a herbicide of
the triazine class.
The compound is used to control broad-leaved weeds and annual grasses.
It is available in the formulations of
wettable powder, water dispersible
granule, liquid, and granular.
Trade names are Princep, Aquazine (58)
moderately soluble (3,5 mg/L) and has a low tendency to be absorbed
to organic matter or into the soil, although it can adsorb to clay
Therefore Simazine highly mobile and can leach into ground water systems.
Simazine is used as a pre-emergence
herbicide used for control of broad-leaved and grassy weeds on a
variety of deep-rooted crops such as artichokes, asparagus, berry
crops, broad beans, citrus, etc., and on non-crop areas such as farm
ponds and fish hatcheries.
Its major use is on corn where it is
often combined with AAtrex. Other herbicides with which simazine is
combined include: paraquat, on apples, peaches; Roundup or Oust for
noncrop use; Surflan on Christmas trees; Dual on corn and
Relative to atrazine and metolachlor, simazine is used on a wider
variety of crops—including corn (about 40 percent of total use),
citrus orchards (about 35 percent), and other orchards and vineyards
(about 20 percent).
Simazine was generally detected more frequently than atrazine and
metolachlor in Florida and California, which is consistent with its
higher use in orchards and vineyards in those areas.
simazine-degradate and aldicarb degradate concentrations were
generally highest and most variable at sites with shallow water
tables and from shorter sampled zones (10-ft-long screened
intervals) near the water-table interface.
studies in rats, no teratogenic effects were noted at levels below
those that produced maternal toxicity.
reproductive effects were observed in a three-generation study in
albino Charles River rats receiving 50 or 100 ppm simazine in the
residues were found in corn grain or pinto bean pods, while trace
amounts were found in pinto bean foliage and cucumbers.
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