# US 4,397,859 A · Insecticide

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- Number: US 4,397,859 A
- Document ID: US4397859A
- Status: Granted
- Kind: A
- Application number: 06/261,134
- Filed: 1981-05-04
- Granted: 1983-08-09
- Earliest claimed: 1972-02-25
- Assignees: Fisons Limited
- Inventors: Quinton A. Geering
- Web page: https://patentgrep.com/patent/US4397859A

## CPC

- A01N 53/00: Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

An insecticidal composition particularly valuable for use indoors, e.g. against cockroaches, comprises: (A) 2,2-dimethyl-1,3-benzodioxol-4-yl H-methylcarbamate; and (b) pyrethrin.

## Claims

### Claim 1

A synergistic insecticidal composition consisting essentially of:
(A) 2,2-dimethyl-1,3-benzodioxol-4-yl N-methylcarbamate, and
(B) a pyrethrin selected from the group consisting of natural pyrethrin, resmethrin, tetramethrin and bioresmethrin, said natural pyrethrin comprising a mixture of pyrethrins I and II, cinerins I and II and jasmolins I and II; wherein the proportion of (A) to (B) is from 10:1 to 1:1 by weight.

### Claim 2 (depends on 1)

The composition according to claim 1, wherein (B) is natural pyrethrin.

### Claim 3 (depends on 1)

The composition according to claim 1 which contains 2,2-dichlorovinyl dimethyl phosphate.

### Claim 4 (depends on 3)

The composition according to claim 3, wherein the proportion of (A) to 2,2-dichlorovinyl dimethyl phosphate is from 1:50 to 20:1 by weight.

### Claim 5 (depends on 1)

The composition according to claim 1 which additionally contains piperonyl butoxide as a synergist for (B).

### Claim 6

A method of combatting insects at a locus to be protected from them, which method comprises applying to the locus an insecticidally effective amount of a synergistic insecticidal composition consisting essentially of:
(A) 2,2-dimethyl-1,3-benzodioxol-4-yl N-methylcarbamate, and
(B) a pyrethrin selected from the group consisting of natural pyrethrin, resmethrin, tetramethrin and bioresmethrin, said natural pyrethrin comprising a mixture of pyrethrin I and II, cinerins I and II and jasmolins I and II; wherein the proportion of (A) to (B) is from 10:1 to 1:1 by weight.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the composition is applied indoors.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the composition is applied in the amount of 10-1,000 mg of component (A) per square meter.