Agriculture
Frequently Asked Questions
Will MAGNACIDE® H Herbicide hurt crops?
If applied according to the label, MAGNACIDE H Herbicide will not
damage any crops. The label allows applications up to 15 ppm with
no restrictions on irrigation.
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What happens to the
aquatic weeds after a treatment?
Submersed aquatic weeds do not have a waxy
cuticle or skin like a terrestrial weed or crop. MAGNACIDE H
Herbicide reacts with specific proteins in the aquatic weed cell
membranes that are exposed due to this lack of a waxy cuticle.
Once this reaction occurs, the cells of the plant rupture. Weeds
become discolored and flaccid. As they lay down on the bottom of
the canal, canal capacity increases, generally in 24 hours. The
weeds disintegrate over the next several days.
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Why do I have to have a pesticide
applicators license to apply MAGNACIDE H Herbicide?
MAGNACIDE H Herbicide is designated by the
US EPA as a "Restricted Use Pesticide" due to its inhalation
hazard and aquatic toxicity. Federal and state laws require this
product to be sold only to licensed pesticide applicators.
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Will MAGNACIDE H Herbicide kill fish?
Fish are very sensitive to this herbicide.
They will be killed at concentrations less than those required for
aquatic weed control. Studies have shown that fish can escape the
treatments if a viable escape route exists. As a rule, MAGNACIDE H
Herbicide should not be used where fish are considered a resource.
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We heard that MAGNACIDE H Herbicide has a
very strong odor. Does this cause any problems during or after an
application?
The active ingredient in MAGNACIDE H Herbicide is acrolein. It
has a strong lachrymator, or tear
producing effect. During an application, when mixed thoroughly
with water, there is minimal odor. Air monitoring of actual
applications has determined this level
to be below permissible exposure levels as set by OSHA.
In most cases, you will not even know it is present in the
water.
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Does MAGNACIDE H Herbicide
build up in soil or crops?
No. MAGNACIDE H Herbicide is a very unique chemical. It is very
reactive and breaks down quickly in the
environment. It reacts with organic matter, aquatic
plants and water itself. In soil, it adsorbs to the soil
particles and immediately becomes
inactive. The naturally occurring bacteria in the soil continue
the breakdown to the final stage of
carbon dioxide and water. In plants, what little chemical is
absorbed is rapidly metabolized into naturally occurring
plant materials. There are no harvest or
plant back restrictions on crops or soil following an application
of MAGNACIDE H Herbicide.
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How do I get training for my
employees in the use of MAGNACIDE H Herbicide?
Training is just a phone call away. Baker Hughes' Crop
Protection Chemical technical sales
representatives set the standard for product stewardship in the
agricultural chemical industry. Training
programs are conducted annually at various locations in
all the countries we operate in. New customers receive
extensive in-field training. Our
personnel are always available to any of our customers to assist
in training on the use of MAGNACIDE H
Herbicide.
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How far will each application travel in
a canal?
One of the big advantages to using MAGNACIDE H Herbicide is the
long distances an application can
travel. Many environmental factors will affect application
distances such as organic content in the water, pH,
abundance and species of weed to name a
few. Velocity is a key factor in getting the longest distance. The
higher the velocity the more distance. A
good rule of thumb is: in a good flowing canal with a
velocity greater than 0.5 miles per hour and aquatic weeds 24
inches or less in length, one can expect control for 8 -12 miles.
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What type of aquatic weeds will
MAGNACIDE H Herbicide control?
It is important to be able to classify the weeds you want to
control. There are 3 main varieties of
aquatic weeds:
- Emergent or emersed weeds. These are weeds that are
essentially terrestrial weeds that
grow in or out of the water. A good example is cattails or water
primrose. MAGNACIDE H Herbicide will not affect these
types of weeds.
- Submersed weeds and algae. These are true aquatic
weeds that grow almost entirely in or
under water. They can be rooted or free floating. A good example
would be Sago pondweed (Potamogeton pectinatus). Algae
are generally free floating, but not
always. Filamentous green algae would be a prime example.
These types of weeds are what MAGNACIDE H Herbicide is
intended to control.
- Floating aquatic weeds. Examples would be
Waterhyacinth (Eichornia crassipes).
MAGNACIDE H Herbicide does not control these very well. You will
see good
control on lower forms of floating aquatic weeds such as
Duckweed.
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Does MAGNACIDE H Herbicide have
any long term effects on people or the environment?
When properly applied, MAGNACIDE H Herbicide does not have any
adverse long term effects on people or
the environment.
Baker Hughes has supported and maintained the EPA
registration for over 30 years. We have
conducted many studies on this chemical, including lifetime
studies of its carcinogenic and oncogenic potential. These studies revealed that
the daily exposure to acrolein over the life of the animal
models did not result in
carcinogenicity.
As mentioned above, acrolein is a very reactive chemical.
Whether in contact with air, water or
soil, it degrades very quickly. The degradation process in both
water and soil proceeds ultimately to
carbon dioxide and water.
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