Blackberry control manual - Weeds Australia

Picloram
MOA Group I, e.g. Tordon® granules, Vigilant® gel
How it works Advantages Disadvantages Comments
Selective, systemic
herbicide absorbed
through the foliage
or roots.
••Gives residual activity.
••Formulated in pellets or
gel; this may be desirable
in some locations and
can extend the time of
application.
••Will not kill grasses.
••Low toxicity to mammals.
••Moderately toxic to fish.
••Harmful to many desirable
trees and shrubs where
the roots from these plants
extend into areas that are
treated.
••Mobile in the soil and may
leach or move from the site
of application.
••Recommended where
pelleted formulation is
considered the most
appropriate application
technique.
••It is persistent in the soil
giving an extended period
of uptake by the blackberry.
Half life of 90 days (range
20 – 300 days).
Hexazinone
MOA Group C, e.g. Hexazinone 250 SL®, Velpar® L
Residual herbicide
absorbed by the
foliage and the roots.
••Low toxicity to mammals
and fish.
••Mobile in the soil and may
leach or move from the site
of application.
••Can cause severe damage
or kill many desirable trees
and vegetation.
••Persistent in water (half life
> 56 days).
••Slightly toxic to fish and
aquatic organisms.
••Use only in pine plantations
and around industrial
buildings.
* Can be applied using foliar
spray, spot application or
stem injection.
* For residual control from
spot application sufficient
rainfall is required after
treatment to promote root
absorption.
* Do not apply on or near
desirable trees or where
there could be a surface
flow of water.
Amitrole + ammonium thiocyanate (This mixture is always sold as this drum mix.)
MOA Group Q, e.g. Amitrole T®, Weedeath® or Oxalis Sour Sob Killer®
Inhibits carotenoid
biosynthesis.
••Some naturally occurring
resistant weed biotypes
exist.
••Non-selective, so may
damage crops, pastures and
some ornamentals.
••Registered for use in
and around non-crop
areas, around buildings,
commercial and industrial
areas, gardens and public
service areas and rights of
way.
* Requires two applications
during the one growing
season, and follow-up
treatment in the next
growing season.
* Apply in December/January
and respray in autumn.
* Limited use for control in
many situations.
* Do not apply to bushes with
mature or developing fruit.
* denotes critical comment from the label
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