Sharpen WG

Manufacturer
BASF
Category
Herbicides
Registered until
2024-06-30
Registration number
62853
Active materials
Links

For the control of a range of broadleaf weeds prior to establishment of crops and forestry plantations, fallows, established citrus, pome and almond orchards, and around commercial, industrial, and agricultural buildings and yards; as per the DIRECTIONS FOR USE table.

DIRECTIONS FOR USE:
RESTRAINT
DO NOT apply by aerial application.

SPRAY DRIFT RESTRAINTS
DO NOT apply with spray droplets smaller than a COARSE spray droplet size category according to “APVMA Compliance Instructions for Mandatory COARSE or Larger Droplet Size Categories” located under this title in the GENERAL INSTRUCTIONS section of this label.
DO NOT apply when wind speed is less than 3 or more than 20 kilometres per hour as measured at the application site. DO NOT apply during surface temperature inversion conditions at the application site
Users of this product MUST make an accurate written record of the details of each spray application within 24 hours following application and KEEP this record for a minimum of 2 years. The spray application details that must be recorded are: 1) date with start and finish times of application; 2) location address and paddock/s sprayed; 3) full name of this product; 4) amount of product used per hectare and number of hectares applied to; 5) crop/situation and weed/pest; 6) wind speed and direction during application; 7) air temperature and relative humidity during application; 8) nozzle brand, type, spray angle nozzle capacity and spray system pressure measured during application; 9) name and address of person applying this product. (Additional record details may be required by the state or territory by the state or territory where this product is used.)

MANDATORY NO-SPRAY ZONES WHEN NOT USED IN TANK MIX
DO NOT apply if there is non-target vegetation downwind from the application area and within the mandatory no-spray zone shown in the table below. 
Coarse Spray Quality (ASAE S572 definition for standard nozzles)
Wind Speed Range at Time of Application: 3 to 20 kilometres per hour
Downwind No-Spray Zone: 120m

MANDATORY NO-SPRAY ZONES WHEN USED IN TANK MIX WITH PARAQUAT
DO NOT apply if there is non-target vegetation downwind from the application area and within the mandatory no-spray zone shown in the table below.
Coarse Spray Quality (ASAE S572 definition for standard nozzles)
Wind Speed Range at Time of Application: 3 to 20 kilometres per hour
Downwind No-Spray Zone: 120m

MANDATORY NO-SPRAY ZONES WHEN USED IN TANK MIX WITH GLYPHOSATE
DO NOT apply if there is non-target vegetation downwind from the application area and within the mandatory no-spray zone shown in the table below.
Coarse Spray Quality (ASAE S572 definition for standard nozzles)
Wind Speed Range at Time of Application: 3 to 20 kilometres per hour
Downwind No-Spray Zone: 250m

SITUATION
Prior to sowing the following broadacre crops
Cereals
- Barley
- Oats
- Wheat Cotton Pulses
- Chickpeas
- Faba beans
- Field peas
- Lentils
- Lupins
- Cowpeas Legumes
- Sub clover Sorghum Soybeans

Prior to starting a fallow, fallow maintenance and prior to establishment of Forestry Plantations

To assist in weed control in Commercial, Industrial and Public Service areas, around Agricultural buildings, yards

Established Citrus, Pome and Almond orchards

Weeds Controlled: Amaranth (Amaranthus spp.) Bindweed/climbing buckwheat (Fallopia convolvulus) Blackberry nightshade (Solonum nigrum) Bladder ketmia (Hibiscus trionum) Caltrop (Tribulus terrestris) Capeweed (Arctotheca calendula) Common Catsear (Hypochaeris radicata) Crassula/stonecrop (Crassula colorata) Fat Hen (Chenopodium album) Heliotrop (Heliotropium europaeum) Marshmallow/Small flowered mallow max 6 leaf (Malva parviflora) Medics (Medicago spp.) Muskweed (Myagrum perfoliatum) Patersons curse (Echium plantagineum) Prickly lettuce (Lactuca serriola) Scarlet Pimpernel (Anagallis arvensis) Sowthistle (Sonchus oleraceus) Spiny emex (Emex australis) Volunteer canola (Brassica napus) max 4 leaf including Roundup Ready varieties Volunteer cotton seedlings (Gossypium spp.) including Roundup Ready Flex varieties 
Volunteer pulse crops including lupin (Lupinus angustifolius) and chickpea (Cicer arietinum) Wild turnip/turnip weed (Rapistrum rugosum)
Rate: 17-26 g/ha plus 1% Hasten or high quality MSO

Weeds Controlled: Fleabane (Conyza spp.) 1-6 leaf
Note: For suppression of fleabane in the rosette stage (6-30 leaf) before bolting use the 26-34g rate
Rate: 17-34 g/ha plus 1% Hasten or high quality MSO

Weeds Controlled: Shepherd’s purse (Capsella bursa pastoris) 1-6 Leaf Storksbill (Erodium spp.) Wild radish (Raphanus raphanistrum) Wireweed (Polygonium aviculare)
Rate: 26-34 g/ha Plus 1% Hasten or high quality MSO 

Critical Comments: DO NOT apply post-sowing pre-emergent
ALWAYS apply SHARPEN WG Herbicide with 1% v/v Hasten Spray adjuvant or high quality methylated seed oil (MSO).
Use the lower rates on younger and smaller (up to six leaf) plants or plants growing under good conditions and the higher rates on older plants (up to 10 leaves) or plants growing under less optimum conditions. For marshmallow, Bladder ketmia, volunteer canola and volunteer cotton use lower rates for plants up to 4 leaf and higher rates when targeting weeds up to maximum of 6 leaves.
The following rates of SHARPEN WG Herbicide are recommended for volunteer cotton control: 17g/ha from cotyledon up to 4 leaf, 26g/ha from cotyledon up to 6 leaf.
For control of Fleabane use lower rates for plants up to 4 leaf and higher rates when targeting weeds up to maximum of 6 leaves. For plants greater than six leaf to bolting stage efficacy of SHARPEN WG Herbicide may be reduced and regrowth may occur.
Fleabane can germinate in Autumn and Spring and it is important to establish size and age (check tap root as an indication) to ensure control. Fleabane that appears small may in fact be older and have an established tap root and may not be completely controlled.
To ensure uptake of SHARPEN WG Herbicide, DO NOT sow crops for at least 1 hour after application. Crop tolerance to SHARPEN WG Herbicide by the IBS sowing method is very good and is maximised if the seeder is fitted with knifepoints and press wheels to remove treated soil from above the seed.
Sow crops with a seeder that will move treated soil away from crop row. This is particularly important with lentils and faba beans, cotton, cowpeas, sorghum and soybeans. Use of seeders, or planting under conditions that do not move treated soil from the crop row may increase the level of early crop damage. Minor transient reduction in plant height may be observed in cotton where moist conditions prevail after germination but the crop will soon recover and will not affect yield. Also be careful when applying SHARPEN to fields just prior to sowing that will be soon after irrigated as soil water may move herbicide into crop row resulting in injury.
Refer to the plant-back interval table on this label and also refer to the appropriate companion product label, in case a longer re-crop sowing period is required.
For use in established citrus, pome and almond orchards, apply as a directed or shielded spray or using wiper equipment. DO NOT allow wiper surface to contact any part of the tree or plant. DO NOT allow spray or spray drift to contact green bark or stems, canes, laterals, suckers, fresh wounds, foliage or fruit. DO NOT apply as spray near trees less than 3 years old unless they are effectively shielded from spray and spray drift.

SITUATION
Prior to sowing the following broadacre crops
Cereals
- Barley
- Oats
- Wheat Corn Cotton Pulses
- Chickpeas
- Faba Beans
- Field Peas
- Lentils
- Cowpeas Legumes
- Sub Clover Sorghum Soybeans

Prior to starting a fallow, fallow maintenance and prior to establishment of forestry plantations

To assist in weed control in Commercial, Industrial and Public Service areas, around Agricultural buildings, yards

Established citrus, pome and almond orchards

Weeds Controlled: For the control of broadleaf and grass weeds listed: Amaranth (Amaranthus spp.) Amsinckia (Amsinckia spp.) Annual ryegrass (Lolium spp.) Barley grass (Hordium spp.) Bindweed/climbing buckwheat (Fallopia convolvulus) Blackberry nightshade (Solonum nigrum) Bladder ketmia (Hibiscus trionum) Brome grass (Bromus spp.) Caltrop (Tribulus terrestris) Capeweed (Arctotheca calendula) Charlock (Sinapis arvensis) Cowvine/peachvine (Ipomoea lonchophylla) Fat hen (Chenopodium album) Fleabane (Conyza spp.) Heliotrop (Heliotropium europaeum) Indian hedge mustard (Sisymbrium orientale) Kochia (Kochia scoparia) Marshmallow/Small flowered mallow max 6 leaf (Malva parviflora) Medics (Medicago spp.) Muskweed (Myagrum Perfoliatum) Patersons curse (Echium plantagineum) Penny cress (Thlaspi arvense) Prickly lettuce (Lactuca serriola) Shepherd’s purse1-6 leaf (Capsella bursa pastoris) Silver grass (Vulpia spp.) Snoutbean (Rhynchosia minima) Sowthistle (Sonchus oleraceus) Spiny emex (Emex australis) Storksbill (Erodium spp.) Turnip weed/wild turnip (Rapistrum rugosum) Volunteer canola (Brassica napus) max 4 leaf including Roundup Ready varieties
Volunteer Cotton seedlings (Gossypium spp.) including Roundup Ready Flex varieties 
Volunteer pulse crops including lupin (Lupinus angustifolius) and chickpea (Cicer arietinum)
Volunteer/wild oat (Avena spp.) Wild radish (Raphanus raphanistrum) Wireweed (Polygonium aviculare)
Rate: 17-34 g/ha plus recommended label rate of glyphosate herbicide plus 1% Hasten or high quality MSO
Critical Comments: Refer to Critical Comments above and in addition: Weed growth stage should be 2 to 10 leaf.
Reduction of glyphosate activity on summer grasses may occur from the tank mix, which may result in reduced control of certain grass weeds. If grass weeds are present and their control is important, it is recommended that the highest labeled rate of glyphosate be used for the use situation encountered.
If grass weeds recover, a follow up application of a knockdown herbicide with another mode of action may be required. Refer also to the product label for the knockdown herbicide used.
Use the lower rates on younger plants or plants growing under good conditions and the higher rates on older plants or plants growing under less optimum conditions.
Refer to the plant-back interval table on this label and also refer to the appropriate companion product label, in case a longer re-crop sowing period is required. 

SITUATION
Prior to sowing crops and for fallow maintenance

Weeds Controlled: For the control of broadleaf and grass weeds listed: Annual ryegrass (Lolium spp.) Brome grass (Bromus spp.) Capeweed (Arctotheca calendula) Chickweed (Stellaria spp.) Patersons curse (Echium plantagineum) Scarlet Pimpernel (Anagallis arvensis) Silver grass (Vulpia spp.) Spiny emex (Emex australis) Storksbill (Erodium spp.) Turnip weed/wild turnip (Rapistrum rugosum)
Rate: 17-26g/ha plus recommended lable rate of paraquat herbicide plus 1 % Hasten or high quality MSO
Critical Comments: Refer to Critical Comments above and in addition:
Use of SHARPEN WG Herbicide with paraquat herbicide may increase the speed at which broadleaf and grass weeds develop visible symptoms and improve control of a range of grass and broadleaf weeds (compared to results achieved with paraquat applied alone).
Apply only as a tank mix with recommended rates of herbicide containing paraquat. Ensure to observe and understand all restraints, rates, safety directions, first aid instructions and general instructions on the paraquat product label.
Hasten at 1% v/v must be added when applying SHARPEN WG Herbicide with paraquat herbicides.

NOT TO BE USED FOR ANY PURPOSE, OR IN ANY MANNER, CONTRARY TO THIS LABEL UNLESS AUTHORISED UNDER APPROPRIATE LEGISLATION.

WITHHOLDING PERIOD:
HARVEST: NOT REQUIRED FOR SHARPEN WG HERBICIDE WHEN USED AS DIRECTED HOWEVER, REFER ALSO TO THE WITHHOLDING PERIOD OF PRODUCT/S MIXED WITH SHARPEN WG HERBICIDE.
GRAZING: DO NOT GRAZE OR CUT FOR STOCKFOOD FOR 5 WEEKS AFTER APPLICATION. DO NOT ALLOW LIVESTOCK TO GRAZE TREATED WEEDS.

GENERAL INSTRUCTIONS
SHARPEN WG Herbicide is a post-emergence herbicide to be added to Roundup Attack Herbicide to improve the control of certain broadleaf weeds including fleabane prior to the establishment of fallows, prior to establishing winter and summer broadacre crops, in commercial, industrial and public service areas, around agricultural buildings, yards and other farm situations. SHARPEN WG Herbicide may be used alone with a suitable adjuvant for control of volunteer cotton seedlings including Roundup Ready Flex cotton. SHARPEN WG Herbicide is a fast acting contact herbicide and aids in control of weeds through a process of membrane disruption. The foliar uptake of SHARPEN WG Herbicide is rapid and plant desiccation can occur within 4 days of application. Application of SHARPEN WG Herbicide should target small actively growing weeds. Subsequent germinations will not be controlled.

SYMPTOMS
SHARPEN WG Herbicide is rapidly absorbed through the foliage of plants. Within a few hours following application, the foliage of susceptible weeds will show signs of desiccation, and in subsequent days necrosis and death of the plant.

COMPATIBILITY
SHARPEN WG Herbicide should always be used with Hasten Spray Adjuvant or a high quality methylated seed oil (mso).
For most uses as per the Directions for Use SHARPEN WG Herbicide should always be tank mixed with Roundup Attack. It is also compatible with Roundup2 DST, Roundup Ready2 Herbicide with Plantshield1, Credit1 + Bonus1 or Roundup PowerMAX. SHARPEN WG Herbicide is also compatible with partner herbicides commonly used with knockdown herbicides including, Amicide Advance 700, Amicide 625, Nufarm Surpass1 475, Estercide1 Xtra 680, Nugran (triasulfuron), Rifle1 440, Stomp1 440, Stomp Xtra and Triflur X1 (trifluralin). Other compatible products include Revolver1, Nuquat1, Alliance1, Amitrole T, Nu- trazine 600 and Nu-trazine 900DF. This compatibility claim is restricted to a three-way mix of SHARPEN WG Herbicide with any one of the above partner herbicides plus Roundup Attack (provided the Roundup Attack Herbicide label includes a claim of compatibility with that partner herbicide).

RESISTANT WEEDS WARNING
GROUP G HERBICIDE
SHARPEN WG Herbicide is a member of the pyrimidindiones group of herbicides. Its mode of action is through a process of membrane disruption, which is initiated by the inhibition of the enzyme protoporphyrinogen oxidase. This inhibition interferes with the chlorophyll biosynthetic pathway. For weed resistance management SHARPEN WG Herbicide is a Group G herbicide. Some naturally occurring weed biotypes resistant to SHARPEN WG Herbicide and other Group G herbicides may exist through normal genetic variability in any weed population and increase if these herbicides are used repeatedly. These resistant weeds will not be controlled by SHARPEN WG Herbicide or other Group G herbicides. Since the occurrence of resistant weeds is difficult to detect prior to use, BASF Australia Limited accepts no liability for any losses that may result from the failure of SHARPEN WG Herbicide or other Group G herbicides.

TIMING
Application should be made to small, actively growing weeds up to 10 leaf in stage (Note: Fleabanes, small flowered mallow, bladder ketmia and volunteer cotton, maximum 6 leaf; volunteer canola, maximum 4 leaf). As SHARPEN WG Herbicide is a contact herbicide, best control is achieved when weeds are exposed and are not shielded by other weeds and/or stubble.

MIXING
Add half the required volume of water to spray tank and start agitation. Add the measured amount of SHARPEN WG Herbicide and allow product to disperse. Add any partner SC or WG herbicide next if it should be added, before an EC, followed by Roundup Attack Herbicide (if required). Add balance of water to tank and add Hasten Spray Adjuvant or a high quality methylated seed oil (mso) at 1%. Maintain good agitation at all times until spraying is completed.

APPLICATION
The best application conditions are when soil is moist, weather fine and rain unlikely within one hour or as specified for the knockdown herbicide. SHARPEN WG Herbicide is rainfast one hour after application. Burndown activity may be reduced if rain or irrigation occurs within one hour of application. Extremes in environmental conditions eg. temperature and moisture, soil conditions and/or cultural practices may affect the activity of SHARPEN WG Herbicide.
SHARPEN WG Herbicide is a light activated herbicide and under intense light, warm and moist conditions, herbicide symptoms may be accelerated. Under very dry conditions, the expression of herbicidal symptoms is delayed and weeds hardened off by drought are less susceptible to SHARPEN WG Herbicide.
Stubble loads will interfere with coverage and could affect the performance of SHARPEN WG Herbicide. Reduced performance may also occur where weeds are covered with dust or silt.
Ground sprayers
Apply SHARPEN WG Herbicide as a broadcast application using a conventional boom sprayer with either mechanical or by-pass agitation.
Nozzles
Spray equipment should be properly calibrated to ensure correct and uniform application. Use a spray volume of 80 to 250 litres per hectare (minimum 80 L/ha for volunteer cotton). Increase water volume if weed infestation is dense and/or tall. To minimise off-target drift use the lowest pressure and boom height which provides uniform coverage.
Use only COARSE spray quality or greater according to the ASAE S572, when used in tank mix with Roundup Attack .

APVMA Compliance Instructions for Mandatory COARSE or Larger Droplet Size Categories

Important Information
These instructions inform users of this chemical product how to lawfully comply with the requirement of a COARSE or larger spray droplet size category for spray application.
Spray droplet size categories are defined in the ASAE S572 Standard (newer name may also be shown as ASABE) or the BCPC guideline. Nozzle manufacturers may refer to one or both to identify droplet size categories, but for a nozzle to comply with this requirement, the manufacturer must refer to at least one.
In the following instructions, Section 1 is for ground application.
Complying with the label requirement to use a specific droplet size category means using the correct nozzle that will deliver that droplet size category under the spray operation conditions being used. The APVMA has approved only the following specific methods for choosing the correct nozzle. Use one of the methods specified in these instructions to select a correct nozzle to deliver a
COARSE or larger droplet size category.

SECTION 1 Instructions for Ground Application – for COARSE droplet size or larger categories Mandatory Instructions for Ground Applications

USE ONLY nozzles that the nozzles’ manufacturer has rated to deliver a COARSE, a VERY COARSE or an EXTREMELY COARSE droplet size category as referenced to ASAE S572 or BCPC. Choose a nozzle specified to provide the droplet size category required in the label Spray Drift Restraints.

DO NOT use a higher spray system pressure than the maximum the manufacturer specifies for the selected nozzle to deliver the droplet size category required in the label Spray Drift Restraint.

Sections 2 and 3 are not applicable to this label.

SPRAYER CLEAN OUT
After SHARPEN WG Herbicide is applied the following process should be followed to clean the spray equipment.
1. Completely drain the spray tank, rinse the sprayer thoroughly, including the inside and outside of the tank and all in-line screens.
2. Fill the spray tank with clean water and flush hoses, spray boom and lines, screens, filters and nozzles.
3.  Add a detergent such as Omo or Spree or similar at a rate of 100 g per 100 L water or Nufarm Tank & Equipment cleaner or similar at recommended rates and circulate through sprayer for 5 minutes, then flush all hoses, spray boom, screens, filters and nozzles for a minimum of 15 minutes.
4. Drain tank completely.
5. Add enough clean water to the spray tank to allow all hoses, spray boom, screens, filters and nozzles to be flushed for 2 minutes.
6. Remove all nozzles and screens and rinse them in clean water.

Residues of SHARPEN WG Herbicide remaining in the sprayer may cause injury to the following treated crop.
Properly dispose of all cleaning solution and rinsate safely in accordance with Federal, State, and local regulations and guidelines. DO NOT apply sprayer cleaning solutions or rinsate to sensitive crops.

CROP PLANT BACK & ROTATION RECOMMENDATIONS
SHARPEN WG Herbicide does not provide long-term residual activity; however, certain crops show sensitivity to soil residues. Refer to the following table for application-to-sow intervals applicable to the maximum label rate.

1 hour: 
Barley
Wheat
Oats
Corn
Chickpea
Faba bean
Field pea
Lentil
Lupin
Sub clover
1 day: 
Cowpea
Sorghum
Soybean
6 weeks: 
Cotton
Canola
16 weeks: 
Sunflower
Other crops

Check the label of any product mixed with SHARPEN WG Herbicide, to determine any plant back periods or restrictions on use.

RE-ENTRY
DO NOT allow entry into treated areas until the spray has dried, unless wearing cotton overalls buttoned to the neck and wrist (or equivalent clothing) and chemical resistant gloves. Clothing must be laundered after each day's use.

Registered for culturesRate
Spring barley17 - 26 g
Winter barley17 - 26 g
Spring oats17 - 26 g
Winter oats17 - 26 g
Winter wheat17 - 26 g
Spring wheat17 - 26 g
Cotton17 - 26 g
Chickpeas17 - 26 g
Beans17 - 26 g
Peas17 - 26 g
Lentils17 - 26 g
Lupines17 - 26 g
Cowpea17 - 26 g
Clover17 - 26 g
Sorghum17 - 26 g
Soybeans17 - 26 g
Citrus17 - 26 g
Almonds17 - 26 g