Prefix -D
®
A residual, root absorbed herbicide for the control of a wide
range of annual and perennial broadleaf and grass weeds.
Active Ingredient:
Chemical Group:
•
•
•
•
Contains 67.5 g/kg of dichlobenil in the form of a pellet.
Sulphamide.
Provides long lasting control of many weeds
Formulated in an easy-to-use pellet
Can be used under a wide range of ornamental trees and shrubs
Recommended for many berryfruit types
General Information
PREFIX-D is a soil-acting herbicide, containing 67.5 g/kg dichlobenil in the form of a pellet, which is highly
effective against a wide range of broadleaf and grass weeds. Applied as directed, PREFIX-D will give longterm weed control (up to 6 months) depending on application rate, soil and climatic conditions. The higher
the application rate the longer the period of control. Weeds with some degree of resistance (e.g.
established couch and mature docks) can be spot treated when they reappear. For best results application
of PREFIX-D should be restricted to the colder, wetter times of the year (April-September), and before active
plant growth commences.
PREFIX-D is suitable for the selective control of weeds in established perennial crops such as forestry
plantations, cane fruit, bush fruit, pipfruit, around certain ornamental trees and shrubs, and for total residual
weed control on or around industrial areas, farmyards, buildings, fence lines, paths, driveways, leisure areas,
play grounds, and prior to laying concrete, asphalts and paving.
Mode of Action
The roots absorb dichlobenil, the active ingredient in PREFIX-D, with rapid translocation throughout the
plant. In susceptible species PREFIX-D inhibits actively growing meristems of both roots and shoots,
germination of seeds and damages rhizomes. It has no effect on cell respiration or photosynthesis, but
inhibits cellulose synthesis.
Directions for Use
Non-Selective Uses
Use situation
Rate
Critical Comments
Industrial areas,
farmyards, around
buildings, fence lines,
paths, driveways,
leisure areas and play
grounds
190-380 kg per
treated hectare
2
(19-38 g/m )
Apply PREFIX-D granules evenly to the area being treated. For cracks in
concrete and bitumen and joints in paving sprinkle on PREFIX-D and
brush in, then water in thoroughly with a fine mist spray. If treating slopes
or watering in, be careful that the pellets are not washed onto lawns or
areas where susceptible plants are growing.
Prior to sealing:
190-380 kg per
treated hectare
(19-38 g/m2)
Evenly apply PREFIX-D granules after formation of the area to be sealed
and prior to the application of bitumen. The granules may be incorporated
by mechanical means, or light overhead watering, in conjunction with the
final compaction.
190-380 kg per
treated hectare
(19-38 g/m2)
Sprinkle PREFIX-D evenly onto the bedding sand before laying paving.
Following lying, but before compaction, mix PREFIX-D with dry sand and
sweep into the joints. Water in with a fine mist spray.
Roads
Paths
Tennis courts
Paving
BASF
Prefix® D Herbicide
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Selective Uses
Crop
Rate
Remarks
Tree releasing:
Acacia, Cupressus,
Pinus and Picea
species, Juglans nigra
110 kg per
treated hectare
(11 g/m2)
Spot application of PREFIX-D for tree release may be carried out using
the Weed-A-Metre hand held device available from the New Zealand
Forest Research Institute Limited, Rotorua.
Raspberries,
Boysenberries,
Blackberries,
Loganberries,
Youngberries,
Dewberries
80-110 kg per
treated hectare
Apply as a band (at least 60 cm wide) over the row to established crops
prior to sucker emergence. If application is delayed until after bud burst
some sucker suppression on early raspberries will occur. Boysenberries,
loganberries and brambles are unaffected. Early application (prior to
August) is recommended in the case of raspberries to avoid this problem.
Blackcurrants,
Gooseberries
80-110 kg per
treated hectare
Apply as a band treatment. Treat only established bushes (at least two
years old). Apply prior to August.
Pipfruit
90-170 kg per
treated hectare
(9-17 g/m2)
Apply as a band along the row or encircling each trunk of mature trees (at
least 7 years old). Applications must be made prior to growth occurring
(before August). Younger trees may be safely treated in the season of
planting provided the soil around them is well settled. Some marginal
yellowing of foliage may occur (without affecting extension growth or yield)
where high rates are used on light soils followed by irrigation or when
drought follows application. Do not treat Golden Delicious apples or
grapes with PREFIX-D.
Ornamentals and
hedges
50-110 kg per
treated hectare
2
(5-11 g/m )
Light soil incorporation to a depth of 1cm is an advantage. Large areas
should not be treated without first establishing plant tolerance under local
conditions. Do not use PREFIX-D under azaleas, cotoneaster species,
escallonia, fuchsias, non-woody perennials or where seeds or seedlings
of annual plants are to be grown during the next two years.
PLANTS THAT MAY BE SAFELY TREATED INCLUDE: Abelia, acacia,
ash, banksia, bottlebrush, beech, birch, camellia, cedars, conifers,
cupressus, Erica, elms, grevillia, hakea, hebe, hibiscus, juglans nigra,
junipers, liquid amber, maple, magnolia, poplars, protea, rhododendrons,
manuka, viburnum and willow.
Note: Roses should only be treated during the dormant season.
Pasture weeds: Docks
Ragwort Thistles
Approximately
1/4 teaspoon
Apply as a spot treatment to the crushed centre of each plant.
Weeds Controlled:
Some of the common weeds controlled by PREFIX-D under temperate climatic conditions include:
Amaranthus, annual poa, barley grass, barnyard grass, black nightshade, bracken, bristle grass,
Californian thistle, Canadian fleabane, catsear, chamomile, chickweed, cleavers, cocksfoot, comfrey,
couch, creeping bent, creeping fog, dandelion, docks, fathen, fescue, fumitory, groundsel, hawkesbeard,
nettles, nutsedge, pale persicaria, plantains, poa pratensis, ryegrass, shepherd’s purse, sorrel, sow
thistle, speedwell, spurrey, summer grass, thistles, wild carrot, yarrow and Yorkshire fog.
Resistant Weeds:
Field bindweed, giant, creeping and bulbous buttercup, rushes, silverweed, sweet vernal, and white
clover. White clover and field bindweed can be controlled by spot application with a high dose.
Application:
For best results application of PREFIX-D should be restricted to the colder, wetter times of the year (AprilSeptember), and before active plant growth commences. Delayed application can reduce effectiveness
and control. In selective use situations the recommended dose rates and timing of application for
PREFIX-D must be strictly followed. As PREFIX-D is volatile it is advisable to either lightly incorporate or
irrigate treated areas if rain does not fall soon after application. For best results the ground should be
weed free and moist.
Apply PREFIX-D evenly by hand, shaker, Weed-A-Metre, or a suitable mechanical spreader. Apply only
to established crops. Ensure that granules do not fall, blow or get washed on to other areas than those
intended for treatment. Prevent granules from lodging on crop leaves or in axils. For this reason
treatments should NOT be carried out when rain is falling or the foliage is wet. Avoid local overdosing.
BASF
Prefix® D Herbicide
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The Weed-A-Metre Granular Herbicide Applicator
Lightweight - only 250gm
Simple to use
No waste
Very accurate
No spray drift
Drains:
Application to drains, ditches and irrigation channels must only be made when these waterways are dry,
and at least 2 months is allowed to elapse before the channels are used for carrying water.
Caution:
Apply only to established fruit trees and ornamentals. Prevent granules from lodging on crop leaves or
leaf axils. Do not use near grapes, citrus, stonefruit or in or near a glasshouse.
Rainfall/ Irrigation:
Rain or irrigation is required following treatment to move the chemical from the granules into the soil. As
PREFIX-D is volatile it is advisable to either lightly incorporate or irrigate treated areas if rain does not fall
soon after application.
Ornamental Trees, Shrubs and Hedges
PREFIX-D is absorbed primarily through the roots. Established trees and shrubs are generally not affected
because their roots are below the level to which PREFIX-D penetrates. Before treating large areas,
establish plant tolerance under local soil and climatic conditions by treating a small area as a trial plot. As a
GUIDE ONLY, the following plants have been established as tolerant to 44 kg per treated hectare
chlorthiamid [which converts in plants and soil to the herbicidally active dichlobenil (PREFIX-D)] in trials
conducted at Massey University.
GENERAL SPECIES
Abelia grandiflora
Acer cappandocicum
Acer palmatum
Adenadra uniflora
Alnus glutionosa
Aeigela
Berberis spp
Boronia Megastigma
Camellia japonica
Camellia sasanqua
Celtis spp
Chamaecypris Lawsoniana
Cryptomeria japonica
Cupressus cashmeriana
Daphne leucanthe
Erica oatesii
Eunonymus spp
COMMON NAMES
Maple (70’)
Japanese Maple (20’)
Pieris or Lyonia (2-3’)
Alder (60-90’)
Apple Blossom
Berberis
Boronia
Camellia
Camellia
Hackberry
Lawsoniana-Cypress
Macrocarpa
Daphne
Heath
Euonymus
GENERAL SPECIES
COMMON NAMES
Acacia melanoxylon
Acer negundo
Acer pseudoplantanus
Agonis flexuosa
Amelanchier canadenis
Beaufortia sparsa
Betula pendula
Buxus semperevirens
Camellia saluensis hybrids
Carpinus spp
Chaenomeles Japonica
Crataegus spp
Cupresses macrocarpa
Daphne burkwoodii
Erica canaliculata
Erica carnea
N.B. Do not use on
E.radicans, E.variegates or
E.vegetus
Australian Blackwood
Common Box elder (50’)
Sycamore Maple (10’)
Willow myrtle (8’)
Shad-bush (8-10’)
Swamp bush myrtle 4-6’
Birch (30-70’)
Box Tree
Camellia
Hornbeam
Cydonias-Japonicas
Hawthorn
Macrocarpa
Daphne
Heath
Heath
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Prefix® D Herbicide
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GENERAL SPECIES
COMMON NAMES
GENERAL SPECIES
COMMON NAMES
Fagus sylvatica
Felica angustifolia
Franxinus spp
Hydrangea hortensis
Juglans nigra
Juniperus communis
Beech
Felica (3-5’)
Ash
Hydrangea
Black Walnut
Juniperus (4’)
Feijoa sellowiana
Forsythis spp
Gardenia jasminoides
Ilex spp
Juniperus chinensis
Juniperus lorizontalis
plumosa
Fruit Salad Tree
Golden Bells
Gardenia
Juniperus sabina
tumariscafolia
Juniperus virginiana
semi prostrate
Tea Tree
Leucospermum
oatherinaea
Lonicera spp
Magnolia deciduous
species
Malus spp and vars
Osmathus spp
Philadelphus coronarius
Picea abies
Picea sitchensis
Pinus patula
Pinus sylvestris
Pittosporum tenuifolium
Podocarpus spp
Podocarpus ferrungineus
Prunus spp
Protea
Leptosperum scoparium
vars
Leucothoe cataesbi
Lily valley shrub
Honeysuckle
Magnolia
Magnolia stellata
Magnolia evergreen
Magnolia
Magnolia
Apple
Osmanthus
Mock Orange
Spruce
Spruce
Mexican Pine
Scotch Pine
Kohuhu
Michelia spp
Pheballium billardieri
Photina glabra rubens
Picea pungens
Pieris japonica
Pinus radiata
Pittosporum tobira
Pittosporum eugenioides
Podocarpus dacrydioides
Populus spp
Prunus campanulata
Michelia
Satinwood
Photina
Spruce
Andromeda
Monterey Pine
Quercus robusta
Rhododendron – species
and hybrids
Ribes alpinum
Rosa multiflora
Salix spp
Syringa species and
hybrids
Taxus
Ulmus americana
Viburmun macrocephalum
Oak
Rhododendron
Pyracantha spp
Raphiolepis delacouci
NZ Native Miro
Flowering/Cherries/Plums/
Apricots
Fire thorn
Indian Hawthorn
Ribes spp
Ribes sanguineum
Rosa moschata
Salix matsundana tortuosa
Gooseberries & Currants
Flowering currant
Musk rose
Syringa persica
Thuya spp
Viburnum spp
Persian lilac
Thuya
Juniperus (3’)
Juniperus
Tarata or Lemonwood
NZ White Pine
Poplar
Taiwan cherry
Mountain currant
Willow
Lilacs
Yew
Elm
Chinese snowball
Toxicity
Low toxicity. Acute oral LD50 (rat) >5000 mg/kg. Acute dermal LD50 (rat) >2000 mg/kg.
First Aid
If swallowed, do NOT cause vomiting. Drink water to dilute. If hair or skin contact occurs remove
contaminated clothing and flush skin and hair with running water. If in eyes, wash out with water.
BASF
Prefix® D Herbicide
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Precautions
User:
Keep out of reach of children. When opening the container and using the granules, wear cotton overalls
buttoned to the neck and wrist, washable hat and gloves. Do not eat, drink or smoke while using.
Remove protective clothing and wash hands, face and exposed skin thoroughly before meals and after
work. Wash contaminated clothing before re-use.
Contact and non-contact re-entry:
When fully dry.
Environment:
Toxic to fish. Do NOT contaminate streams, rivers or waterways with the chemical or used container.
Storage:
Store in the closed, original container, in a well-ventilated area, building or room, as cool as possible,
away from children, animals, feed or foodstuffs. Store WELL AWAY from bulbs, tubers, corms and
seeds, as PREFIX-D exhibits high phytotoxicity to buds and germinating seeds.
Disposal:
Ensure container is completely empty. Burn if circumstances, especially wind direction, permit.
Otherwise crush and bury in a suitable landfill. Avoid contamination of any water supply with chemical or
empty container.
Pack Size
5 kg plastic bucket and 25 kg cardboard box.
Transport Information
Not classified as Dangerous Goods for transportation.
Date of Issue
July 2003
Registered pursuant to the Pesticides Act 1979, No. P3234.
® Registered trademark of BASF
© Copyright 2003, BASF New Zealand Limited
Registered to and distributed by:
BASF New Zealand Limited
38 Mahunga Drive, Mangere Bridge
P.O Box 407, Auckland 1015
Tel:
(09) 633-0200
Fax:
(09) 633-0262
BASF