Norflurazon 800

Norflurazon 800

1 Trade name	Manufacturer	Form
ZOLIAR DF HERBICIDE	SYNGENTA CROP PROTECTION PTY LIMITED	DF

Previously sold as Solicam

3 ACTIVE INGREDIENTS: Norflurazon 800 g/kg

4 CHEMICAL GROUP: F.

Pyridazinone

5 RELATED HERBICIDES:

6 GENERAL DESCRIPTION:

A residual herbicide use mainly for pre emergence control of many broadleaf and grass species. At normal use rates it often provides weed control for more than 6 months.

7 APPLICATION METHODS AND TIPS:

10 WATER QUALITY:

Hard water

Colloids

pH

11 COMPATIBILITY:

See HerbiGuide.

14 HERBICIDE RESISTANCE:

Weeds may develop resistance to herbicides in this group.

15 REPLANTING INTERVALS:

Crop	Rates < 3.5kg/ha on medium/heavy soil	Rates > 3.5kg/ha on medium/heavy soil	Rates < 2.8kg/ha on light soil
Barley	24 months	30 months	27 months
Beans; Faba	24 months	30 months	27 months
Beans; Mung	21 months	27 months	24 months
Cereal Rye	24 months	30 months	27 months
Chickpea	3 months	9 months	6 months
Coriander	1 month	6 months	3 months
Corn	21 months	27 months	24 months
Linseed	3 months	9 months	6 months
Oats	24 months	30 months	27 months
Safflower	12 months	18 months	15 months
Sorghum	21 months	27 months	24 months
Soybeans	3 months	9 months	6 months
Sunflowers	21 months	27 months	24 months
Triticale	24 months	30 months	27 months
Wheat	24 months	30 months	27 months

Plant back periods may be longer under dry conditions or if there have been multiple applications.

16 WITHHOLDING PERIODS:

Crop	Type	Time
All	Harvest
All	Grazing	Don't graze treated areas

17 RE-ENTRY PERIOD:

18 PROTECTIVE CLOTHING:

20 MODE OF ACTION:

Norflurazon inhibits carotenoid synthesis. It also causes a progressive deterioration of the lamellae in chloroplasts and an almost complete prevention of the accumulation of the green chlorophyll pigment.

Uptake and translocation:

Translocation rates vary widely between species. It moves in the water conducting channels (xylem) only, so, nearly all movement is in an upward direction.

Physiological effects:

Residual Life and Breakdown:

Selectivity:

Plants sensitive to norflurazon tend to absorb more through their roots and translocate it more efficiently through the plant than tolerant species. Degradation of the herbicide often occurs more quickly in the sensitive species, so this is not usually the basis for selectivity.

23 PLANT SYMPTOMS:

Seedlings emerge completely yellow and die as soon as seed reserves are exhausted.

SECONDARY EFFECTS:

24 TOXICITY:

Summary:

Details:

Mammalian toxicity -

Acute oral LD50 - >8000 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:

Residual life of the herbicide in the soil is determined mainly by rate, rainfall and soil type.

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 25⁰C. - 28 ppm at pH ;

Oil solubility - Ethanol 14.2 x 10⁴ ppm.

Octanol:Water ratio at 25 C. - at pH 5;

Vapour Pressure at 20⁰C. - 2 x 10^-8mm Hg.

Dissociation constant - pKa

Melting point - 177⁰C.

Molecular weight - 303.7g

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

Technical grade product is white to light brown or light grey.

33 REFERENCES:

Ashton, F.M. and Crafts, A.S. (1981) Mode of Action of Herbicides. (Wiley-Interscience publication). P423-426.

Acknowledgments:

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