Hussar ODPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

For the post-emergent control of annual ryegrass, wild oats and annual phalaris in wheat and barley* and certain broadleaf weeds in wheat as specified in the DIRECTIONS FOR USE table (*refer to Critical Comments)

GENERAL INSTRUCTIONS
Hussar OD is a selective sulfonylurea herbicide. It is predominantly a foliar herbicide with less activity via the soil. Hussar OD will not reliably control weeds that emerge after spraying. Results are best under good growing conditions and application to weeds or crop under stress should be avoided.

Use of Surfactant / Wetting Agent
Wheat
It is recommended that Hussar OD be applied with the addition of BS1000 bio-degradable surfactant at 0.25% v/v, even when tank mixing with other products. The suitability of other non-ionic wetting agents or oil based adjuvants should be confirmed with Bayer CropScience prior to mixing with Hussar OD.
Barley
Damage to barley (including reduced growth and yield reductions) from Hussar OD is reduced if no additional adjuvant is added to the spray solution. Weed control however may be reduced if no additional adjuvant is used.
In situations where optimum weed control is required it is recommended that Hussar OD be applied with the addition of BS1000 bio-degradable surfactant at 0.25% v/v.
Where improved crop tolerance is required and some reduced reliability on control of weeds is accepted then do not add any additional adjuvant when applying Hussar OD.
The suitability of other non-ionic wetting agents or oil based adjuvants should be confirmed with Bayer CropScience prior to mixing with Hussar OD.

Crop Safety
General
Do not apply Hussar OD if a previous application of a Group B herbicide has been made to the current crop.
- Some crop yellowing and growth retardation may occur within 5 weeks after application. Growth retardation will be increased if the crop is affected by root disease, (e.g. cereal cyst nematode, rhizoctonia, take-all (haydie)), nutritional stress, waterlogging, drought stress, excessively cold conditions or previous herbicide treatment.
- Application to very dry sandy soils followed by soaking rainfall may cause significant crop effects.
- Crop damage will be increased in highly alkaline soils (soil pH > 8.5 as determined by soil in water suspension).
- Do not apply to crops not actively growing due to cold and wet conditions or drought stress.
- Do not overlap when spraying or double spray corners.
Wheat
- Wheat should be between the 3 leaf stage (Z13 growth stage), and the 5 tiller stage (Z25 growth stage) before application of Hussar OD.
Barley
Crop damage, ranging from transient to severe, should always be expected when applying Hussar OD to barley.
DO NOT apply Hussar OD to barley unless no other weed control option is viable.
Crop damage in barley will generally be reduced if:
- Crop is past the early tillering stage at spraying (Z21 or greater)
- Warmer conditions prevail at the time of spraying
- Good growing conditions follow application, including adequate nutrition, control of foliar disease, minimal frosts and a cool finish to the growing season with adequate soil moisture.
- A wetting agent is not added to the spray solution (see Surfactant/Wetting Agent section for advice on use of wetters).
DO NOT apply Hussar OD to late sown barley crops, i.e. barley sown after the end of June.
Note: Crop effects in barley, including reduced growth can persist for the length of the season. In the absence of weed competition significant yield reductions (generally no greater than 30%) have been measured. The extent of damage from Hussar OD may vary between different varieties.

Resistant Weeds Warning
Hussar OD Selective Herbicide is a member of the sulfonylurea group of herbicides and has the inhibitor of acetolactate synthase (ALS) mode of action. For weed resistance management Hussar OD is a Group B herbicide. Some naturallyoccurring weed biotypes resistant to Hussar OD, and other Group B herbicides, may exist through normal genetic variability in any weed population.
These resistant individuals can eventually dominate the weed population if these herbicides are used repeatedly. These resistant weeds will not be controlled by Hussar OD or other Group B herbicides.
Do not rely exclusively on Hussar OD for weed control. Use as part of an integrated weed management program involving herbicides with other modes of action and non-chemical methods of control. CropLife Australia resistance management strategies are available from your local agricultural chemical supplier. Refer to these strategies for details of how to manage the build up of resistant weeds on your farm.
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 Hussar OD to control resistant weeds.

Mixing
Half fill the spray tank with water, then with agitators in motion, add the correct amount of Hussar OD directly into the spray tank. Add other relevant compatible herbicides, then wetting agent or crop oil as recommended. Complete filling the tank with agitators in motion. Agitation must continue before and during spraying.

Application
Ensure that complete and even spray coverage of all weeds is achieved.

Equipment
Ground Sprayers – Standard boom sprayers only are recommended and must be fitted with by-pass or mechanical agitation. It is recommended that a minimum of 50 to 80 L water/ha is used.
Please refer to specific Restraints relating to downwind no-spray zones. USE ONLY a medium spray droplet classification according to ASAE S572 definition for standard nozzles. Refer to the nozzle manufacturer's specification for information on the spray droplet classification associated with your spray nozzles.
Aircraft – Do not apply Hussar OD by aircraft.

Compatibility
Wheat
Compatible products: Lontrel, Starane.
Non-compatible products* (*do not use in mixture with Hussar OD as decreased efficacy on weeds and/or adverse crop injury may occur): Mixing with zinc-based foliar fertilisers may result in loss of efficacy. Bromoxynil MCPA (e.g. Bromicide MA, Buctril MA), Tigrex, Giant, Igran, other sulfonylurea herbicides, chlorpyrifos-based formulations.
Contact Bayer CropScience for advice on use with Hussar OD: Insecticidal products other than chlorpyrifos, LVE MCPA.
Barley
Do not mix Hussar OD with any other product, with the exception of BS1000, when applying to barley.

DIRECTIONS FOR USE
Restraints
DO NOT use if rainfall or irrigation is to occur within 8 hours of application.
DO NOT apply to crops undersown with legumes.
DO NOT apply to wheat before the 3-leaf stage (Z13), or to barley before the 4-leaf stage (Z13, 21).
DO NOT apply to wheat or barley that is physically damaged (e.g. by hail, wind, insect attack).
DO NOT apply to wheat without surfactant/wetting agent. See 'Use of Surfactant/Wetting Agent' under 'General Instructions’.
DO NOT apply to paddocks where there is a high risk of weeds resistant to Group B herbicides.
DO NOT make more than one application of a Group B herbicide per season.
Spray Drift Restraints
DO NOT apply when wind speed is less than 3 or more than 20 kilometres per hour at the application site.
DO NOT apply during surface temperature inversion conditions at the application site.
Mandatory No-spray Zones
DO NOT apply when there are non-target plants or aquatic or wetland areas including aquacultural ponds or surface streams and rivers within 15 metres downwind from the application area.
Note
Hussar OD is a sulfonylurea herbicide. Hussar OD will substantially reduce the growth of many weeds rather than give complete plant kill. Refer to the Critical Comments in the Directions for Use Table below, for directions on specific weeds.

WHEAT
(≥ 3 leaf (Z13) and ≤ 5 tillers (Z25))
Weed: Annual ryegrass (Lolium rigidum)
State: NSW, ACT, Vic, SA, WA only
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: Apply generally within 4 to 7 weeks after sowing, but only to wheat with at least 3 leaves (Z13) and not more than 5 tillers (Z25). Do not use for control of dense ryegrass populations (>300 plants/m2). Do not use on weeds resistant to Group B herbicides.

Weed: Annual ryegrass (Lolium rigidum)
State: NSW, ACT, Vic, SA, WA only
Weed stage: Early tillering (Z13, 21 to Z13, 22)
Rate ml / ha: 100
Critical comments: Apply generally within 4 to 7 weeks after sowing, but only to wheat with at least 3 leaves (Z13) and not more than 5 tillers (Z25). Do not use for control of dense ryegrass populations (>300 plants/m2). Do not use on weeds resistant to Group B herbicides.

Weed: Wild oats (Avena spp.)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 100
Critical comments: Apply generally within 4 to 7 weeks after sowing, but only to wheat with at least 3 leaves (Z13) and not more than 5 tillers (Z25). Do not use for control of dense wild oat populations (>150 plants/m2).

Weed: Wild oats (Avena spp.)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: Suppression of wild oats. Will substantially reduce the growth of wild oats and their ability to compete with the crop and will reduce seed set of wild oats but may not give a significant reduction in plant numbers.
Critical comments above for wild oat control (100 mL/ha rate) also apply.

Weed: Annual phalaris, paradoxa grass (Phalaris paradoxa only)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 100
Critical comments: Apply generally within 4 to 7 weeks after sowing, but only to wheat with at least 3 leaves (Z13) and not more than 5 tillers (Z25). Do not use for control of dense phalaris populations (>300 plants/m2). Other phalaris species may not be adequately controlled with Hussar.

Weed: Annual phalaris, paradoxa grass (Phalaris paradoxa only)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: Suppression of phalaris. Will substantially reduce the growth of phalaris and its ability to compete with the crop and will reduce seed set of phalaris but may not give a significant reduction in plant numbers. Critical comments above for phalaris control (100 mL/ha rate) also apply.

Weed: Charlock (Sinapis arvensis)
State: All States
Weed stage: cotyledon to 8 leaf
Rate ml / ha: 75
Critical comments: Will not control weeds resistant to Group B herbicides.

Weed: Clover (Trifolium spp.)
State: All States
Weed stage: cotyledon to 6 leaf
Rate ml / ha: 75  
Critical comments: -

WHEAT
(≥ 3 leaf (Z13) and ≤ 5 tillers (Z25))
Weed: Deadnettle (Lamium amplexicaule)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75  
Critical comments: -

Weed: Doublegee, spiny emex, three corner jack (Emex australis)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 100
Critical comments: -

Weed: Fumitory, denseflower (Fumaria densiflora), Fumitory, wall (Fumaria muralis)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75
Critical comments: Not all fumitory species are adequately controlled with Hussar. Ensure species identification is correct before applying Hussar.

Weed: Indian hedge mustard (Sisymbrium orientale)
State: All States
Weed stage: 2 to 6 leaf
Rate ml / ha: 75
Critical comments: Will not control weeds resistant to Group B herbicides.

Weed: Lupins (volunteer) (Lupinus angustifolius)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75
Critical comments: Lupins that emerge after application will not be controlled.

Weed: Medic (Medicago spp.)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75
Critical comments: -

Weed: Paterson’s curse, Riverina bluebell, Salvation Jane (Echium plantagineum)
State: All States
Weed stage: 2 to 6 leaf
Rate ml / ha: 100
Critical comments: -

Weed: Shepherd’s purse (Capsella bursa-pastoris)
State: All States
Weed stage: 2 to 8 leaf
Rate ml / ha: 75
Critical comments: -

Weed: Turnip weed (Rapistrum rugosum)
State: All States
Weed stage: cotyledon to 6 leaf
Rate ml / ha: 75
Critical comments: Will not control weeds resistant to Group B herbicides.

Weed: Wild radish (Raphanus raphanistrum)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 100
Critical comments: Heavy populations (>50 plants/m2) or those suffering moisture stress may not be adequately controlled.
A follow-up application of a suitable herbicide may be required to control remaining plants or plants that emerge after application. Will not control weeds resistant to Group B herbicides.

Weed: Wire weed, hogweed (Polygonum aviculare), tree hogweed (Polygonum patulum)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75
Critical comments: -

Weed: Bedstraw (Galium tricornutum)
State: All States
Weed stage: cotyledon to 4 whorls
Rate ml / ha: 100
Critical comments: Suppression only.

Weed: Black bindweed (Fallopia convolvulus)
State: All States
Weed stage: 2 to 6 leaf
Rate ml / ha: 75
Critical comments: Suppression only. Will not control weeds resistant to Group B herbicides.

Weed: Peas (volunteer) (Pisum sativum)
State: All States
Weed stage: 3 to 4 node
Rate ml / ha: 75
Critical comments: Suppression only. Peas that emerge after application will not be controlled.

Weed: Sheepweed, white ironweed, corn gromwell (Buglossoides arvense)
State: All States
Weed stage: cotyledon to 4 leaf
Rate ml / ha: 75
Critical comments: Suppression only.

Weed: Sowthistle (Sonchus oleraceus)
State: All States
Weed stage: 2 to 4 leaf
Rate ml / ha: 100
Critical comments: Suppression only. Remaining plants will be stunted and chlorotic after treatment. Will not control weeds resistant to Group B herbicides.

Weed: Stonecrop (Crassula sieberana), Tares, wild vetch (Vicia sativa)
State: All States
Weed stage: 2 to 4 leaf
Rate ml / ha: 75
Critical comments: Suppression only.

Weed: Toadrush (Juncus bufonius)
State: All States
Weed stage: up to 2 leaf
Rate ml / ha: 75
Critical comments: Suppression only.

BARLEY
(≥ 4 leaf (Z13,21) and ≤ 5 tillers (Z25)) (*refer to Critical Comments)
Weed: Annual ryegrass (Lolium rigidum)
State: NSW, ACT, Vic, SA, WA only
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: General note for tolerance in barley: Barley has limited tolerance to Hussar OD and may be substantially damaged.
DO NOT use Hussar OD on barley prior to reading the Crop Safety section of the label.
Apply generally within 5 to 7 weeks after sowing, but only to barley with at least 4 leaves (Z13,21) and not more than 5 tillers (Z25). Do not use for control of dense ryegrass populations (>300 plants/m2). Do not use on weeds resistant to Group B herbicides.

Weed: Annual ryegrass (Lolium rigidum)
State: NSW, ACT, Vic, SA, WA only
Weed stage: Early tillering (Z13, 21 to Z13, 22)
Rate ml / ha: 100
Critical comments: General note for tolerance in barley: Barley has limited tolerance to Hussar OD and may be substantially damaged.
DO NOT use Hussar OD on barley prior to reading the Crop Safety section of the label.
Apply generally within 5 to 7 weeks after sowing, but only to barley with at least 4 leaves (Z13,21) and not more than 5 tillers (Z25). Do not use for control of dense ryegrass populations (>300 plants/m2). Do not use on weeds resistant to Group B herbicides.

Weed: Wild oats (Avena spp.)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 100
Critical comments: See “General note for tolerance in barley” above and Crop Safety section of this label.
Apply generally within 5 to 7 weeks after sowing, but only to barley with at least 4 leaves (Z13,21) and not more than 5 tillers (Z25). Do not use for control of dense wild oat populations (>150 plants/m2).

Weed: Wild oats (Avena spp.)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: Suppression of wild oats. See “General note for tolerance in barley” above and Crop Safety section of this label. Will substantially reduce the growth of wild oats and their ability to compete with the crop and will reduce seed set of wild oats but may not give a significant reduction in plant numbers. Critical comments above for wild oat control (100 mL/ha rate) also apply.

Weed: Annual phalaris, paradoxa grass (Phalaris paradoxa only)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 100
Critical comments: See “General note for tolerance in barley” above and Crop Safety section of this label.
Apply generally within 5 to 7 weeks after sowing, but only to barley with at least 4 leaves (Z13,21) and not more than 5 tillers (Z25). Do not use for control of dense phalaris populations (>300 plants/m2). Other phalaris species may not be adequately controlled with Hussar.

Weed: Annual phalaris, paradoxa grass (Phalaris paradoxa only)
State: All States
Weed stage: 1 to 3 leaf (Z11 to Z13)
Rate ml / ha: 75
Critical comments: Suppression of phalaris. See “General note for tolerance in barley” above and Crop Safety section of this label. Will substantially reduce the growth of phalaris and its ability to compete with the crop and will reduce seed set of phalaris but may not give a significant reduction in plant numbers.
Critical comments above for phalaris control (100 mL/ha rate) also apply.

WITHHOLDING PERIODS
Harvest NOT REQUIRED WHEN USED AS DIRECTED
Grazing/Stockfood DO NOT GRAZE OR CUT FOR STOCKFOOD FOR 4 WEEKS AFTER APPLICATION