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Cambistat
Vegetation Management FAQ's
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Cambistat® 2SC
is
a soil-applied tree growth regulator (active ingredient paclobutrazol)
that reduces tree growth 40% to 60%
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When should I apply Cambistat relative to pruning?
Depending on the results you desire:
- To maintain a manicured look apply Cambistat about 30 –
40 days before pruning.
- To allow some regrowth and a more natural look, apply Cambistat
at the time of pruning.
What is the best time during the year to apply Cambistat?
Cambistat can be applied anytime during the growing season as long
as the ground is not frozen or saturated with water.
Will surrounding vegetation be regulated?
Grass, shrubs, flowers and other vegetation will be regulated if
the roots of these plants come in contact with the applied Cambistat.
Is over regulation a possibility – can I harm a tree?
It is not likely that you will over-regulate a tree if you follow
label directions. If by accident you over apply, leaves and branches
will likely be smaller. If you learn that you over applied, you
can remove the soil at the base of the tree which will reduce the
amount of Cambistat available for uptake, thereby reducing the amount
of over-regulation.
Will use of Cambistat replace trimming?
No. Use of TGR’s reduces shoot growth which reduces frequency
of trimming. If a strict trim cycle is maintained, Cambistat will
reduce the amount of vegetative growth necessary to remove.
How long does Cambistat last?
Reapplication is recommended every 3 years. However, on some tree
species, effective regulation lasts up to eight years. When considering
reapplication, it is always helpful to look at the tree for confirmation
that reapplication is necessary.
Is Cambistat safe for people, pets & wildlife?
The Environmental Protection Agency has granted a Caution label
to Cambistat concentrate which is the lowest possible signal word
available from the EPA. Secondly, Cambistat is diluted with 11 parts
water and injected in the soil next to the tree by licensed and
experienced application professionals. The tree roots absorb Cambistat
and it moves into the canopy removing it from the soil and using
it inside the tree. Finally, there are no reported adverse health
effects after ingestion of vegetation by humans or animals.
What are the effects of Cambistat in groundwater?
Laboratory and field studies have been conducted as part of the
standard battery of toxicological studies for acceptance by the
EPA. It has been concluded that paclobutrazol has low mobility in
soil. In a field study in sandy loam soil in North Carolina, with
irrigation of 8.47 inches of water over thirty days, no paclobutrazol
was was detected below 6 inches in soil.
Do rates apply to my region of the country?
The rates indicated on the rate chart apply throughout the country.
However, if the tree species
you plan to treat is not on the rate card, please contact RTSA.
We may have experimental rates that
we are working with. If we do not have rates that we can recommend,
we can work with you to
develop rates.
What is the background of this product – research, field
performance?
Paclobutrazol has been university researched and field tested for
over 30 years and has been used in the utility industry in its present
formula for more than eight years. It has been proven effective
in all parts of the country.
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