Pendimethalin

Rates quoted in HerbiGuide are for the 440g/L formulations. Multiply rate by 1.33 if using 330g/L formulations or by 0.96 if using the 455g/L formulations.
1 Trade nameManufacturerForm
4FARMERS PENDIMETHALIN 330 HERBICIDE4 FARMERS AUSTRALIA PTY LTDEMULSIFIABLE CONCENTRATE
CAMPBELL CRONOS 440EC HERBICIDECOLIN CAMPBELL (CHEMICALS) PTY LTDEMULSIFIABLE CONCENTRATE
CONQUEST CHARGER 330 EC HERBICIDECONQUEST CROP PROTECTION PTY LTDEMULSIFIABLE CONCENTRATE
CROP CARE ROMPER 440EC HERBICIDECROP CARE AUSTRALASIA PTY LTDEMULSIFIABLE CONCENTRATE
CYCLONE 440EC HERBICIDEIMTRADE AUSTRALIA PTY LTDEMULSIFIABLE CONCENTRATE
ECHEM PENDIMETHALIN 330 HERBICIDEECHEM (AUST) PTY LIMITEDEMULSIFIABLE CONCENTRATE
FARMOZ PENDIMETHEX HERBICIDEADAMA AUSTRALIA PTY LIMITEDEMULSIFIABLE CONCENTRATE
FIST 330 HERBICIDEUPL AUSTRALIA LIMITEDEMULSIFIABLE CONCENTRATE
Fist HydroCap HerbicideUPL AUSTRALIA LIMITEDCAPSULE SUSPENSION
FMC PENDIMETHALIN 440 EC HERBICIDEFMC AUSTRALASIA PTY LTDEMULSIFIABLE CONCENTRATE
HALLEY PENDIMETHALIN 330 HERBICIDEHALLEY INTERNATIONAL ENTERPRISE (AUSTRALIA) PTY LTDEMULSIFIABLE CONCENTRATE
I.PI.CI. IPIMETHALIN 330 HERBICIDEFINCHIMICA S.P.A.EMULSIFIABLE CONCENTRATE
IMTRADE CYCLONE 330 EC HERBICIDEIMTRADE AUSTRALIA PTY LTDEMULSIFIABLE CONCENTRATE
KENSO AGCARE PENDI 330 SELECTIVE HERBICIDEKENSO CORPORATION (M) SDN. BHD.EMULSIFIABLE CONCENTRATE
PENDANT HERBICIDEAMGROW PTY LTDEMULSIFIABLE CONCENTRATE
RAINBOW PENDIMETHALIN 330EC HERBICIDESHANDONG RAINBOW INTERNATIONAL CO., LTD.EMULSIFIABLE CONCENTRATE
RALLIS PENDIMETHALIN 330 EC HERBICIDERALLIS INDIA LIMITEDEMULSIFIABLE CONCENTRATE
Relyon Stark 440EC HerbicideRURALCO HOLDINGS LIMITEDEMULSIFIABLE CONCENTRATE
RIFLE 440 HERBICIDECROP CARE AUSTRALASIA PTY LTDEMULSIFIABLE CONCENTRATE
SABAKEM PENDIMETHALIN 330EC HERBICIDESABAKEM PTY LTDEMULSIFIABLE CONCENTRATE
STOMP 440 HERBICIDEBASF AUSTRALIA LTD.EMULSIFIABLE CONCENTRATE
STOMP AQUA HERBICIDEBASF AUSTRALIA LTD.CAPSULE SUSPENSION
STOMP* XTRA HERBICIDEBASF AUSTRALIA LTD.CAPSULE SUSPENSION
TITAN PENDIMETHALIN 330 HERBICIDETITAN AG PTY LTDEMULSIFIABLE CONCENTRATE
YASTAR 330EC HERBICIDEJIANGSU YONGAN CHEMICAL CO., LTDEMULSIFIABLE CONCENTRATE


2 PRICE:

$9.09/L


3 ACTIVE INGREDIENTS: Pendimethalin 330, 400, 440 or 455g/L


4 CHEMICAL GROUP: D


5 RELATED HERBICIDES:

ChlorthalChlorthal 750g/kg
Oryzalin plus trifluralinOryzalin 125g/L + Trifluralin 125g/L
PendimethalinPendimethalin 330, 400, 440 or 455g/L
ProdiamineProdiamine 480g/L
Propyzamide 500Propyzamide 500g/kg or L
SurflanOryzalin 500 g/L
Trifluralin 480Trifluralin 480-500g/L


6 GENERAL DESCRIPTION:

A pre emergence, selective herbicide for control of grasses and some broad-leaved weeds in cereals and broad-leaved crops.

7 APPLICATION METHODS AND TIPS:

Do not use on areas prone to waterlogging as crop damage may occur.

Use higher rates on heavy or high organic matter soils. Use lower rates on light soils.

Incorporate with weighted harrows followed by a cross working with a combine within 24 hours of application if using low rates. Use higher rates if rain or irrigation is used to incorporate the herbicide or incorporation is made with a combine when seeding..

Best results on a fine textured, well prepared seed beds, free of clods and crop residues. All crop residues must be incorporated into the soil prior to application. Crop injury may result if pendimethalin is applied to a poorly prepared seed beds. Generally incorporation will increase activity against monocotyledonous (grassy) plants but reduces effectiveness on dicotyledonous (broad-leaved) species because of the relative location of sensitive meristem. Can be applied pre plant with shallow incorporation or pre plant with subsequent incorporation during sowing. Incorporation can be done up to 4 weeks prior to sowing. To avoid phytotoxicity, ensure seeds are sown below the treated zone.

Pendimethalin does not control perennial or well established weeds.

More crop damage may occur where cereal seed dressings that reduce coleoptile length have been used.

8 WEATHER:

Rainfast immediately.

Frost effects: Frost before or during application has little effect

Frost after application with cold wet conditions may result in increased crop injury because the crop coleoptile remains in the herbicide treated band for a longer period.

Wind:

Inversions: Drift from inversion conditions rarely has significant consequences.

Temperature:

Delta T and relative humidity: Avoid application when Delta T is greater than

Soil moisture at application: Best results if soil is moist. Dry conditions following application are likely to result in reduced weed control.

9 ADJUVANTS:

Wetting agents: None required.

Spray oils: None required.

10 WATER QUALITY:

Hard water: Little effect unless very hard water causes formulation to separate in the tank. Do a jar test if in doubt.

Salty water: Little effect unless very salty water causes formulation to separate in the tank. Do a jar test if in doubt.

Colloids: Little effect.

pH: Little effect.

Tank life: Several weeks.

11 COMPATIBILITY:

Not normally compatible with Flexi-N as EC formulations tend to separate in the tank. Compatibility may be improved by diluting Flexi-N with water and ensuring good and continuous agitation.

Trace elements.

See HerbiGuide Compatibilities button.

Do NOT use Stomp mixed with flowable atrazine on heavy clay soils.

Also compatible with Cotoran (fluometuron).

12 EQUIPMENT:

Boom sprays:

Carrier volume: 50-250 L/ha. Not critical.

Nozzles: Flat fan to deliver 50-350 L/ha. Not critical.

Filters: 50-100 mesh. Not critical.

Pressure: 150-400 kPa.

Droplet size: 180-300 micron. Not critical.

Aerial application:

Carrier volume: 25-60 L/ha. Not critical.

Droplet size: 180-300 micron. Not critical.

13 SPRAYER DECONTAMINATION:

Clean Up:

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

Remove filters and clean separately. Triple rinse with water or water plus 0.25% wetting agent and run through boom.

Decontamination:

Remove filters and clean separately.

Rinse with water and drain.

Quarter fill the tank with an alkali detergent (eg 500 mL or g of Drive, Dynamo, Omo, or Surf per 100 L water) and circulate for at least 15 minutes then run through boom. Rinse twice with water.

14 HERBICIDE RESISTANCE:

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

15 REPLANTING INTERVALS:

CropTime
Beans; French2 months.
Beetroot (Red beet)12 months.
Brassicas; transplanted2 months.
Broccoli5 months.
Brussels sprouts5 months.
Cabbage5 months.
Capsicums; Transplanted2 months.
Carrots2 months.
Cauliflower5 months.
Celery2 months.
Cucumbers5 months.
Leeks5 months.
Lettuce5 months.
Lettuce; transplanted2 months.
Melons5 months.
Millet12 months
Onions5 months.
Parsley2 months.
Parsnips2 months.
Peas2 months.
Poppy12 months.
Potatoes2 months.
Pumpkins5 months.
Radish5 months.
Silverbeet12 months.
Sorghum12 months
Spinach12 months.
Squash5 months.
Sweet Corn5 months.
Tomatoes; Transplanted2 months.
Turnips5 months.
Other cropsNot usually required providing crop is planted below the treated band.

16 WITHHOLDING PERIODS:

CropTypeTime
AllGrazingNot required when used as directed.
AllHarvestNot required when used as directed.

17 RE-ENTRY PERIOD:

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. Don't inhale the spray mist.

19 SOIL:

Soil texture: The finer the soil texture is, the heavier the rate of Stomp application must be.

Soil pH: Little effect.

Soil organic matter: Pendimethalin activity could be decreased on soils with more than 6% organic matter. Do not use Stomp on peat or muck soil.

Stubble cover greater than 40% will result in a decrease in weed control.

Soil Moisture at Application: Pendimethalin efficacy is decreased under dry or waterlogged conditions. Best results on moist soil with light rains within a few days of application.

20 MODE OF ACTION:

Pre-emergent. Inhibits seedling development and has little effect on established plants.

Uptake and translocation:

Root absorbed and absorbed by the emerging shoot.

Physiological effects:

Inhibits microtubule assembly.

Residual Life and Breakdown:

Half life is around 70 days in normal field situations.

21 SELECTIVITY:

Crop tolerance:

Crop damage may occur if waterlogging follows application especially for cereals.

Vetch appears to be sensitive to pre em applications1311.

Varietal sensitivities:

Effect on Clover Species:

Little effect.

Effect on Medic Species:

Little effect.

Effect on Lucerne:

Little effect.

Effect on Native Plants:

Little effect on established natives and Fabaceae species.

22 DISEASE AND INSECT EFFECTS:

Occasionally crop damage may be worse where root diseases are present.

23 PLANT SYMPTOMS:

Plants may emerge then die back within 14-28 days after application.

SECONDARY EFFECTS:

24 TOXICITY:

Summary:

Low toxicity to mammals, birds and bees. Toxic to fish.

Harmful if swallowed. May irritate eyes, throat and skin.

Details:

Poison schedule: S5.

Mammalian toxicity: Low.

Acute oral LD50: >5000 mg/kg (rat) for pendimethalin. [For comparison table salt is 3000 mg/kg] The concentrate is of low toxicity if swallowed.

Acute dermal LD50: >2000 mg/kg (rat) for pendimethalin.

Skin: Not irritating. Prolonged repeated contact may cause sensitization. The concentrate is not considered a serious toxic hazard.

Prolonged contact with the concentrate can cause defatting of the skin and may

result in dermatitis.

Eye: Irritating. The concentrate may cause irritation after short contact with the eyes, but permanent damage is not anticipated.

Vapour inhalation: LC50 >320 mg/L air (rat). If aspirated into the lung, e.g. from vomiting, the presence of solvent may result in chemical pneumonitis or other lung damage.

Chronic oral toxicity: NOEL mg/kg for two years. Chronic Effects Based on available data, repeated exposures are not anticipated to cause additional significant adverse effects.

Not mutagenic or teratogenic in animal studies (i.e. does not cause or reproductive problems in animal tests).

Carcinogenicity: A marked depression in body weight and a statistically significant increase in benign thyroid tumours (follicular adenomas) were observed at the highest dose level (5000ppm) in a lifetime (24 month) rat study, not considered to be relevant to humans.

NOEL: 12 mg/kg/day.

Acceptable Daily Intake (ADI): 0.1 mg/kg/day.

Other Species:

Dangerous to fish and other aquatic life.

Birds: Low toxicity. LC50 (8day) = 4187 mg/kg (bobwhite quail).

LD50 = 10388 mg/kg (mallard duck).

Fish: Toxic. LC50 (96 hour) > 0.14 mg/L (Rainbow trout), 0.2 mg/L (bluegill sunfish), 0.42 mg/L (channel catfish).

Invertebrates: toxicity.

Bees: Not toxic to bees. LD50 >100 µg/bee.

Arthropods: toxicity.

Earthworms:

Algae:

Accumulation:

25 TOXICITY SYMPTOMS:

Volatile solvents may irritate eyes and throat and cause dizziness and headache when handling the concentrate.

26 FIRST AID:

If SWALLOWED: Do NOT induce vomiting. Give a glass of water or milk to sip. Do NOT give anything by mouth to a semiconscious or unconscious patient.

If in EYES: Irrigate with plenty of water for 5 minutes. Remove contact lenses if present. Irrigate for at least another 10 minutes.

If on SKIN: Rinse with plenty of water, remove contaminated clothing, wash with soap and water.

If INHALED: Remove patient to fresh air. Apply artificial respiration if necessary.

Advice to doctor: Treat symptomatically. If vomiting occurs, solvent present may cause pulmonary pneumonitis.

Contact the Poisons Information Centre on 131126.

27 ENVIRONMENTAL FATE:

Half life in soil - 40 days in anaerobic conditions, 1320 days in aerobic conditions. 70 days at 20 degrees and 50% WHC in Mohlin soil.

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

It has an EPA classification for soil mobility that ranges from

Ground water contamination. It has a leaching index of 0-1. (for comparison, trifluralin is 0-1 and chlorsulfuron is 25-30). Low likelihood of leaching. High likelihood of surface runoff.

Accumulation in milk and tissues.

pH stability - Stable.

Photolysis rate - <21 days. Medium.

Hydrolysis half life - 28 days.

Biodegradation rate - Slow unless under anaerobic conditions.

28 REGISTERED CROPS:

See HerbiGuide Species Solution tab.

29 REGISTERED WEEDS:

See HerbiGuide Species Solution tab.

30 REGULATION AND LEGAL:

UN number: 3082.

CAS numbers: Pendimethalin 40487-42-1. Hydrocarbon liquid 64742-94-5.

OPP Chemical Code:

Hazchem code:

NOHSC classification: Hazardous substance.

Land transport:

Dangerous goods class (ADG): Non-dangerous good.

Sea transport:

Proper shipping name: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, LIQUID, N.O.S. (contains Pendimethalin)

International Maritime Dangerous Goods Code (IMDG): marine pollutant for sea transport.

Class: 9.

Packaging group: III.

EPG:

Risk phrases:

R36 Irritating to eyes.

R43 May cause sensitization by skin contact.

R65 Harmful: may cause lung damage if swallowed.

R66 Repeated exposure may cause skin dryness and cracking.

Safety phrases:

S13 Keep away from food, drink and animal feeding stuffs.

S2 Keep out of reach of children.

S26 In case of contact with eyes, rinse immediately with plenty of water and

seek medical advice.

S36/37/39 Wear suitable protective clothing, gloves and eye/face protection.

S46 If swallowed, seek medical advice immediately and show this container or

label.

31 PROPERTIES:

Colour: Black clear liquid with a yellow-orange tinge.

Odour: Solvent odour.

Form: Liquid.

Chemical name: Pendimethalin.

Empirical formula:

IUPAC:

CAS: 40487-42-1.

Water solubility: Of active ingredient: Low. 0.27-0.33 mg/L at pH 7. 0.54 mg/L at pH4.

Product emulsifies in water forming a yellow milky emulsion.

Oil solubility:

Octanol:Water ratio at 25 C LogPow: 5.2 at pH 7;

Soil organic carbon absorption coefficient (Koc): 5000 mL/g. Strong.

Vapour Pressure: 3 x 10-5 mm HG at 25 C. Low. 4 mPa or 1.94 mPa at 250C.

Vapour density:

Dissociation constant: pKa

Melting point: Some crystallization between 0 to -70C.

Boiling point: 183-2100C for solvent.

Molecular weight:

Bulk density:

Specific gravity: 1.075.

pH:

Flammability: Combustible liquid C1.

Flashpoint: >660C.

Autoignition: C.

Pendimethalin has exothermic decomposition around 2000C.

May react violently with strong oxidizing agents.

Corrosivity:

Shelf Life: at least 2 years.

(When Stored under Ideal Conditions)

Stains (yellows) materials that it contacts.

32 SPILLS:

Extinguish possible sources of ignition.

Absorb spill with earth, sand, clay or absorbent material such as vermiculite.

Ventilate area after cleanup.

33 FIRE:

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

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

Pendimethalin has exothermic decomposition around 2000C.

May react violently with strong oxidizing agents.

No hazardous polymerization.

34 COMMENTS:

Extended storage below 50C may result in crystals forming in the bottom of the container. If this occurs, store the container on its side at room temperature and roll occasionally until crystals dissolve.

35 REFERENCES:

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.

CropCare(2007) Stomp 440 MSDS.

CropCare(2008) Stomp 440 Label.

Acknowledgments:

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