3 ACTIVE INGREDIENTS: Chloridazon 650g/kg as a powder.
4 CHEMICAL GROUP: C. Herbicide. Pyridazinone.
5 RELATED HERBICIDES:
6 GENERAL DESCRIPTION:
A selective, residual, root absorbed, herbicide that control weeds as they germinate.
7 APPLICATION METHODS AND TIPS:
Apply on the day of sowing or soon after, before the crop and weeds emerge. It requires moist soil. If the soil is dry then irrigation or rain must follow within 10 days of application. Irrigation should not exceed 35 mm/week. It is often applied as a 10-20 cm band application and mechanical weed control used on the inter row areas.
10 WATER QUALITY:
Hard water
Colloids
pH
11 COMPATIBILITY:
Trace elements.
14 HERBICIDE RESISTANCE:
15 REPLANTING INTERVALS:
Crop
Time
Potatoes, onions, maize, sorghum, safflower and sunflower - less than 4 to 8 weeks.
Cucumbers, melons, tomatoes, snap beans, Lima beans, lettuce, cabbages, grapes, carrots, spinach - more than 4 to 8 weeks.
16 WITHHOLDING PERIODS:
Crop
Type
Time
All
Harvest
All
Grazing
17 RE-ENTRY PERIOD:
18 PROTECTIVE CLOTHING:
19 SOIL:
20 MODE OF ACTION:
Inhibits photosynthesis at phot system II.
Uptake and translocation:
Absorbed mainly through the roots.
Physiological effects:
Residual Life and Breakdown:
Selectivity:
23 PLANT SYMPTOMS:
Plants usually emerge then take up the herbicide and die.
SECONDARY EFFECTS:
24 TOXICITY:
Summary:
Details:
Mammalian toxicity -
Acute oral LD50 - mg/kg (rats), [For comparison table salt is 3000 mg/kg]
Acute dermal LD50 - > mg/kg (rabbit).
Skin -
Eye -
Vapour inhalation - LC50 - > mg/L air (rat).
Chronic oral toxicity NOEL - ppm for two years.
Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).
Other Species -
Birds - toxicity.
Fish - toxicity LC50 > ppm.
Invertebrates - toxicity.
Bees - toxicity.
25 TOXICITY SYMPTOMS:
26 FIRST AID:
27 ENVIRONMENTAL FATE:
It has a half life in soil of .
It has an EPA classification for soil mobility that ranges from
Ground water contamination
Replanting intervals
Accumulation in milk and tissues.
31 PROPERTIES:
Water solubility at 25 C. - ppm at pH ;
Oil solubility -
Octanol:Water ratio at 25 C. - at pH 5;
Vapour Pressure at 25 C. -
Dissociation constant - pKa
Melting point - C.
Molecular weight -
Half life in water - days at pH5 and 35 C.
33 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.
Acknowledgments:
Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.