METHIDATHION

1_Trade_NameManufacturerForm
AAKO RIDACIDE 400 EC INSECTICIDEAAKO AUSTRALIA PTY LIMITEDEMULSIFIABLE CONCENTRATE
SUPRATHION 400 EC INSECTICIDEADAMA AUSTRALIA PTY LIMITEDEMULSIFIABLE CONCENTRATE

4. ACTIVE INGREDIENTS: METHIDATHION 400g/L

5. COST: $54.12 per L or kg.

6. CHEMICAL GROUP: 1B.

7. RELATED PESTICIDES:

ACEPHATE 970g/kg
AZINPHOS-METHYL 200 g/L
CHLORPYRIFOS 500g/L EC
DIAZINON 800g/L or kg
DIMETHOATE 400g/L
DIMETHOATE SD 400g/L
FENITROTHION 1000g/L
FENTHION 550g/L
MALDISON 500-1180g/L
METHAMIDOPHOS 580g/L
METHIDATHION 400g/L
OMETHOATE 290g/L
OMETHOATE 800g/L
PARATHION 450-500g/L
PHOSMET 150g/L
PROTHIOFOS 500g/L
Terbufos 150 g/kg
TRICHLORFON 500g/L

8. GENERAL DESCRIPTION:

A contact or ingested broad spectrum organophosphate insecticide and spider killer with a moderate residual life of up to 5 weeks. It is absorbed by leaves which reduces washing off by rain and helps control insects sheltering on the underside of leaves. It can be used as a bare earth treatment at higher rates with a residual life of 7-10 days or until the first heavy rain.
At 1 L/ha and after 50 mm of rain it has provided 21 days protection from Red legged Earth Mite in trials.
Previously sold as Supracide.

9. APPLICATION METHODS AND TIPS:

Mix with water.
Ensure complete even coverage.
Avoid spraying flowering crops to reduce bee losses.
Best results when applied under fine calm conditions.
Compatible with most other pesticides. Do not mix with alkaline sprays such as Bordeaux mixture or lime.
May react with other emulsifiable concentrates, dodine and calcium nitrate.

10. ADJUVANTS, WETTERS, OILS:

Dormant spraying oil recommended for some dormant Apple sprays.

11. EQUIPMENT:

Use sprayers that provide good coverage.

12. SPRAYER WASH OUT AND DECONTAMINATION:

Triple rinse with water and wetting agent. Use a boom cleaning agent.

13. WATER OR CARRIER DATA:

20-30 L/ha for aerial spraying. 50-100 L/ha for boom spraying. 250-1000 L/ha for low volume spraying. 1000-3000 L/ha for high volume spraying.

14. WEATHER:

15. RAINFASTNESS:

2-6 hours

16. SOIL:

17. PLANT HEALTH and OTHER EFFECTS:

Plant injury may occur under cool, humid or slow drying conditions.
May injure some varieties of apples.
Don't use with oil on mangoes after fruit set or on citrus.
Don't use on citrus when humidity is more than 45% or slow drying conditions exist.
Don't use on oranges or mandarins after flowering.

18. WITHHOLDING PERIODS:

Apples: Harvest - 14 days.
Cereal Crops: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Cereal Crops: Harvest - 6 weeks if grain intended for human consumption.
Citrus: Harvest - 21 days.
Cotton: Harvest - 3 days.
Custard Apples: Harvest - 7 days.
Forage Crops: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Grain Crops: Harvest - 6 weeks if grain intended for human consumption.
Grain Sorghum: Harvest - 6 weeks if grain intended for human consumption.
Grapes: Harvest - 14 days.
Lucerne: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Lupins: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Macadamia Nuts: Harvest - 21 days.
Mangoes: Harvest - 21 days.
Oilseed Crops: Harvest - 3 days.
Passionfruit: Harvest - 14 days.
Pasture: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Pears: Harvest - 14 days.
Rice: Harvest - 6 weeks if grain intended for human consumption.
Sorghum (forage): Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Stone Fruit: Harvest - 14 days.
Sunflowers - Harvest - 3 days.
Vegetables: Harvest - 7 days.
Apples: Harvest - 14 days.
Cereal Crops: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Cereal Crops: Harvest - 6 weeks if grain intended for human consumption.
Citrus: Harvest - 21 days.
Cotton: Harvest - 3 days.
Custard Apples: Harvest - 7 days.
Forage Crops: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Grain Crops: Harvest - 6 weeks if grain intended for human consumption.
Grain Sorghum: Harvest - 6 weeks if grain intended for human consumption.
Grapes: Harvest - 14 days.
Lucerne: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Lupins: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Macadamia Nuts: Harvest - 21 days.
Mangoes: Harvest - 21 days.
Oilseed Crops: Harvest - 3 days.
Passionfruit: Harvest - 14 days.
Pasture: Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Pears: Harvest - 14 days.
Rice: Harvest - 6 weeks if grain intended for human consumption.
Sorghum (forage): Cutting and grazing - 1 day for rates <90 mL/ha, 7 days for rates >90 mL/ha.
Stone Fruit: Harvest - 14 days.
Sunflowers - Harvest - 3 days.
Vegetables: Harvest - 7 days.

19. PLANT BACK PERIODS or RECROPPING INTERVALS:

20. MODE OF ACTION:

Active by contact and ingestion for insects. It has a rapid knockdown action. Rapidly absorbed and distributed within the plant to kill sucking and chewing insects. Plants break it down relatively quickly which reduces it residual life. Acts on the insects nervous system.
In cold weather (below 12oC) the speed of knockdown is slower but overall activity is not usually affected.
Active by contact and ingestion for insects. Acts on the insects nervous system.
A group 1B, organophosphate, systemic insecticide that acts as an acetylcholine esterase inhibitor.

21. PESTICIDE RESISTANCE:

Insects tolerant to organophosphate sprays have developed after multiple applications.

22. TOXICITY:

Poison schedule - S6
Summary: Highly toxic and hazardous.
Details:
Poison schedule - S7
Mammalian toxicity - Extremely toxic.
Acute oral LD50 - 20-54 mg/kg. Highly toxic.
Acute dermal LD50 - 1546 mg/kg. Moderately toxic.
Vapour inhalation - LC50 3.6 mg/L. Highly toxic. Slight irritant.
Skin - Slight irritant. Non sensitising. Can be rapidly absorbed through the skin causing poisoning.
Eye - Slight irritant.
Main exposure routes - Handling concentrate. Air blast application.
Chronic oral toxicity NOEL - ppm for two years.
Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).
Acceptable Daily Intake (ADI) -
Poisoning can occur due to cholinesterase inhibition.

23. TOXICITY SYMPTOMS:

Initial symptoms include headache, nausea, lack of appetite and fatigue during exposure or several hours later. Dizziness, vomiting, stomach pains, contracted pupils, muscle weakness, twitching, tremor, slow heart beat, blurred vision and sweating may occur with higher exposure levels.
Continual low level exposure may cause influenza like symptoms.

24. FIRST AID:

Contact a doctor or poison information centre on 008 119 244.
Give atropine (0.6mg) tablets every quarter hour then every half hour until signs of flushed face, dilated pupils, dry mouth and fast pulse appear. Medical attention must be sought after taking atropine.
Remove contaminated clothing and wash skin.
If breathing has stopped apply resuscitation
Poisoning usually occurs through skin absorption. Effects are cumulative and dangerous levels may develop before symptoms become noticeable. If you are exposed to organophosphate for more than 30 hours per month then levels of acetylcholinesterase enzyme should be regularly checked. If levels drop below 60% of normal then work with organophosphates should stop until levels improve. This may take several weeks.
Advice to doctor - Treat as a potent cholinesterase inhibitor. Atropine sulphate is antidotal.

25. PROTECTIVE CLOTHING:

Safety goggles and face shield.
Elbow length PVC gloves.
Cotton overalls and washable hat.
Boots.

26 RE ENTRY PERIODS and OTHER SAFETY ISSUES:

Do not enter treated areas for 48 hours after spraying.

27. PROPERTIES:

Product appearance - Hazy yeloow viscous liquid with a strong odour.
Shelf Life -
Product Flammability - Non flammable. Non explosive. Combustible. Flashpoint >70C
Half life in water - days at pH5 and 35 C.
Water solubility at 25 C. - emulsifiable.
Oil solubility -
Octanol:Water ratio at 25 C. - at pH 5.
Vapour Pressure at 25 C. -
Dissociation constant - pKa.
Melting point - C.
Boiling point -
Molecular weight -
Density - Specific gravity 1.203 at 20C
pH - 3-7.
Corrosivity - Non corrosive.

28. ENVIRONMENTAL FATE:

Summary - Highly toxic to aquatic organisms and bees. Affects beneficial insects.
Birds - Moderaately toxic. LD50 is mg/kg.
Fish - Extremely toxic. LC50 is ppm.
Invertebrates - Extremely toxic. LC50 is
Bees - Highly toxic.
It has a half life in soil of .
It has an EPA classification for soil mobility that ranges from
Ground water contamination
Accumulation in milk and tissues.

29. COMPATIBILITY:

See HerbiGuide for compatibility with other herbicides, insecticides and fungicides.
See HerbiGuide for a full list of pesticide compatibilities.
Compatible with spray oil.

30. REGISTERED CROPS, INSECTS and DISEASES.

See HerbiGuide Species Solutions Tab for registered uses.

31. GOVERNMENT AND REGULATORY INFORMATION:

Dangerous Goods Class - 6.1 ORGANOPHOSPHORUS PESTICIDE, LIQUID, TOXIC (CONTAINS METHIDATHION), MARINE POLLUTANT
Hazchem Code - 2X
Packaging Group - 2
EPG -
UN Number - 3018
Worksafe Classification -

32. References:

33041/0801

Acknowledgments:

Collated by HerbiGuide. Phone 08 98444064 or www.HerbiGuide.com.au for more information.