This content is current only at the time of printing. This document was printed on 30 November 2020. A current copy is located at https://apvma.gov.au/definition-of-terms/w
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Definition of terms
|waiting period||withholding period|
General warning statements and precautions required for safe handling and use of specified chemicals. General warning statements are listed in Appendix F of the Standard for the uniform scheduling of medicines and poisons .
From s. 3 of the Agvet Code:
Means a monitoring warrant or an investigation warrant.
|investigation warrant, monitoring warrant|
An additive that typically removes ammonia, nitrites, nitrates, chlorine and chloramines from the water.
The extent to which a water sample contains high levels of calcium and magnesium ions that bind with amine formulations causing them to be less soluble and therefore less effective. Hard water can lead to poor mixing of the chemical with water and affect the balance of the surfactant system. It also affects properties such as wetting, emulsification and dispersion, especially with emulsifiable concentrates.
A property of a pesticide that is its saturation concentration in pure water at a given temperature. It is generally expressed in grams per litre (g/L) or milligrams per litre (mg/L).
|water-dispersible granules or tablets||
A formulation consisting of granules or tablets to be applied after disintegration and dispersion in water.
|granules, wettable, tablet, water-dispersible tablet|
|water-dispersible powder||powder, wettable powder|
|water-dispersible powder for slurry seed treatment||
A powder to be dispersed in water before application as a slurry to the seed.
The APVMA formulation type code for water-dispersible powder for slurry seed treatment is WS.
A two-phase concentrate that contains solid pesticide suspended in a liquid that is capable of suspension in water.
|water-dispersible slurry seed treatment||slurry, powder, water-dispersible powder for slurry seed treatment|
A formulation in the form of tablets to be used individually, to form a dispersion of the active constituent after disintegration in water.
The APVMA formulation type code for a water-dispersible tablet is WT.
A primary pack that consists of a sealed water-soluble bag that retains the contents under dry conditions. The water-soluble bag may provide a reduced operator exposure to the content and provide the convenience of a specific dose. The bag should dissolve or disintegrate when placed directly into a specific amount of water to release all its content.
A gelatinised formulation to be applied as an aqueous solution.
The APVMA formulation type code for water-soluble gel is GW.
A powder formulation to be applied as a true solution of the active constituent after dissolution in water, but which may contain insoluble inert ingredients.
The APVMA formulation type code for water-soluble granule is SG.
|water-soluble granules or tablets||
A formulation consisting of granules or tablets to be applied as a true solution of the active constituent after dissolution in water, but which may contain insoluble inert ingredients (excipients).
A formulation consisting of granules to be applied as a true solution of the active constituent after dissolution in water, but which may contain insoluble inert ingredients.
The APVMA formulation type code for water-soluble powder is SP.
|powder, water-soluble powder, water-soluble powder for seed treatment|
|water-soluble powder for seed treatment||
A powder to be dissolved in water before application to the seed.
The APVMA formulation type code for water-soluble powder is SS.
|web content management system (WCMS)||
An application that can be readily used by multiple authors to create, maintain, manage and publish content on web pages.
A plant that is growing in a situation where it is not wanted or where it interferes with a desirable plant.
Weeds generally interfere with activities of humans or their welfare. Weeds can include wild species, garden escapes and volunteer crop plants. Plants may be desirable plants in one situation (eg in a planted crop), but weeds in another situation (eg growing as volunteer plants in a planted crop of another species).
|weed control, weed eradication, weedicide, weedkiller, weed suppression|
The process of limiting weed infestations or killing weeds for aesthetic, economic, public health or other reasons.
The elimination of all live plant parts and seeds of a weed from a site.
To retard or inhibit weed growth.
Samples are analysed fresh, with no allowance made for moisture content.
|wettable granule||granule, wettable|
|wettable or water-dispersible granule||
A formulation consisting of granules to be applied after disintegration and dispersion in water.
The APVMA formulation type code for a wettable or water-dispersible granule is WG.
|wettable powder||powder, wettable powder|
A chemical or mixture of chemicals added to some pesticide sprays to improve wetting, and thereby causing the spray to spread and wet the leaf surfaces more readily. Wetting agents work by reducing the surface tension and contact angle of a liquid, thereby increasing the spread of a liquid on a surface.
World Health Organization of the United Nations. Headquarters are in Geneva, Switzerland.
A wild plant, flower or animal. Term often used in forestry to describe trees not deliberately planted in cultivated forest.
The condition of plants that have lost excessive amounts of water by transpiration through the leaves. Such plants droop and their leaves and stems become flabby.
Pushing plant material into a long narrow heap to accelerate drying (desiccation) of the leaf material and/or of the seed head.
The rate of change of the vector wind with distance in a specified direction normal to the wind direction. Shear is an important property of the wind field (ie shear at a well-marked frontal surface may produce shearing instability).
A plant that germinates in the autumn, lives over winter, produces its seed during the following spring and then dies.
Similar to a withholding period, but applied to medicated feed or water—the interval in days during which medicated feed or water should be withdrawn from livestock prior to slaughter or the collection of milk or eggs for human consumption.
From s. 3 of the Agvet Code:
In relation to the use of a chemical product, means the minimum period that needs to elapse between:
(a) the last use of the product in relation to a crop, pasture or animal, and
(b) the harvesting or cutting of, or the grazing of animals on, the crop or pasture, the shearing or slaughtering of the animal, or the collection of milk or eggs from the animal for human consumption, as the case may be
in order to ensure that the product’s residues fall to or below the maximum limit that the APVMA permits.
The minimum period that must elapse between the last use of an agricultural or veterinary chemical product in relation to a crop, pasture or animal and the harvesting or cutting of, or the grazing of animals on, the crop or pasture, the shearing or slaughter of the animal, or the collection of milk or eggs from the animal for human consumption, as the case may be, in order to ensure that the product’s residues fall to or below the Australian maximum residue limit. The required withholding period(s) will be included as a label instruction on an approved label.
The precision for an analytical test or procure with a single run in a single laboratory.
|without appreciable risk||
The practical certainty that injury will not result even after a lifetime of exposure.
Plants that develop wood as structural tissue. This type of plant is generally perennial and includes trees and shrubs.
|work instructions (WIs)||
Internal APVMA documents that contain instructions and set out the process, standards or criteria to be adhered to in delivering a service.
From s. 3 of the Agvet Code:
A day other than a Saturday, a Sunday or a day that is a public holiday in the place where the office of the APVMA is situated.
In terms of manufacturing, the documents associated with each batch of product manufactured, eg batch manufacturing formulae, manufacturing (or processing) and packaging instructions. These documents are based on, and may be authorised photocopies of, master documents.
An organism at passage level between master seed and production seed.
|working seed lot (WSL)||
A homogeneous suspension of cells or organisms derived from the master seed lot (MSL) under defined conditions and aliquoted into individual containers for storage. The WSL is used at a defined passage level for routine production. Containers for MSL and WSL, once removed from storage, must not be returned to the seed lot stock.
A culture of microorganism derived from the master seed lot and intended for use in the production. Working seed lots are distributed into containers and stored.
Treatments applied directly to wounds or fly-strike-affected areas on individual sheep.