A common formulation of pyrethrin is in preparations containing the synthetic chemical piperonyl butoxide : this has the effect of enhancing the toxicity to insects and speeding the effects when compared with pyrethrins used alone.
42.
The active ingredients are extracted with organic solvents to give a concentrate containing the six types of pyrethrins : pyrethrin I, pyrethrin II, cinerin I, cinerin II, jasmolin I, and jasmolin II.
43.
The active ingredients are extracted with organic solvents to give a concentrate containing the six types of pyrethrins : pyrethrin I, pyrethrin II, cinerin I, cinerin II, jasmolin I, and jasmolin II.
44.
The Carrs settled in the Belgian Congo in 1949, and after their divorce Rosamond settled in Mugongo, Rwanda to run a plantation growing pyrethrum flowers to produce pyrethrin, an organic insecticide sought the world over.
45.
Eradication efforts may include manual removal, clearing cultivated areas of litter, debris, and infested plants, and application of pyrethrin-containing insecticides such as Cyfluthrin or non-systemic organphosphate insectsides such as malathion.
46.
During World War II, Mr . Cole was a member of the War Chemical Board and pioneered the artificial synthesis of pyrethrin, used as an insecticide by the U . S . Navy in the South Pacific.
47.
It is the most potent knockdown pyrethroid ( even stronger than pyrethrin II ) but it is relatively unstable, especially when exposed to light ( due to both the furan ring and the thiolactone group in the molecule ).
48.
Tarnished plant bugs can sometimes be controlled with hand picking _ go out early in the morning, when they are still sluggish _ or insecticidal soap, but if the infestation is heavy you may have to resort to a pyrethrin-based insecticide.
49.
We like to see people take the less toxic approach and use a pesticide bait ( available at feed and grain stores, nurseries and discount centers, such as Wal-Mart ) or one of the botanical products available, such as pyrethrin,
50.
Application of pyrethrin ( or pyrethroid ) insecticides has been suggested'as a narcotic and a toxicant, which prevents the tick from injecting its saliva'but with this method the tick may remain physically attached for 24 hrs before it drops off dead.
