TOxICOLOGICAL PROPeRTIeS - Bayer CropScience

index 

Introduction 2 

Product formulation 2 

Toxicological properties 3 

Resistance management 4 

Biological properties 4 

Behaviour in the environment 5 

Effects on Flora and Fauna 6 

Application 7 

Directions for use 7 

Weed control – efficacy 8 

Compatibility 10 

Crop safety 13 

General instructions 16 

Safety directions 16 

INTRODUCTION 

Cheetah ® Gold is an Australian innovation 

from Bayer CropScience. Using a 

combination of existing chemistry, 

Cheetah Gold is formulated to suit local 

conditions, providing excellent control of 

annual ryegrass and wild oats in wheat 

and barley. Cheetah Gold also provides 

good suppression of annual phalaris. The 

crop safety of Cheetah Gold is enhanced 

by the addition of a crop safener in the 

formulation. 

Active constituent B: 20 g/L sethoxydim 

Chemical name: 

Structural formula 

IUPAC: (+)-(EZ)2-(1- 

ethoxyiminobutyl)-5- 

[2-(ethylthio)propyl]-3- 

hydroxycyclohex-2-enone 

CA: (+)-2-[1-(ethoxyimino)butyl]- 

5-[2[(ethylthio) propyl]-3-hyroxy- 

2-cyclohexen-1-one 

 

 

Poison schedule: 6 

 

(sethoxydim) 

Active constituent C: 13.6 g/L fenoxaprop-P-ethyl 

Chemical name: ethyl (R)-2[4(6-chloro- 

2-benzoxazolyloxy)- 

phenoxy]propanoate 


 

 

 

 

(fenoxaprop-P-ethyl) 

PRODUCT FORMULATION 

 

Active ingredients 

Formulation type: 

 

 

Trade name: Cheetah Gold 

Formulation: Emulsifiable concentrate (EC) 

Active constituents: A. 200 g/L diclofop-methyl 

 

B. 20 g/L sethoxydim 

C. 13.6 g/L fenoxaprop-P-ethyl 

Physical properties 

Formulated product (Cheetah Gold): 

Appearance: Clear brown liquid 

Active constituent A: 200 g/L diclofop-methyl 

Odour: 

Aromatic hydrocarbon 

Chemical name: 2-[4-(2,4-dichlorophenoxy)- 

phenoxy]propanoic acid methyl 

Flash point: >63°C (closed cup) 

ester 

Corrosiveness: Not corrosive to glass bottles & 

steel containers with polyethylene 


coating inside. 

Specific gravity: 1.004 at 20°C 

Dangerous good: Not classified as a dangerous 

 

good for road and rail transport. 

Solubility in water: Emulsifies in water 

 

(diclofop-methyl) 

 

 

 

 

 

 

 

 

 

TOXICOLOGICAL 

PROPERTIES 

Oral LD 50 (rat): 



Dermal LD 50 (rat): 



Inhalation LC 50 

(rat) (4 h): 


(rat) (4 h): 


(rat) (4 h): 

Skin irritation: 

Eye irritation: 

512 mg/kg (diclofop-methyl) 

2676 mg/kg (sethoxydim) 

>3150–4000 mg/kg (fenoxaprop- 

P-ethyl) 

>2000 mg/kg (diclofop-methyl) 

>5000 mg/kg (sethoxydim) 

>2000 mg/kg (fenoxaprop-P-ethyl) 

>1.36 mg/L (diclofop-methyl) 

>6.28 mg/L (sethoxydim) 

>0.6 mg/L (fenoxaprop-P-ethyl) 

Non-irritating (rabbit) 

Non-irritating (rabbit)

RESISTANCE MANAGEMENT 

Resistant weeds warning 

group A herbicide 

Cheetah Gold Selective Herbicide is a member of the 

aryloxyphenoxypropionate (‘fop’) and cyclohexanedione 

(‘dim’) group of herbicides. Cheetah Gold is an inhibitor 

of acetyl-CoA carboxylase. For weed resistance 

management, Cheetah Gold is a Group A herbicide. 

Some naturally occurring biotypes resistant to Cheetah 

Gold and other Group A herbicides may exist through 

normal genetic variability in any weed population. The 

resistant individuals can eventually dominate the weed 

population if these herbicides are used repeatedly. 

These resistant weeds will not be controlled by Cheetah 

Gold or other Group A herbicides. Since occurrence of 

resistant weeds is difficult to detect prior to use, Bayer 

CropScience Pty Ltd accepts no liability for any losses 

that may result from the failure of Cheetah Gold to 

control resistant weeds. 

BIOLOGICAL PROPERTIES 

Mode of Action 

Diclofop-methyl – activity 

Diclofop-methyl is primarily taken up through the leaves 

and is very quickly transformed to the more phytotoxic 

diclofop. The active ingredient is also translocated in 

this form in the plant. Penetration and uptake through 

the roots is also possible, provided the soil is sufficiently 

moist and the application rate relatively high. 

The actual site of action is the growing point where 

the apical meristem cells are damaged. It is therefore 

desirable that the herbicide is deposited near the 

growing point. 

Diclofop-methyl and diclofop alters cell membrane 

functions, prohibiting the translocation of assimilates. 

Lipid biosynthesis in the chloroplasts is blocked, which 

inhibits plant growth. The chlorophyll content is also 

reduced, because the damage to the chloroplast inhibits 

photosynthesis. 

Diclofop-methyl – uptake and translocation 

Diclofop-methyl is absorbed by the leaves and, to some 

extent, by roots. Up to 90% of the product can be 

absorbed by the leaves within 24 hours. There is virtually 

no translocation from sprayed leaves to new leaves, 

and very little from roots to leaves. Translocation from 

sprayed leaves to the meristematic area does occur, but 

is limited (approximately 95% can still be found at the 

site of application after 96 hours). 

Sethoxydim – activity 

The primary mechanism of action of sethoxydim is by 

interfering with the lipid metabolism within the plant. 

Lipid biosynthesis in the chloroplasts are blocked, 

inhibiting growth. The resulting chloroplast damage 

inhibits photosynthesis and reduces chlorophyll. 

Sethoxydim – uptake and translocation 

Sethoxydim is absorbed by the leaves of the emerged 

grassweeds and, once inside the plant, rapidly 

translocates both acropetally and basipetally throughout 

the meristematic region (or growing point). Negligible 

amounts of sethoxydim are translocated to the roots. 

Fenoxaprop-P-ethyl – activity 

Fenoxaprop-P-ethyl is primarily absorbed through the 

plant leaves and exhibits limited movement in both 

the xylem and phloem. The actual site of action is the 

meristematic tissue of the shoot. 

Once in the plant, fenoxaprop-P-ethyl is quickly 

converted into the free D+ acid fenoxaprop, which 

inhibits the biosynthesis of fatty acids. The further 

formation of cell membranes in the growing points of 

the weed plants is prevented, leading to plant death. 

The inhibition of fatty acid biosynthesis leads to other 

changes within the weed plant, such as a reduction in 

the chlorophyll content due to a reduction of thylacoid 

membranes, as well as an increase in soluble sugars 

and free amino acids in the stem tissues of the 

grassweed plants. 

Fenoxaprop-P-ethyl – uptake and translocation 

Fenoxaprop-P-ethyl is taken up by the green plant 

tissue and transported to the growing points of the leaf 

bases, stems and roots. Within the plant, the active 

ingredient is rapidly split into the free acid, which is 

the compound with the main herbicidal efficacy. The 

herbicidal effect of the treatment will be improved if 

the spray is applied as close as possible to the sites of 

action, and particular attention to application technique 

is therefore advised. 

Symptoms 

After application of Cheetah Gold, grassweeds cease 

growth within 2–3 days and chlorosis is observed in the 

new leaves. Yellowish/purplish patches appear after 

7–10 days (depending on temperature) because of the 

chloroplast damage (reduced chlorophyll content) and 

the accumulation of anthocyanin pigments. Transport of 

assimilates (e.g. carbohydrates) to the roots is inhibited 

and the growth of the plant stagnates. After 14–21 days, 

all grassweed tissue is damaged and complete necrosis 

occurs. Grassweeds can be easily pulled from the 

ground because the roots have stopped growing and 

the growing point is dead. 

BEHAVIOUR IN THE 

ENVIRONMENT 

In crop 

Diclofop-methyl 

After absorption of the substance by the green leaf 

tissue, diclofop-methyl is hydrolysed to the free acid 

diclofop, which is then converted into hydroxylated 

metabolites and further metabolised by the plant. 

Sethoxydim 

Breakdown in plants follows a similar path as in soil 

and animals, where the active is broken down rapidly 

into metabolites. Sethoxydim degradation is particularly 

enhanced by ultraviolet light, mixing with water, and 

adsorption onto solid surfaces such as soil. 

Fenoxaprop-P-ethyl 

Fenoxaprop-P-ethyl is taken up rapidly by the plants 

through the leaves and stem and transported to the 

sites of action. Further degradation takes place by the 

splitting of the benzoxazolyloxy-phenoxy bond. The 

resulting metabolites have no herbicidal properties and 

are rapidly bound to substances in the plant such as 

glucose. 

In soil 


During periods of warm weather and with adequate soil 

moisture, diclofop-methyl is quickly converted to the 

free acid diclofop (DT 50

In water 


Slowly hydrolysed. Breakdown in water is dependent 

upon pH, microbial content, oxygen, light and 

suspended particles. The purer the water, the slower the 

breakdown. 

Sethoxydim 

Has a short half-life at low pH levels (acidic conditions), 

but is very stable in alkaline conditions. Photolysis in 

water occurs in less than one hour. 


Degradation studies have shown that, thanks to its 

strong adsorption, fenoxaprop-P-ethyl is quickly 

removed from water in water/sediment systems. In 

water it is also very rapidly degraded by photolysis (halflife 

1 day). Hydrolysis to the free acid, with a half-life 

of less than 1 day, is also very rapid. The free acid was 

degraded in water/sediment with half-lives of 13 to 20 

days. 

EFFECTS ON FLORA AND 

FAUNA 

Environment 

Cheetah Gold is dangerous to fish and other aquatic 

organisms. It is of low toxicity to birds, bees and 

earthworms. 

DO NOT contaminate streams, rivers or waterways with 

Cheetah Gold or the used containers. 

In animals 


After oral uptake by rats, diclofop-methyl is rapidly 

excreted via the faeces and urine (89% within 2 days). 

The excretion takes place in the form of unchanged 

active ingredient (up to 20%) as well as conjugated 

metabolites. 

Diclofop-methyl does not accumulate in animal tissues. 

Sethoxydim 

Degradation in animals follows similar paths to 

degradation in soil and plants, where the active is 

broken down rapidly into metabolites. 


Metabolism studies with radioactively labelled active 

ingredient in rats showed that over 80% of the 

administered product was excreted two days after 

oral administration of 10 mg active ingredient/kg body 

weight. Excretion was almost complete after seven 

days. The metabolites identified were the same as those 

in plants and soil. 

Fish species Study type/duration LC 50 (mg/L) 

Diclofop-methyl Blue gill sunfish (Lepomis macrochirus) Static acute (96-h) 0.24 mg/L 

Sethoxydim 

Carp (Barbodes) 

Rainbow trout (Oncorhynchus mykiss) 

Static acute (48-h) 

Static acute (48-h) 

153 mg/L 

38 mg/L 

Fenoxaprop-P-ethyl Rainbow trout (Oncorhynchus mykiss) 96-h 0.57 mg/L 

Fish food organisms (invertebrates) Study type/duration EC 50 (mg/L) 

Diclofop-methyl Water flea (Daphnia magna) Static acute (48-h) 0.23 mg/L 

Sethoxydim Water flea (Daphnia magna) Static acute (3-h) 1.5 mg/L 

Fenoxaprop-P-ethyl Water flea (Daphnia magna) Static acute (48-h) 1.058 mg/L 

Bird species Study type/duration LD 50 (mg/L) 

Diclofop-methyl Japanese quail (Coturnix japonica) 14-day acute oral >10000 mg/L 

Sethoxydim Japanese quail (Coturnix japonica) 14-day acute oral >5000 mg/kg 

Fenoxaprop-P-ethyl Japanese quail (Coturnix japonica) Acute oral >2000 mg/kg 

APPLICATION 

Application of Cheetah Gold should be directed at the 

base (meristematic tissue or growing tip) of the weed for 

good results (as shown by the diagram below). It is also 

important to use the right combination of type and size 

of nozzle and correct droplet size, with adequate spray 

volume and pressure. Use small droplets (200 to 300 

microns) and aim for a droplet density of approximately 

25 to 50 droplets per cm 2 . 

 

 

 

 

 

 

 

Mixing: 

Add the required quantity of Cheetah Gold directly to 

the spray tank when about two-thirds full. Top up with 

water to the required volume, with agitation operating 

after adding broadleaf herbicides if required. 

 

Surfactant: 

Uptake ® 0.5% v/v or Hasten ® 1% v/v 

Rainfast: 

4 hours 

Water quality: 

Diclofop-methyl and fenoxaprop-P-ethyl are unstable 

in alkaline conditions, while sethoxydim is unstable in 

acidic conditions. Clean water with water hardness of 

DIRECTIONS FOR USE 

 

1000 ppm or less with a neutral pH (pH 7) is ideal. Do not 

leave Cheetah Gold mixed in the tank for prolonged 

periods (greater than 6 hours). 

Ground-rig application 

Only standard boom sprays are recommended and they 

must be fitted with by-pass or mechanical agitation. 

Do not apply with boomless jets or misters. 

Trials over past years have clearly shown which conditions 

produce more consistent and reliable results: 

• Higher water volumes (i.e. 60 to 100 L/ha) were more 

consistent than 30 to 40 L/ha. 

• Slower speeds (i.e. 10 to 15 km/hr) were more 

consistent than faster speeds (18 to 24 km/hr). 

• Wide-angle nozzles (i.e. 110° flat-fan jets) were more 

consistent than 80° jets. 

On the basis of this work, and experience with the 

product, we strongly suggest the following: 

Nozzles: Use 110° nozzles set up as the 

manufacturers recommend, i.e. Spraying 

Systems nozzles 11002 at 50 cm spacings 

for single overlap in order to achieve a 

droplet size of 200–300 microns. This 

equates to a FINE/MEDIUM spray as 

defined by the ASAE S572 Standard. 

Nozzles creating coarse or very coarse 

spray qualities have not been thoroughly 

investigated at this time and cannot be 

recommended. 

Speed: Maximum 16 km/hr to avoid excessive 

boom instability. 

Pressure: 280 to 300 kPa (approx. 40 to 43 psi). 

Water volumes: Minimum 50 L/ha up to 150 L/ha. 

Aerial application 

Cheetah Gold is not recommended for aerial application, 

because of the high risk associated with overlap. 

Restraints 

DO NOT apply to any crop other than barley or wheat. 

DO NOT apply to crops that are physically damaged (e.g. by hail, wind, insect attack). 

DO NOT allow spray overlap or double-spraying of corners. 

DO NOT apply to weeds or crops under stress due to for example, very dry, very wet, nutrient-deficient, frosty or 

diseased conditions, or as the result of a previous herbicide or foliar fertiliser treatment (see also General Instructions 

on the product label for further detail). 

DO NOT apply if rainfall is expected within 4 hours. 

Crop Weed State Weed stage Rate (L/ha) Critical comments 

Barley, 

wheat 

Wild oats 

(Avena spp.), 

Annual ryegrass 

(Lolium rigidum) 

Suppression of 

annual phalaris 

(Phalaris paradoxa) 

Qld, NSW, 

ACT, Vic, 

Tas, SA, 

WA, only 

2–leaf to 

2–tiller 

(Z12 to Z14, 

22) 

1.0 Apply generally 3 to 6 weeks after sowing 

when the crop is usually 2–leaf to 2–tiller 

(Z12 to Z14, 22) 

Cheetah Gold must be mixed with one of the 

following adjuvants: 

Uptake at 0.5% v/v or Hasten at 1.0% v/v.

WEED CONTROL – EFFICACY 

The efficacy of Cheetah Gold is related to growing 

conditions. Results under poor growth situations (e.g. 

low or excess moisture, temperatures not favourable to 

weed growth or poor nutrition) may be inferior to those 

achieved under good conditions. High temperatures 

(>25°C) do not favour the growth of ryegrass, so the 

herbicidal effect may be reduced. The effect on young 

plants is always better than on old plants. 

Graph 1. Annual ryegrass control with Cheetah Gold 

% annual ryegrass control 

100 

95 

90 

85 

80 

75 

70 

65 

Cheetah Gold 

1 L/ha # 

Trial ID: 04NW16, 04VB12, 06NB01, 06NB22 

Achieve ® 

Cheetah Gold 

380 g/ha ¤ 1 L/ha # 

Trial ID: 05NW16, 05NW17, 05VA17 

Mild, wet weather encourages plant growth and 

increases the activity of Cheetah Gold. Hot, dry or 

excessively cold weather slows activity. 

Annual ryegrass 

Cheetah Gold is an excellent herbicide for the control 

of annual ryegrass. Cheetah Gold has a unique 

combination of a ‘fop’ & ‘dim’ Group A chemicals to 

provide this control in wheat and barley. 

Axial ® 

300 mL/ha* 

# Hasten 1% v/v or Uptake 0.5% v/v *Adigor ® 0.5% v/v ¤ Supercharge ® 0.75% v/v 

Cheetah Gold 

1 L/ha # 

Tristar ® Advance 

1.5 L/ha 

Trial ID: 04NW16, 04WA11, 04NB08, 04VB12, 05VA15, 05VB06, 

05NW16, 05NW17, 05VA16, 05VA17, 05NB06, 05NB04, 05NB12, 

06NB01, 06NB02, 06NB22 

Cheetah Gold is not a suitable herbicide where resistance levels to Group A products are high, with Cheetah Gold 

showing a slight improvement over Tristar Advance. 

Graph 2. Cheetah Gold versus Tristar Advance 


100 

90 

80 

70 

60 

50 

04NB08 

04VB12 

05VB06 

During 2006, a glasshouse study was conducted by 

researchers at Charles Sturt University. Ten annual 

ryegrass samples were sprayed with Cheetah Gold, 

Achieve and Axial. Five of the annual ryegrass samples 

were ‘fop’ resistant and five were both ‘fop’ and ‘dim’ 

resistant. Cheetah Gold, being a mixture of a ‘fop’ and 

‘dim’ herbicide, did not effectively control the ‘fop’ and 

‘dim’ resistant annual ryegrass, as shown by the graph 

below. Despite Achieve and Axial providing slightly 

better levels of control than Cheetah Gold, the results 

would still be considered commercially unacceptable. 

 

05VA15 

05NW16 

05NB06 

05NB04 

Trial ID 

Resistance developing 

05NW17 


05NB12 

04WA11 

05VA17 

04NW16 

05VA16 

05VB07 

Graph 3. Performance of Cheetah Gold on 

confirmed resistant annual ryegrass 

100 

90 

80 

70 

60 

50 

40 

30 

Cheetah Gold Achieve Axial 

1 L/ha # 380 g/ha ¤ 300 mL/ha* 

Trial ID: Screening of Group A resistant annual ryegrass samples to 

selected herbicies, 2006. Charles Sturt University. 

Highest 

result 

Average 

result 

Lowest 

result 

Cheetah 

Gold 

1 L/ha 

(Hasten 

1% v/v or 

Uptake 

0.5% v/v) 

Tristar 

Advance 

1.5 L/ha 

Highest 

result 

Average 

result 

Lowest 

result 

# Hasten 1% v/v *Adigor 0.5% v/v ¤ Supercharge 0.75% v/v 

Wild oats 

Cheetah Gold provides excellent control of wild oats. 

Graph 4. Wild oat control with Cheetah Gold 

% wild oat control 


100 

95 

90 

85 

80 

75 

70 

65 

100 

95 

90 

85 

80 

75 

70 

65 

Cheetah Gold 

1 L/ha # 

Trial ID: 04VB06, 04VB12, 05NB05, 05NB07, 05QG22, 

06NB01, 06NB22 

Cheetah Gold 

1 L/ha # 

Trial ID: 04ND01, 04SA43, 04NB08, 05NB05, 06NB01, 06NB02, 

06NB22 

Achieve 

Cheetah Gold 

380 g/ha ¤ 1 L/ha 

Axial 

200 mL/ha* 

Trial ID: 05ND12, 05VB07, 05QG22, 05NB11, 05NB12. 06NB01, 

06NB02, 06NB22 

# Hasten 1% v/v or Uptake 0.5% v/v *Adigor 0.5% v/v ¤ Supercharge 0.75% v/v 

Wildcat ® 

Cheetah Gold 

300 mL/ha † 1 L/ha 

# Hasten 1% v/v † BS1000 ® 0.25% v/v ** Hasten 0.5% v/v 

Annual phalaris 

Topik ® 

65 mL/ha ** 

Trial ID: 04NB08, 05NB05, 06NB01, 06NB02, 06NB22 

The performance of Cheetah Gold on annual phalaris is 

variable, as demonstrated by the control achieved in the 

trials below. Bayer CropScience can therefore only make 

a suppression claim. 

Graph 5. Annual-phalaris control with Cheetah Gold 

% annual phalaris control 

100 

95 

90 

85 

80 

75 

70 

65 

Cheetah Gold 

1 L/ha # 

Axial 

200 mL/ha* 

Trial ID: 05QG22, 05NB12, 06ND11, 06NW17, 06NB01 

# Hasten 1% v/v *Adigor 0.5% v/v 

Cheetah Gold 

1 L/ha 

Hussar ® 

200 g/ha # 

Trial ID: 04NB10, 05QG22, 05NB04, 05NB12,06ND11, 06NW17, 

06NB01, 06NB10 

Cheetah Gold 

1 L/ha # 

Tristar Advance 

1.5 L/ha 

Trial ID: 04ND01, 04NW15, 04WB13, 04VB11, 04SA43, 04QG04, 

04NB08, 04VB06, 04VB12, 05ND09, 05WA15, 05VB06, 05SA12, 

05NW14, 05ND11, 05ND12, 05VA16, 05VA17, 05VB07, 05SA15, 

05QG22, 05NB05, 05NB07, 05NB11, 05NB12, 06NB01, 06NB02, 

06NB22 

Highest 

result 

Average 

result 

Lowest 

result 

Highest 

result 

Average 

result 

Lowest 

result 

Highest 

result 

Average 

result 

Lowest 

result

COMPATIBILITY 

With mixed infestations of grass and broadleaf weeds, 

the flexibility to choose effective and economical 

combinations is crucial. 

Mixtures of Cheetah Gold with broadleaf herbicides 

may lead to a reduction in grassweed control or an 

increase in crop effects. These effects can be minimised 

by closely following all use recommendations and 

restrictions. 

Allow at least 10 days between any application of 

Cheetah Gold and herbicides containing 2,4-D, 2,4-DB, 

MCPA or dicamba, except those listed as compatible 

with Cheetah Gold e.g. Tigrex ® or MCPA LVE. Cheetah 

Gold should preferably be applied first. 

The following table summarises the current knowledge 

on compatibility. 

Graph 6. Wild oat control with mixtures of Cheetah Gold 1 L/ha and broadleaf herbicides 


100 

95 

90 

85 

80 

75 

Product Annual ryegrass Wild oats Annual phalaris 

Tigrex 750 mL # * 

Jaguar ® 750 mL^ 

* 

MCPA LVE 700 mL * 

Lontrel ® 120 g/ha * 

Eclipse ® 7 g/ha * 

Buctril ® MA 1.4 L/ha * 

Broadstrike ® 25 g/ha * 

Le-Mat ® 100 mL * 

# Equivalent to Giant ® at 900 mL/ha 

^ Equivalent to Barracuda ® at 900 mL/ha 

Trials indicate no reduction in grassweed 

control when used as recommended. Results at below 

recommended rates may indicate some reduction in 

some cases. Mixtures may be used with minimal loss 

of activity under good growing conditions, with all label 

recommendations followed. 

Trials indicate some reduction in grassweed 

control and increased crop effects at recommended 

rates, even under good growing conditions. Mixtures 

will usually result in reduced grassweed control and 

cannot be recommended unless such efficacy loss is 

accepted. Under stressed conditions results could be 

unacceptable. 

No data available. 

* Based on best information available. 

With the addition of a broadleaf herbicide to Cheetah 

Gold, the efficacy on annual ryegrass and wild oats 

can vary. Graph 6 shows the level of wild oat control 

achieved by adding a range of broadleaf herbicides. 

The range of broadleaf herbicides that can be mixed 

with Cheetah Gold to control annual phalaris is limited. 

In this situation, a true 1-OnePass ® product such as 

Hussar Selective Herbicide may need to be used. 

For information on other compatibilities contact your 

local Bayer CropScience representative. 

70 

Cheetah Gold 

1 L/ha # + Tigrex 

750 mL/ha* 

Trial ID: 06ND08, 06NW13, 06ND18, 06VB11, 06QC08 

* BS1000 0.25% v/v # Uptake 0.5% v/v 

+ Jaguar 

750 mL/ha* 

Crop safety can also be compromised with the addition 

of a broadleaf herbicide to Cheetah Gold. Graphs 7 and 

8 show the effect on crop safety of adding a range of 

broadleaf herbicides. 

+ MCPA LVE + Lontrel + Eclipse + Buctril MA + Broadstrike + Le-Mat 

700 mL/ha # 750SG 7 g/ha # 1.4 L/ha # 25 g/ha # 100 mL/ha # 

120 g/ha # 

Graph 7. Cheetah Gold plus broadleaf herbicide – maximum biomass reduction 

% maximum biomass reduction 

10 

8 

6 

4 

2 

0 

Cheetah Gold 


750 mL/ha* 

+ Jaguar 

750 mL/ha* 

Trial ID: 06NW13, 06ND18, 06ND19, 06VB11, 06ND10, 06NW15, 06ND20, 06WA15 

* BS1000 0.25% v/v # Uptake 0.5% v/v or Hasten 1.0% v/v 



120 g/ha # 

Graph 8. Cheetah Gold plus broadleaf herbicides – maximum discolouration 

20 

% discolouration 

15 

10 

5 

Cheetah Gold 


750 mL/ha* 

+ Jaguar 

750 mL/ha* 

Trial ID: 06ND08, 06NW13, 06ND18, 06ND19, 06VB11, 06QC08, 06ND10, 

06NW15, 06ND20, 06WA15 

* BS1000 0.25% v/v # Uptake 0.5% v/v or Hasten 1.0% v/v 



120 g/ha # 

10 11

Foliar fertilisers 

Glasshouse pot trials in Western Australia by Robson 

and Snowball (1989) demonstrated soil-incorporated 

diclofop-methyl (a key component of Cheetah Gold) 

could induce zinc deficiency in wheat. 

Graph 9. Wild oat control with Cheetah Gold plus foliar zinc fertiliser 


100 

95 

90 

85 

80 

75 

70 

Cheetah Gold 

1 L/ha + Uptake 0.5% v/v 

Trial ID: 05ND11, 05ND12, 05VA16, 05VA17, 05VB07, 05SA15 

Cheetah Gold 1 L/ha 

+ Uptake 0.5% v/v 

+ Twin Zinc 350 mL/ha 

Trials indicate that the addition of zinc oxide to Cheetah 

Gold has a negative impact on wildoat control, as shown 

by the graph below. 

No information is available on mixtures with other foliar 

fertilisers, and therefore cannot be recommended. 


+ Hasten 1% v/v 




Annual ryegrass control is affected less than wild oats if foliar zinc is added to Cheetah Gold. 

Graph 10. Annual ryegrass control with Cheetah Gold plus foliar zinc fertiliser 


100 

95 

90 

85 

80 

75 

70 

Cheetah Gold 

1 L/ha + Uptake 0.5% v/v 

Trial ID: 05NW16, 05NW17, 05VA16, 05VA17 

NB. VA16 and VA17 low levels of Group A resistance developing. 









Highest 

result 

Average 

result 

Lowest 

result 

Highest 

result 

Average 

result 

Lowest 

result 

CROP SAFETY 

Crop discolouration and biomass reductions 

Cheetah Gold can cause crop discolouration shortly 

after application. The typical symptoms include 

yellowing of the plant material. Diclofop-methyl 

penetrates the cuticle and epidermis rapidly, but 

translocation in the phloem is relatively slow. Movement 

in the xylem is more rapid, leading to an accumulation 

of active ingredient at the leaf tips. This can result in 

burning of the wheat and barley leaf tips. Transient 

Graph 11. Maximum crop discolouration in wheat trials – Cheetah Gold 1 L/ha 

% maximum crop discolouration 

in wheat trials 

% maximum crop discolouration 

in barley trials 

30 

25 

20 

15 

10 

5 

0 

30 

25 

20 

15 

10 

5 

0 

06ND08 

06ND06 

05WA16 

06ND10 

05ND12 

06ND19 

06ND09 

05ND09 

06NW13 

06ND17 

05ND11 

05SA12 

05WA15 

05VB07 

06NW17 

04WB13 

04ND01 

06SA55 

05VA16 

05WA12 

04ND23 

06WB08 

06NW14 

06ND11 

05NW15 

05SA15 

05NW16 

05WB07 

05WB06 

04SA44 

04SA43 

05WA14 

04WA10 

04VB12 

06ND18 

04VB09 

06NW15 

06ND07 

04VB11 

05NW17 

05WA17 

05WB05 

06NW11 

06VB06 

Adjuvant Hasten 1% v/v or Uptake 0.5% v/v 

04QG10 

04QG08 

05ND08 

05ND10 

05SA14 

05SA11 

ND32/05 

04WA11 

05WB17 

05WB27 

06ND20 

06NW08 

04SA44 

Trial ID 

Graph 12. Maximum crop discolouration in barley trials – Cheetah Gold 1 L/ha 

04ND23 

06WA14 

06SA55 

whitening at the base of new leaf emergence may occur, 

affecting new growth. 

Under cold, wet, waterlogged conditions or nutrient 

stress, these crop effects can be severe. Older leaves 

turn yellow and there is significant necrosis. New 

growth is unaffected and the crop recovers in 

about 4 weeks. In some cases new growth may show 

transient whitening and growth may be slowed. The 

maximum effect is 21–28 days after application, with 

recovery being 40–60 days after application. Where 

plants have been double-sprayed through overlap, 

effects may remain noticeable up to harvest. 

SA42/05 

04VB09 

05VA14 

05VA15 

05VB06 

05VA17 

05NW15 

05WB28 

ND31/05 

04ND21 

06WA15 

06QC08 


Trial ID 

12 13

05WB17 

Graph 13. Maximum biomass reduction in wheat trials – Cheetah Gold 1 L/ha 


20 

16 

12 

8 

4 

0 

05NW16 

05ND12 

06WB08 

06ND11 

04WB13 

05VA16 

05WA16 

04WA10 

04SA43 

05WA14 

04VB06 


05WB05 

05WB07 

06ND09 

05WA15 

04ND23 

06ND19 

04SA44 

04NW16 

05WA17 

05WB06 

06ND10 

06NW14 

06ND07 

06ND07 

06SA55 

Trial ID 

Graph 14. Maximum biomass reduction in barley trials – Cheetah Gold 1 L/ha 


20 

16 

12 

8 

4 

0 

05SA14 

04ND21 

05SA11 

05ND08 

ND32/05 

05WB27 

05ND10 

04WA11 

04ND23 

06WA14 

04SA44 

SA42/05 

05WB28 

05VA14 

05WA12 

06SA55 

05NW14 

06ND18 

06NW17 

04ND01 

05NW15 

04VB11 

04VB12 

05SA12 

05ND09 

05ND11 

05SA15 

05NW17 

05VB07 

04VB09 

06NW13 

06NW15 

06ND17 

06NW11 

06VB06 

04QG08 

04QG10 

05VA15 

05VB06 

05VA17 

05NW15 

ND31/05 

04VB09 

06WA15 

06ND20 

06NW08 

The addition of Uptake 0.5% v/v in preference to Hasten 1% v/v has very little impact on annual ryegrass and wild oat 

control, as shown by the graph below. 

Graph 16. Annual ryegrass and wild oat control with Cheetah Gold 1 L/ha plus Hasten 1% v/v or Uptake 0.5% v/v. 

% control 

100 

95 

90 

85 

80 

Crop yield 



ANNUAL RYEGRASS 



Trial ID annual ryegrass: 05NW16, 05NW17, 05VA16, 05VA17 

100 

Trial ID wild oats: 0 5ND11, 05ND12, 05VA16, 05VA17, 05VB07, 05SA15, 06QC08, 06NW13, 06VB11, 06ND08, 06ND18 

The crop rapidly recovers from effects such as biomass 

reductions and crop discolouration, ensuring that crop 

yield is unaffected. When used at 1 L/ha, Cheetah 

% control 

95 

90 

85 

80 



WILD OATS 



Highest 

result 

Average 

result 

Lowest 

result 

Gold produces a very similar yield to the industry 

standard, Tristar Advance. The graph below shows their 

comparative performances in a weed-free situation. 


Trial ID 

Surfactants/Adjuvants 

Cheetah Gold has been tested with both Hasten 1% v/v 

and Uptake 0.5% v/v in order to determine differences in 

crop safety. The trials below show that Uptake 0.5% v/v 

does provide an improvement in crop selectivity in both 

wheat and barley when compared to Hasten 1% v/v. 

If crop selectivity is a potential concern, Uptake 0.5% 

v/v should be used in preference to Hasten 1% v/v. 

Graph 15. Maximum discolouration and biomass reduction ratings for both Hasten 1% v/v and Uptake 0.5% v/v 

Graph 17. Wheat yields – Cheetah Gold versus Tristar Advance (% of untreated) 

% maximum discolouration 

and biomass reduction 

30 

25 

20 

15 

10 

5 

0 



WHEAT 



% maximum discolouration 

and biomass reduction 

Trial ID wheat: 05ND11, 05ND12, 0SA15, 05NW16, 05NW17, 05VB07, 05WA17, 05VA16, 06ND08, 06ND18, 06ND19, 06ND10, 06NW15 

Trial ID barley: 05VA17, 05ND10, 05NW15, 05SA14, 06WA15, 06NW13, 06ND20, 06QC08 

30 

25 

20 

15 

10 

5 

0 



BARLEY 



Highest 

result 

Average 

result 

Lowest 

result 

Wheat yields as a % of untreated 

110 

100 

90 

80 

70 

60 

50 

40 

30 

05WA12 

05WB05 

05WB07 

05WA16 

06NW14 

06ND09 

06WB08 

05ND08 

05SA11 

05ND10 

05NW15 

05SA14 

05WB27 

05WB28 

05SA42 

05ND31 

05ND32 

06WA14 

Cheetah 

Gold 

1 L/ha 

Tristar 

Advance 

1.5 L/ha 

Cheetah Gold: Adjuvant Hasten 1% v/v or Uptake 0.5% v/v 

Trial ID 

14 15

GENERAL INSTRUCTIONS 

Protection of wildlife, fish, crustaceans and 

environment 

Dangerous to fish and other aquatic organisms. 

DO NOT contaminate streams, rivers or waterways with 

this product or the used container. 

Protection of crops, native and other nontarget 

plants 

DO NOT apply under weather conditions or from 

spraying equipment which would be expected to cause 

spray to drift onto nearby susceptible plants (e.g. cereals 

other than barley or wheat, maize, sweetcorn, sorghum, 

rice or turf grasses), adjacent crops, crop lands or 

pasture. 

DO NOT plant susceptible crops (e.g. maize, sorghum, 

rice) for 10 weeks after application. 

Undersown clovers and medics 

Cheetah Gold does not affect undersown clovers or 

medics or other broadleaf crops. 

Storage and disposal 

Store in the closed, original container in a cool, wellventilated 

area. Do not store for prolonged periods in 

direct sunlight. 

Triple or preferably pressure rinse containers before 

disposal. Add rinsings to spray tank. Do not dispose of 

undiluted chemicals on site. If recycling, replace cap 

and return clean containers to recycler or designated 

collection point. If not recycling, break, crush or 

puncture and bury empty containers in a local authority 

landfill. If no landfill is available, bury the containers 

below 500 mm in a disposal pit specifically marked and 

set up for this purpose clear of waterways, desirable 

vegetation and tree roots. Empty containers and product 

should not be burnt. Do not re-use empty container for 

any other purpose. 

SAFETY DIRECTIONS 

Harmful if absorbed by skin contact, inhaled or 

swallowed. Will irritate the eyes and skin. Repeated 

exposure may cause allergic disorders. Avoid contact 

with eyes and skin. Do not inhale vapour or spray mist. 

When opening the container and preparing spray, 

wear cotton overalls buttoned to the neck and wrist, a 

washable hat, elbow-length PVC gloves, goggles and a 

disposable mist face mask covering mouth and nose. 

When using the prepared spray, wear cotton overalls 

buttoned to the neck and wrist (or equivalent clothing). 

If clothing becomes contaminated with product or wet 

with spray, remove clothing immediately. If product or 

spray on skin, immediately wash area with soap and 

water. If product or spray in eyes, wash it out immediately 

with water. Wash hands after use. After each day's use, 

wash gloves, goggles and contaminated clothing. 

First Aid 

If poisoning occurs, contact a doctor or Poisons 

Information Centre (telephone 13 11 26). If swallowed, 

do NOT induce vomiting. Give a glass of water. 

Material safety data sheet 

Additional information is listed in the Material 

Safety Data Sheet, which can be obtained from 

www.bayercropscience.com.au 

For post-emergent control of 

annual ryegrass, wild oats and 

for the suppression of annual 

phalaris in wheat and barley 

technical guide 

Bayer CropScience Pty Ltd, 

ABN. 87 000 226 022 

391–393 Tooronga Road 

Hawthorn East, Vic 3123 

Ph: (03) 9248 6888 

Fax: (03) 9248 6800 

www.bayercropscience.com.au 

Technical enquiries: 1800 804 479 

Disclaimer 

Always read the label for full instructions. 

The information and recommendations set out in this brochure are based on tests 

and data believed to be reliable at the time of publication. Results may vary, as 

the use and application of the products is beyond our control and may be subject 

to climatic, geographical or biological variables, and/or developed resistance. 

Any product referred to in this brochure must be used strictly as directed, and 

in accordance with all instructions appearing on the label for that product and in 

other applicable reference material. So far as it is lawfully able to do so, Bayer 

CropScience Pty Ltd accepts no liability or responsibility for loss or damage 

arising from failure to follow such directions and instructions. 

Cheetah ® , 1-OnePass ® , Hussar ® , Jaguar ® , Eclipse ® , Buctril ® , Wildcat ® , 

Tigrex ® , Giant ® , Barracuda ® and Tristar ® are Registered Trademarks of Bayer. 

Le-mat ® is a Registered Trademark of Arysta. 

BCB 021

TOxICOLOGICAL PROPeRTIeS - Bayer CropScience

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