CE ÎNSEAMNĂ PYRETHRIN ÎN ENGLEZĂ?
piretrină
Piretrinele sunt o pereche de compuși organici naturali obișnuiți din Chrysanthemum cinerariifolium care au o activitate insecticidă puternică. Piretrinele sunt neurotoxine care atacă sistemul nervos al tuturor insectelor. Când sunt prezente în cantități care nu sunt fatale pentru insecte, ele par a avea un efect de repulsie împotriva insectelor. Pyrethrinele înlocuiesc treptat organofosfații și organoclorurile ca pesticide de primă alegere. Ele nu sunt persistente, fiind biodegradabile și se descompun prin expunerea la lumină sau oxigen. Structura chimică a piretrinelor a inspirat producția unei varietăți de insecticide sintetice numite piretroide, cum ar fi bifentrin, permetrin și cipermetrin.
Definiția pyrethrin în dicționarul Engleză
Definiția piretrinei din dicționar este numită și: piretrină I. un compus insolubil în apă uleios folosit ca insecticid. Formula: C21H28O3. Alte definiții ale piretrinei se mai numesc: piretrin II. un compus cu structură și acțiune chimică similare, de asemenea, găsit în piretru. Formula: C22H28O5.
CĂRȚI ÎN ENGLEZĂ ÎN LEGĂTURĂ CU «PYRETHRIN»
Descoperă întrebuințarea
pyrethrin în următoarea selecție bibliografică. Cărți în legătură cu
pyrethrin și extrase din aceasta pentru a furniza contextul de întrebuințare al acestuia în literatura Engleză.
1
The Organic Gardener's Handbook of Natural Insect and ...
Precautions: Pyrethrin insecticides are moderately toxic to mammals. They will
kill lady beetles but do not appear to be harmful to bees. Be aware that many
commercial products contain the synergist piperonyl butoxide to enhance the
toxicity ...
Barbara W. Ellis, Fern Marshall Bradley, Helen Atthowe,
1996
2
Pesticide Residues in Food - 2001: Evaluations. Residues
Field Phase for LX 11 80-02 (Pyrethrin + Piperonyl Butoxide) Raw Agricultural
Commodity Trials on Citrus in Florida, California, Texas, and Arizona. Paragon
Global Services Study No. 18001A014. Unpublished. Hattermann, D.R. 1994b.
3
Georgis' Parasitology for Veterinarians
Pyrethrins The flower head of the pyrethrum plant Chrysanthemum
cinerariaefolium contains six closely related insecticidal substances (pyrethrin I
and II, cinerin I and II, jasmolin I and II) that are known as pyrethrins. Pyrethrins
are rapidly ...
Dwight D. Bowman, Jay R. Georgi,
2009
4
The Mode of Action of Organic Insecticides
Relation of chemical structure to toxicity- -Staudinger and Ruzicka (1924)
showed that, while the pyrethrin esters were highly toxic to certain insects, the
alcohol pyrethrolone and the two carboxylic acids in the uncom ined form were
nontoxic.
5
Small Animal Toxicology
Pyrethrins and Pyrethroids Pyrethrin is the oldest used botanical insecticide. It is
made from the dried and ground flowers of Chrysanthemum cinerariifolium (Color
Plate 20-1). Pyrethroids are synthetic derivatives of pyrethrin and are widely ...
Michael Edward Peterson, Patricia A. Talcott,
2012
6
Lewis' Dictionary of Toxicology
Robert Alan Lewis. 871 872. pyrethrin I pyridine 1roenteritis and CNS
disturbance and may include diarrhea, nausea, vomition, tinnitis, headache,
numbness of tongue and lips, syncope, hyperexc ttability, incoordination,
convulsions, ...
7
The Gardener's Guide to Common-sense Pest Control
Pyrethrin refers to the active-ingredient compounds that occur in the flowers.
Pyrethroid refers to synthetic compounds that resemble pyre- thrins in chemical
structure but are more toxic to insects. They are also far more stable in the
presence ...
8
Encyclopedia of Parasitology: A-M
Pyrethrins Important Compounds Pyrethrin I, Pyrethrin II, Cinerin I, Cinerin II,
Jasmolin I, Jasmolin II. General Information Pyrethrum comprises a mixture of
naturally occurring pyrethrins (pyrethrin I, pyrethrin II, Jasmolin I, Jasmolin II,
cinerin I, ...
9
Pesticide Residues in Food - 2000: Evaluations 2000. Part 1 ...
Field Phase for LX1 180-02 (Pyrethrin + Piperonyl Butoxide) Raw Agricultural
Commodity Trials on Citrus in Florida, California, Texas, and Arizona. (Amended)
Paragon Global Services Study No. 18001 A014 Vol. I. Unpublished. Hattermann
...
Food and Agriculture Organization of the United Nations,
2001
10
Pesticides, Man and Biosphere
Kenya, Tanzania, Tasmania and other East African countries produce about 85%
of pyrethrin for the world market. The flowers of T. cinerariifolium after flowering
contain maximum pyrethrin content and they are handpicked, dried in sun or ...
O. P. Shukla, Omkar, A. K. Kulshretha,
1998
ȘTIRI NOI CARE INCLUD TERMENUL «PYRETHRIN»
Află ce ziare naționale și internaționale au scris despre și cum este întrebuințat termenul
pyrethrin în contextul următoarelor știri.
North Platte To Begin Mosquito Fogging Next Week
Using a pyrethrin material. Pyrethrins are derived from a natural source and are widely used for mosquito control. The spray leaves no residual. North Platte ... «knopnews2, Iun 15»
Pediatricians Update Their Recommendations on Best Ways to …
One common anti-louse ingredient in over-the-counter products is pyrethrin or a combination of pyrethrins and piperonyl butoxide. Prescription products may ... «Youth Health Magzine, Iun 15»
Fruits, vegetables need special care in spring
Garden sprays that contain pyrethrin or synthetic pyrethrins are usually a good option. Do not spray plants in bloom and spray at sunrise or sunset when bees ... «Las Vegas Review-Journal, Apr 15»
Do You Know What's on Your Weed?
I found two somewhat troubling substances on the list: pyrethrins and their trusty sidekick piperonyl butoxide (PBO). Pyrethrin is listed on PAN's "bad actors" list, ... «TheStranger.com, Apr 15»
Tick-killing robot inventors open business office in Wilmington
"The ticks are pretty certain it's a creature," he says, adding that the robot then delivers a kick of a substance called pyrethrin. Ticks, attached to the skirt, absorb ... «Triangle Business Journal, Mar 15»
Gardeners, prepare to fight pests
Insecticides, including broad-spectrum, persistent materials such as pyrethroids, lower toxicity products such as oils, and botanicals such as pyrethrin or ... «Sacramento Bee, Ian 15»
January and you still have head lice!
These include the FDA-approved OTC medications containing the active ingredients permethrin and pyrethrin. The other medications in this group are still ... «Clinical Advisor, Ian 15»
[In the Field] Changes in Perimeter Pest Management
To minimize runoff and drift concerns, the U.S. EPA established the pyrethroid and pyrethrin labeling initiative. Two sections of the labels are affected ... «PCT Magazine, Oct 14»
Muggenverdelging met pyrethrin
Volgens de National Pesticide Information Center (NPIC) is pyrethrin een plantenextract. “Het inhaleren van pyrethrin kan echter wel leiden tot hoest, piepende ... «Versgeperst.com, Oct 14»
Head lice: Most-used treatments no longer very effective, scientists say
Natural pyrethrin formulations, made from chrysanthemums, were introduced in ... for the treatment failures encountered with pyrethrins- and pyrethroid-based ... «CBC.ca, Sep 14»