Physical Description:
Contains 150 g/litre of picloram and 225g/litre of clopyralid both as the monoethylolamine salt in the form of a soluble concentrate.
Chemical Group:
Substitute pyridine.
Uses:
Purge is a selective herbicide for the control of certain broadleaf weeds in fodder brassica crops. Weeds controlled include fathen and black nightshade which are two of the most competitive weeds in brassica crops and can cause major yield suppression regardless if the paddock is cultivated or direct drilled.
Benefits:
Purge is commonly used at very low rates (350mls/hectare) for post emergent broadleaf weed control in fodder brassicas in conjunction with a spraying oil such as Collaborate. Purge provides a wide window of opportunity for control of broadleaf weeds. Purge can be used from when the weeds are at 2 leaf stage right through to 8 leaves of the weed species.
Application:
For control of Fat hen, black nightshade, thorn apple and suppression of redroot use 350ml/ha. Water rates are determined by application method, for aerial and boom application use 100 – 300 litres per hectare as a coarse quality spray. When applying by CDA do not use less than 30 litres of water per hectare with a droplet size of 250 – 300 microns. Trials indicate CDA application may not be as effective as conventional boom spraying.
Always apply Purge to fodder brassicas in combination with Collaborate Spray Oil at 500 ml per 100 lt spray mix for aerial and ground spray use. For CDA applications use 500 ml per ha
Application rates can vary depending on the weed(s) being treated and the crop or situation of use, for the correct rate always refer to the product label.
Withholding period:
Stock:
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No withholding period exist for grazing animals but it is always best not to graze for 10 days following application to allow the chemical a chance to translocate and photosynthesize. However poisonous plants may become more palatable after treatment, stock should then be kept off until weeds have died down.
Plant back periods:
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Do not plant susceptible crops such as potatoes, peas, lucerne, beans, cucurbits, tomatoes and other picloram sensitive crops within 1 year of applying up to 350ml/Ha. In areas with rainfall of less than 800mm per annum, or with heavy poor draining soils this may be extended up to 2 years.
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Cereal crops may be sown following brassicas treated with Purge
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Clover may be established after brassicas treated with Purge, after 6 months and following thorough ploughing and cross cultivation.
Mode of action:
Clopyalid and picloram are both absorbed by leaves, stems and roots; both then translocate through the plant, interfering with cell division and stem elongation.
Environmental fate:
Picloram is degraded by light, so occurs more rapidly at the soil surface or in water. Soil half life is 30-90 days.
Clopyralid is degraded slowly in the soil CO2. Soil half life can vary from 8-66 days
dependant on conditions.
Storage and handling:
Stores containing more than 100lt of Purge are subject to signage and secondary containment, if storing more than 1,000 litres then an emergency response plan is required.
Purge must be sold to, and under the control of, an approved handler when used in any quantity.
Store Purge in tightly sealed original container, out of reach of children and away from foodstuffs, fertiliser and seeds. Always store in accordance with NZS Management of Agrochemicals.
When using avoid contact with skin and eyes, avoid inhalation of spray mist and wear protective clothing such as gloves, eye protection, overalls and boots.
For further information:
Click to view the Purge Front Label and the Purge booklet label
Click for information on AgRecovery
MSDS (Material Safety Data Sheet):
Click for the Purge MSDS (Material Safety Data Sheet)
Registered pursuant to the ACVM Act 1997, P7946