DE885325C - Pest control - Google Patents

Description

Pest control It has been found that asymmetrical Dilialogenäthylenal) compounds of the general formula have pronounced insecticidal properties and as a result can be used with advantage for combating pests, in particular insects of all kinds, such as flies, mosquitoes, moths, beetles, lice, ants, etc., and their stages of development.

In the general formula, R and R 'are identical or different Residues of the aromatic or heterocyclic series which also contain substituents can no and Hal halogen atoms, especially chlorine atoms.

Compounds which can be used for these purposes are, for example, the a-diaryl-dichloroethylenes and their core substitution products, which are obtained smoothly from the underlying a-diaryl trichloroethanes by splitting off a mole of H Cl by means of alkali. be e.g. B. Richter - A n -schütz, Chemistry of Carbon Compounds, £ 2. Aufl., Vol. 1I, 2, p. 598, line 18. Such compounds are i, i-Diphemyl-2, 2, dichloroethylene, i, i-Di- (4-chlorophenyl) -2, 2-dichloroethylene, i , i-Di- (3, 4 - dichlorophenyl) -2, 2-dichloroethylene, i, i -Di- (2, 5-dichlorophenyl) -2, 2-dichloroethylene, i, i -Di- (nitrophenyl) - 2; 2,, dichloroethylene, i, i-di- (4-oxyphenyl) -2, 2-dichloroethylene, r, i di- (3-chloro-4-oxyphenyl) -2; 2 - dichloroethylene, i, i - di- (4-oxy-2-methyl-5-isopropylphenyl) -2, 2 @ dichloroethylene, i, i-di- (sec.-octylphenyl) -2, 2-dichloroethylene, also i-Phenyl-i, 4-chlorophenyl) -2, 2-dichloroethylene, i-tolyli- (4-chlorophenyl) -2,: 2-dichloroethylene and the like. B. the following: i, i-Di- (benzene chloroquinolyl) -2, 2-dichloroethylenes, i, i-Di- (z, 2-thienyl) -2, 2-dichloroethylene, i, i-di- (5, 5 -thiaezolyl) -2, 2-dichloroethylene and the like.

Compounds have the same or a similar effect which the radicals I2 or R 'via nitrogen or sulfur to the dichloroethylene group are bound, which also by splitting off H Cl from the corresponding trichloroethanes can be obtained: such as B. i, i-Di- (phenylamno) -2, 2-dichloroethylene, i, i-Di- (4-toluenesulfami-do) -2, 2-: dichloroethylene, i, i-Di- (4-chlorobenzenesulfami, do) @ - 2, 2-, dichloroethylene, i, i- (Di.-3, 4-d: 'ichlorbenzolsulfamido) -2, 2 - dichloroethylene, i, i-Di- (4-chlorobenzylmercapto) -2, 2-dichloroethylene and the like.

The pesticides according to the invention are used as such or in connection with liquid or solid inert carriers for use brought. They can be used, for example, in the form of solutions in organic solvents, in the form of aqueous emulsions, applied to solid pulverulent carriers, or mixed with such substances or incorporated into solid carriers. Which form is used depends on the particular practical application and the conditions of use.

You can use the means, which are almost odorless and not harmful to your health Have an effect for pest control in living rooms, storage rooms and stables use and can also use it on a large scale outdoors z. B. for extermination of plant and soil pests in horticulture and agriculture. Farther are they used to combat animal and human parasites on or in the body .the. Garments usable.

You can use these means as such, for example in the form of powder use, or mixed with or applied to carrier materials such as activated carbon, Fuller's earth, pumice stone powder, kaolin, clay, silica gel, talc, cork flour, wood flour, powdered synthetic resin or the like. In many cases the application is more liquid Shape beneficial. For this purpose one can use e.g. B. Solutions in hydrocarbons, such as gasoline, benzene, petroleum and the like, also in halogenated hydrocarbons, such as Chloroform, carbon tetrachloride, tetrachloroethane, trichlorethylene, perchlorethylene, Use dichlorobenzene and the like. Furthermore, the pesticides according to the invention can be used can also be converted into aqueous emulsions, the emulsifiers being surface-active Compounds such as anion soaps, cation soaps or electro-neutral soaps are used. Here can; one also proceeds in such a way that the means are incorporated into the solid soaps, so that they become effective when the soaps are used. In dissolved form can be the pesticides by spraying, sprinkling or soaking, e.g. B. in the treatment of textile material, bring it to use or also for disinfection or disinfestation of floors, walls, rooms. and the like.

It is also possible to use the pesticides according to the invention combine with other known pesticides to Width or increase the intensity of the effect. Example i 5 parts of i, i-Di- (4-chlorophenyl) -2, 2-dichloroethylene become intimately with 9.5 parts of talc or cork flour or sawdust mixed. The mixture can be used to powder the body or clothing as protection used against parasites, especially against lice. Also for mothballing the mixture is well suited.

Example 2 20 parts by weight of a neutralized technical oleyl alcohol sulfonate are dissolved in 75 parts by weight in tetrahydrofurfuryl alcohol. The solution is filtered. In, the solution is then dissolved in the heat from 5 to 10 parts by weight of i, i-di- (4-chlorophenyl) -2, 2 @ dichloroethylene. The solution obtained can be stirred into water produce stable aqueous emulsions, which can be reduced to a content of 1 to 3 ° / a active substance can adjust. These solutions can be used both for floor disinfection, z. B. against the carrot fly, the cabbage fly and especially against wireworms can also be used as a priming agent or spray in stables for combating the plague of flies.

Claims (1)

PATENT CLAIM: Use of asymmetrical dihaloethylene derivatives of the formula in which R and R 'are identical or different aromatic radicals. or heterocyclic series, which may also contain substituents, and Hal are halogen atoms, in particular chlorine atoms, as pesticides.