Insecticidal product

Details Insecticidal product Insecticidal product

1993-05-04

1997-06-24

Levy, Neil S.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

424403, 424413, 424416, A01N 2534

Patent

active

056414994

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to an insecticidal product comprising a support impregnated with an insecticidal composition, the insecticidal composition containing in each case 0.001 to 10% by weight of at least one pyrethroid, at least one UV absorbing agent and at least one anti-oxidant, and its use for controlling flying and crawling insects.
The insecticidally effective components of pyrethrum and its synthetic analogues, which are derived from the structure indicated in the following, are designated as pyrethroids. The main active substances in pyrethrum are the cinerins I and II, the pyrethrins I and II and the jasmolins I and II (Rompps Chemie-Lexikon, 8th edition (1987), page 3413).


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______________________________________ Pyrethrin I: R.sup.1 - CHCH.sub.2, R.sup.2 = CH.sub.3 Pyrethrin II: R.sup.1 = CHCH.sub.2, R.sup.2 = COOCH.sub.3 Cinerin I: R.sup.1 = R.sup.2 = CH.sub.3 Cinerin II: R.sup.1 = CH.sub.3, R.sup.2 = COOCH.sub.3 Jasmolin I: R.sup.1 = C.sub.2 H.sub.5, R.sup.2 = CH.sub.3 Jasmolin II: R.sup.1 = C.sub.2 H.sub.5, R.sup.2 = COOCH.sub.3 Allethrin: R.sup.1 = H, R.sup.2 = CH.sub.3 ______________________________________
Pyrethrum is obtained from the dried flower heads of various pyrethrum or chrysanthemum species by pulverization or extraction and contains as main active substances pyrethroids such as pyrethrins, cinerins and jasmolins. Apart from nicotine, pyrethrum is the strongest vegetable insecticide; however, its effectiveness is reduced by sunlight and heat (Rompps Chemie-Lexikon, 8th edition (1987), page 3414). The lack of stability, but also the high price of natural pyrethroids led to the development of numerous synthetic derivatives.
Pyrethroids are generally used as isomer mixtures. They have been used for a long time as insecticides, in particular against common houseflies, cockroaches or blackbeetles and other household vermin, moths, corn weevils, mosquitoes, garden and greenhouse parasites, hay worms in viticulture and boll-weevils. Particularly the natural pyrethroids distinguish themselves by a rapid so-called knock-down effect, i.e. the insects are certainly paralyzed rapidly, but only temporarily, and they recover again. The oxidative detoxication metabolism of the insects is responsible for this undesired effect.
Due to the instability of pyrethroids to light and air oxygen, UV stabilizers and antioxidants are added, as a rule, to the pyrethroid insecticides. GB-A-2 002 635 describes a rapidly evaporating, pyrethroid insecticide, which contains, in addition to a pyrethroid, at least one compound from the group consisting of phthalic acid esters, aliphatic esters, aliphatic, dibasic esters, aromatic carboxylic acid esters, higher aliphatic alcohols, alcohols with several OH groups, glycol esters and hydrocarbons with 10 or more carbon atoms and an antioxidant. Dibutyl hydroxy toluene, butyl hydroxy anisole, n-propyl gallate, tocopherol, octadecyl-3-(3,5-di-tert.-butyl-4-hydroxy phenyl) propionate, pentaerythitol tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxy phenyl) propionate], 2,5-di-tert.-butyl hydroquinone, 4,4'-thiobis-(3-methyl-6-tert.-butyl phenol) and 2,2'-methylene-bis-(4-methyl-6-tert.-butyl phenol) are mentioned. This pyrethroid insecticide can also be applied onto a porous carrier or be present in the form of a paste, a cream or granules, and it is heated to 150.degree. to 400.degree. C. by a separate heating element in order to evaporate it rapidly.
U.S. Pat. No. 3,560,613 describes an insecticidal composition of a pyrethroid, an UV absorbing agent and a long-term antioxidant. The antioxidant is either 2,6-di-tert.-butyl-4-methyl phenol or 2,6-dioctadecyl paracresol.
Insecticidal, pyrethroid-containing compositions against crawling and flying insects are customarily sprayed onto the area to be treated by means of pressurized packages or hand pumps or are put out in powder form as baits. These application forms have the disadvantage that the insecticidal composition is removed when the treated area is

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