New Zealand - English - Ministry for Primary Industries
Keep out of reach of children
A selective post-emergent herbicide for grass weed control in broadleaf crops and forestry.
ACTIVE INGREDIENT: Contains 360g/L clethodim in the form of an emulsifiable concentrate
Also contains 582 g/L dearomatised hydrocarbon solvent and 17.5 g/L calcium dodecylbenzene sulphonate.
Relyon NZ Limited
C/o KPMG, The Terrace
Level 5, 79 Cashel Street
Farmlands Co-operative Society Limited
535 Wairakei Road, Burnside
Tel 0800 200 600
Net Contents: 1, 5, 20, 200 L
3.1D, 6.1E, 6.3A, 6.4A, 6.9B, 9.1C, 9.2A, 9.3C
QUALIFIED HANDLER This product must be under the control of a qualified handler during use.
Clethora must not be applied into or onto water.
Clethora must be applied via ground-based method only.
Record Keeping: Records of use as described in NZS 8409 Management of Agrichemicals must be
kept if using 3 litres or more of Clethora within 24 hours.
Combustible liquid; keep away from naked flame. No smoking.
May be harmful if swallowed and if aspirated into lungs. May cause skin and eye irritation. May cause
liver damage from repeated oral exposure at high doses.
Harmful to aquatic plants. Avoid contamination of any water supply with product or empty container.
Very toxic to some plant species. Do not allow drift to occur outside the target area.
Harmful to terrestrial vertebrates.
Keep out of reach of children. Do not store near heat or flame. Store in original container tightly closed
and in a locked, dry, cool area away from sources of ignition and foodstuffs. Store in accordance with
NZS 8409 Management of Agrichemicals. Stores containing 100 litres are subject to signage, 1000 litres
of Clethora require secondary containment and more than 1000 litres require emergency response
plans. Stores containing 500 litres of GRASIDIM must have at least 2 fire extinguishers.
Avoid skin and eye contact and inhalation of spray mist. When mixing or applying wear eye protection,
chemically resistant gloves and boots, and overalls. Remove protective clothing and wash hands and
face thoroughly before meals and after work.
Triple rinse empty container and add rinsate to the spray tank. If recycling, discard cap and deliver clean
container to an Agrecovery depot. Otherwise crush and bury in a suitable landfill. Dispose of product
only by using according to the label, or at an approved landfill. Do not burn.
If swallowed do not induce vomiting. If splashed in eyes, wash out immediately with running water for
several minutes. If skin or hair contact occurs, remove contaminated clothing and wash with soap and
running water. If inhaled, immediately move to fresh air and rest. Maintain half upright position if breathing
is difficult. Call the National Poisons Centre 0800 POISON (0800 764 766) (24hrs) or a doctor
immediately for advice.
In a transport emergency call 111, Police or Fire Brigade. For specialist advice in an emergency only, call
0800 CHEMCALL (0800 243 6225) (24hrs).
Extinguish all ignition sources, exclude all bystanders from the vicinity of the spill and prevent material
from entering waterways. Wear appropriate protective clothing. Absorb spills with inert material and place
in waste containers. Wash area with water and absorb with further inert material. Dispose of waste safely
in an approved landfill.
Do not carry more than 1 litre of Clethora on a passenger service vehicle.
Half fill the spray tank and with the agitator operating and add the correct volume of Clethora. Add the
remainder of the water then add the adjuvant and agitate thoroughly before using. After standing, agitate
spray solution well before reusing.
Clethora is compatible with terbuthylazine and clopyralid. Do not apply in combination with other herbicides
unless experience shows that efficacy is not affected. Do not apply within 7 days of phenoxy herbicides.
Apply using well maintained spray equipment that is accurately calibrated to apply 100-400 litres of water
per hectare. Use nozzles and pressures that produce a droplet size of 150–300 microns VMD. Use the
high water rate for dense grass infestations. Clean equipment thoroughly after use.
Clethora contains a herbicide from the cyclohexanedione group and has the inhibition of acetyl coA
carboxylase mode of action. Some naturally-occurring weed biotypes resistant to Clethora 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 Clethora or other Group A Herbicides.
DIRECTIONS FOR USE
For best results apply to young actively growing grass weeds. Do not apply to plants under stress from
drought or waterlogging. Use the lower rate on seedling grass weeds (2–5 leaf) or actively regenerating
rhizomes, and the higher rate on tillering plants or hardy rhizomatous grasses. On established sod-bound
rhizomatous grasses and established turf ryegrass in non-cultivated crops, suppression only may be
obtained. On crops which have been grazed, remove stock and allow grasses to freshen up for a few days
(5–10cm new growth) before treating. To minimise any possible crop damage, avoid spray overlaps.
Clethora is considered to be rainfast if applied at least one hour before rainfall.
Always add an emulsifiable crop mineral oil at 2.0 litres/ha with all applications.
White clover seed
Apply after closing up, to control annual and perennial ryegrass and other
(e.g. lucerne, lupins,
To control annual and perennial ryegrass and other grass weeds.
Apply when grass seedlings are small (typically 3–6 weeks after planting)
and well before canopy closure.
(e.g. plantain, chicory)
To control annual and perennial ryegrass and other grass weeds. Do not
apply Clethora to plantain seed crops after flower heads are first visible in
the base of the plants.
To control actively growing grass weeds. Apply as a directed spray to the
base of the trees to avoid fruit contact.
To control actively growing grass weeds. Do not apply more than 670 ml/ha.
Crop safety has been demonstrated on onions, carrots and lettuce. Where
crop safety is unknown, a small area should be treated before widespread
application. NB: Asparagus
do not apply during the cutting period.
Peas, lentils, oilseed rape
To control wild oats. Apply 170 ml/ha when the majority of oats are in the
2–5 leaf growth stage. A temporary effect on leaf colour and sheen may
occur in peas. This does not affect crop vigour or yield.
Macrocarpa, Douglas fir)
Do not exceed 670 ml/ha.
Tree release – Spot treatment: Use 23 ml Clethora plus 100ml emulsifiable
crop oil per ten litres of water. Apply 20 ml spray solution per square metre.
To control broadleaf weeds and for residual control, apply in combination
with terbuthylazine at recommended label rates.
GRASSES CONTROLLED AND RECOMMENDED USE RATES
summergrass, floating sweet grass, canary grass, bristle grass, volunteer cereals
Note: Turf ryegrasses and tillered cereals will only be suppressed at these rates.
170 - 330 ml
Annual poa, smooth witchgrass, soft brome, phalaris, tall fescue, prairie grass,
ripgut brome, browntop, barley grass.
Note: Chewings fescue, Yorkshire fog and hairgrass will be suppressed but not
controlled at these rates.
330 - 670 ml
Couch, paspalum, Indian doab
1.3 – 2.0 litres
It is an offence for users of this product to cause residues exceeding the relevant MRL in the Food
Notice: Maximum Residues Limits of Agricultural Compounds.
Vegetable crops - 5 weeks.
Legume crops, forage herbs and fodder brassica crops - 3 weeks.
This formulation is warranted to contain the specified active ingredient within accepted analytical tolerance
when packed. The user bears the risk for damage resulting from factors beyond the Manufacturer’s control.
The manufacturer declines all liability for damage resulting from improper storage or use of the product.
Registered pursuant to the ACVM Act 1997, P9714
for registration conditions.
Approved under the HSNO Act 1996, HSR100921
See www.epa.govt.nz for Controls.
Ref No P9714-01
Public Record of Delegate Decision
For granting an application for registration under section 21 of the Agricultural Compounds and Veterinary
Medicines Act 1997
Relyon NZ Limited
Date of Delegate
29 July 2019
This registration will expire 5 years from the date of this Delegate’s Decision.
Application eligible with no CI to protect
Summary of reasons for the Decision to grant the Application
Except for the trade name and registrant details, this product is identical in all respects to an already registered
Recommendation to Register
On the basis of the above information, the product as approved, and when imported, manufactured, sold or used
in accordance with the conditions listed below, is not likely to cause unacceptable risks to:
trade in primary produce
animal welfare or
In balance, there are sufficient benefits to warrant this product to be registered.
When used in accordance with this approval, the product is not likely to cause residues in primary produce, food
or food-related products that would breach domestic food residue standards.
The assessed label content is adequate to provide sufficient consumer information to allow the product to be used
appropriately and safely and meets labelling requirements.
Being satisfied of the matters above, and under delegated authority pursuant to the Agricultural Compounds and
Veterinary Medicines Act 1997, this application for registration is granted, under section 21(1)(d) under the
conditions as listed on the Register.