledgments:

Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.