DE1145421B - Preparations for the control of insects - Google Patents

Description

It is known that the a-naphthyl ester of N-methylcarbamic acid has insecticidal properties.

It is also known that mixtures of said ester and piperonyl butoxide (3,4-methylenedioxy-6-propylbenzylbutyl diethylene glycol ether), Sesoxane (2- (3,4-methylenedioxyphenoxy) -3,6,9-trioxaundecane) or sulfoxide (N-octylsulfoxide of isosafrole) have a better insecticidal effect than the ester alone. When applying these mixtures will the time between the treatment of the insect and the onset of action compared to the application of the Esters only slightly shortened.

It has now been found that a mixture of the oc-naphthyl ester of N-methylcarbamic acid and the 2,3,3,3,2 ', 3', 3 ', 3'-octachlorodipropyl ether has a good insecticidal effect, with the onset of action occurs much faster than with the ester alone. This rapid onset of action is in the fight from insects, for example houseflies, an advantage because the success is visible after a short time is, while an onset of action easily fakes a failure after a long time. In addition, the annoyance or damage associated with the presence of the insects will end more quickly. Further the risk of the insects being removed from the area of action of the insecticidal agent is avoided and recover outside of this area. The application of the invention to The mixture used is carried out in the customary manner. For example, after adding liquid solvents can be used for filling aerosol cans. It is also possible through Adding solid, finely powdered inert substances to produce dust.

The use of 2,3,3,3,2 ', 3', 3 ', 3'-octachlorodipropyl ether the formula

CCl ₃ - CHCl - CH ₂ - O - CH ₂ - CHCl - CCl ₃

as a synergist for insecticides, especially for insecticides from the class of pyrethrins and Rotenones known. This, however, has the beneficial effect of a mixture of this ether with the oc-naphthyl ester not suggested to N-methylcarbamic acid. The following example shows the good insecticides Effect of the mixture according to the invention.

example

The active ingredients or active ingredient mixtures listed in the table below were dissolved in acetone solved. Of this solution, 0.4 ecm was used twice for each experiment. As laboratory animals Houseflies (Musca domestica) were used in means of controlling insects

Applicant:

Aniline & Soda Factory in Baden
Aktiengesellschaft, Ludwigshafen / Rhein

Dr. Heinrich Adolphi, Limburgerhof (Palatinate),
Dr. Herbert Stummeyer, Mannheim,

Dr. Friedrich Becke, Heidelberg,

and Dr. Heinrich Sperber, Ludwigshafen / Rhine,

have been named as inventors

Kearns-March chambers sprayed with the test solution became. The test temperature was 22 ° C. In these tests, the time was determined which elapses until 50% of the houseflies are in the supine position on the floor of the chambers (LT 50).

The following active ingredients were used for the experiments:

(I) δ-naphthyl ester of N-methylcarbamic acid.

(II) piperonyl butoxide.

(III) octachlorodipropyl ether.

Active ingredient concentration
in the acetone solution

(Di ⁰ A,

(1) 0.5% + (111) 0.5%.
(I) 0.25% + (III) 0.25%
(1) 0.5% + (11) 0.5%.
(1) 0.25% + (11) 0.25%

LT 50
in minutes

285
100
145
165
195

The results show that the onset of the insecticidal effect of the oc-naphthyl ester of N-methylcarbamic acid is accelerated extraordinarily by the addition of octachlorodipropyl ether.

The active ingredients listed in the table below or mixtures of active ingredients were dissolved in methanol. Of this solution, 0.4 ecm were each twice for used every attempt. House flies (Musca domestica) in Kearns-March chambers were used as experimental animals were sprayed with the test solution. The test temperature was 22 ° C. In the The following table shows the percentage of flies that moved after different time intervals, from the time of treatment, lie in the supine position.

309 539/410

The following active ingredients were used for the experiments:

(Γ) o-Naphthyl ester of N-methylcarbamic acid. (Π) piperonyl butoxide.
(ill) octachlorodipropyl ether.
(IV) sesoxane.

The results show that the onset of the insecticidal effect of the α-naphthyl ester of N-methylcarbamic acid is extraordinarily accelerated by the addition of Octachlorodipropyläthers and that this mixture has a better insecticidal effect than the known mixtures.

Time after
treatment
in minutes

20th

40

90

180

Active ingredient concentration in the methanolic solution

12%

I 0.5%
ΙΠ 0.5%

I 0.25% 1110.25%

I 0.5% IV 0.5%

10.5%

+ Π 0.5%

Percentage of animals lying on their backs

0 4th 0.4 0 0.2 22nd 5 2 5 67 24 34 35 98 71 79 44 99 75 90

0 3

28 74

Claims (1)

PATENT CLAIM: Agent for combating insects, characterized by a content of the a-naphthyl ester of N-methylcarbamic acid and the 2,3,3,3, 2 ', 3', 3 ', 3'-octachlorodipropyl ether. Considered publications:
U.S. Patent Nos. 2,904463, 2,904,464, 2,904,465. ι 309 539/410 3.63