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research Pyrethrins and
Pyrethroids Fact
Sheet -
National Pesticide Information Center Pyrethrins and
pyrethroids on the
EXTOXNET Pyrethrin and Permethrin...
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synthetic insecticides based on
natural pyrethrum (
pyrethrins); one
common example is permethrin.
Pyrethrins are
often sold in
preparations that also contain...
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Pyrethrin II is an
organic compound that is a
potent insecticide. It is one of the two
pyrethrins, the
other being pyrethrin I.
Thousands of tons this...
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Pyrethrin I is one of the two
pyrethrins,
natural organic compounds with
potent insecticidal activity. It is an
ester of (+)-trans-chrysanthemic acid with...
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combination with insecticides, such as
natural pyrethrins or
synthetic pyrethroids, in
ratios (PBO:
pyrethrins)
ranging from 3:1 to 20:1.
Appearing in over...
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speeding the
effects when
compared with
pyrethrins used alone.
These formulations are
known as
synergized pyrethrins. In the
novel Anna Karenina, the character...
- A
pyrethroid is an
organic compound similar to the
natural pyrethrins,
which are
produced by the
flowers of
pyrethrums (Chrysanthemum cinerariaefolium...
- "pyrethrum." The
flowers are
pulverized and the
active components,
called pyrethrins,
contained in the seed cases, are
extracted and sold in the form of an...
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insecticides because they are more cost-effective and
longer acting than
natural pyrethrins. λ-and γ-cyhalothrin are now used to
control insects and
spider mites...
- insecticide. The
flowers are pulverized, and the
active components,
called pyrethrins,
which occur in the achenes, are
extracted and sold in the form of an...
