Insecticidal composition

 

(57) Abstract:

The invention relates to solid preparative forms of insecticides to control household insects. The tool according to the invention contains permethrin and karbofos or fenthion - 0.1 to 1.0 wt. % each, polietilenglikolmonostearat with 5-7 units EO - 0.5 to 1.5 wt. %, perfume and expanded or perlite filter - the rest. The tool has a greater chemical stability in comparison with the known similar and, as a consequence, a higher biological activity. 9 table.

The invention relates to solid preparative forms of insecticides to control household (synanthropic) insects. More specifically, the invention relates to a preparation containing as active ingredient a mixture of synthetic pyrethroids and organophosphorus compounds, the synthetic pirated used permethrin-3-phenoxyphenyl-3-(2,2 - dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate formula

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and as organophosphorus compounds - karbofos(Malathion)- [0,0-dimethyl-S-(1,2-diabetiker)]dithiophosphate of the formula

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or fenthion-[0,0-dimethyl-0-(3-methyl-4-mercaptophenyl)]thiophosphate formula

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It is known that the synth is whether UV radiation. Therefore, to improve the efficiency and duration of their action in the preparative form usually add synergists, the most famous of which is piperonylbutoxide, antioxidants, such as butylacetyl, tert-butylhydroquinone, butylacetamide and others , as well as substances that are absorbers of UV radiation, such as antidisestablishment and others (U.S. patent N 4668666).

To prevent decomposition of synthetic pyrethroids and increase the length of their actions use various stabilizers, such as polydimethylsiloxane, tetramethylcyclotetrasiloxane and other liquid siloxane polymers (U.S. patent N 4668666), as well as oils containing linoleic acid, tall oil and Tung oils containing conjugated double bonds (U.S. Pat. USA N 4677117).

Also has a stabilizing effect on the synthetic pyrethroids some esters of phosphoric acid (EP 0313433).

Organophosphorus components of the inventive composition also decompose under the action of acid or alkaline agents or catalysts, fillers contained in the solid preparative forms or the environment to a greater extent this applies to karbofos than the dryer is of Schildow, including karbofos, depending on the media used various additives such as ethylene glycol, propylene glycol, diethyleneglycol, triethylene glycol (U.S. patent N 2927882), ethyl silicate, thiourea (U.S. patent N 2967127), dimethylsulfoxide (U.S. patent N 3062709), low-volatile petroleum oil (U.S. patent N 3390048), polyoxyethylene amines (DE N 3103774).

In U.S. patent N 4861762 described insecticida composition based Malathion or diazinon containing as sinergeticheskoj supplements olefinic acid or its mixture with linoleic acid or Na, K, NH4-salt. The drug is used to combat leaf-eating insects.

Insecticidal compositions containing as active ingredients a mixture of synthetic pyrethroids and organophosphorus compounds are used widely, since such compositions are often more effective than formulations based on individual compounds and their use cheaper and easier. It is also found that the esters of phosphoric acids inhibit some of the enzymes that cause the metabolism of pyrethroids (EP N 0317433).

For some insect species identified synergies using the mixture of permethrin formulations based on mixtures of synthetic pyrethroids, such as cypermethrin, fenvalerate and others, and organophosphorus pesticides, including Malathion and sanitary legislature. As stabilizing agents use alkaline or alkaline earth salts of weak acids such as carbonic, acetic, silicon, phosphorus, boron, for example calcium carbonate, sodium tripolyphosphate, and others.

Closest to the invention to the technical essence and the achieved effects are insecticidal compositions based on a mixture of permethrin and karbofos (malcon) and a mixture of permethrin and sanitary legislature (bifenthrin). In addition to the active ingredients, these compositions include a filler, a solvent and a functional additive-oiling agents, stabilizers, and odorants to resolve the specific odor of organophosphorus compounds.

The following is the composition of preparative forms Farrukh Dustov malcorra and bifenthrin-II in accordance with applicable standards.

Mascord (TU 113-04-57-003-93), wt.%:

Permethrin, active substance - 0,25

Karbofos, active substance - 0,25

Isopropyl alcohol, solvent - 1,0

Odorant (to avoid the smell of karbofos) - 0,5

Polymethylsiloxane liquid or phenyl-triethylhexanoin or Mac´┐Ż-400-19175-151-95)

Permethrin, active substance - 0,5 0,05

Fenthion, active substance - 1,5 0,15

Odorant to eliminate odor - 0,5

Boric acid, the active substance and a stabilizer - 0,10 0,1

Vaseline oil, lubricant - 1,0 0,1

Talc or Telecominvest 100

Malard, bifenthrin-II effective against household insects, such as cockroaches, fleas, flies, bedbugs (Reference drugs permitted for use in medical aircraft. Under the editorship of academician of the Russian Academy of medical Sciences M., Candlesticks, Tyumen, 1995).

However, both drugs are not sufficiently stable during storage and quickly lose their insecticidal activity in connection with the decomposition of the contained active substances. So the degree of decomposition of karbofos in industrial design at natural storage for 30 days - 40 wt.%, fenthion more stable and its degree of decomposition under various conditions of storage does not exceed 8 to 9 wt.%.

Permethrin is also degraded by sunlight and other factors (see tab. 3, 4).

In accordance with the invention, increased stability and increased insecticidal activity Farrukh Dustov on the basis of a mixture of permethrin with karbofos or sanitary legislature is achieved by the 3COO(C2H4O)mH, where m = 5 or 7. These connections are conventional names Aleax-5 or Aleax-7 (TU 6-14-314-75) and are known as emulsifiers, dispersing agents, additives to detergents and cleaning compositions and to avimanyu means in the textile industry. Previously Aleax-5 and Aleax-7 as a functional addition to pesticide preparations were not used.

At the same time it is established that Aleax-5 and Aleax-7 operate more efficiently if as an inert filler to use expanded perlite or variety powder perlite filter (GOST 10832-91 and THE 21-31-44-82), derived from silicate rocks of volcanic origin by crushing and heat treatment (see N.N. Kolganov, A. N. Mutlak. Vermiculite and perlite. Moscow, 1961).

For the preparation of Farrukh Dustov use perlite grades 100 and 150 (bulk density of 150 g/DM3).

The introduction to the recipe Farrukh Dustov of Aleexa-5 or Aleexa-7 in combination with perlite instead of all members of malcorra and bifenthrin functional additives (stabilizers, oil and talc or talcomagnesite leads to increased stability of the active substances and increase the duration and efficiency which are due to the stabilizing influence of aleksov on active substances, but also as a result of the synergies arising from the joint application of Oleksa with these active ingredients. In the recipe with sanitary legislature, for example, excludes the necessity of using boric acid, which is an insecticide with long residual action to combat cockroaches.

To improve consumer properties in the insecticidal composition as the composition malcorra and bifenthrin-II, enter the odorant, representing a multicomponent mixture of synthetic aromatic substances and essential oils.

Example 1. Getting Farrukh Dustov on the basis of a mixture of permethrin and karbofos or sanitary legislature.

At a temperature of 35 - 40oC are mixed in a predetermined mass ratio of Aleax-5 or Aleax-7, karbofos or fenthion, odorant and preheated to a temperature of 45 - 50oC permethrin. The mixture of active substances and functional additives (in a given mass ratio) with mechanical injectors put on expanded perlite perlite or sand filter. The process is carried out in a paddle mixer at a temperature of 35 - 40oC.

The thus obtained compositions combined Farrukh Dustov on the following basis:

permethrin and karbofos - D-1, D-is it a sample SF-4 (without Aleexa-7).

Similarly the obtained compounds D-5, SF-5, containing Aleax-5 and OLEDs-7, as well as talc and Telecominvest as fillers.

Included in these compositions the components and their relationship are shown in table. 1 and 2.

Properties of the obtained compositions, the stability of active substances in natural and artificial storage, the degree of decomposition under the action of UV light in comparison with samples D-4, D-5 and SF-4, SF-5, and samples Farrukh Dustov malard, bifenthrin-II are given in table. 3 and 4.

As can be seen from the table. 3 and 4, the proposed formulations are stable during storage and under the action of UV light, which is achieved by the introduction of the formulations of Aleexa-5 or Aleexa-7 and inert filler - sand perlite expanded or filtrability.

Example 2. Determination of insecticidal activity Farrukh Dustov based on the combination of permethrin and karbofos (or sanitary legislature in the fight against red cockroaches.

Biological activity Farrukh Dustov was studied in red cockroaches (BI. germanica) insertimage breeding Niepce. The method of forced contact is defined acute insecticidal activity Farrukh Dustov and their residual effect.

On the surface of the plywood in the size 10 x 20 cm evenly nanaina within 30 seconds In the experiment used 30 insects. At the same time put the control experiments, which used pure filler-sand perlite expanded and talc in the evaluation of insecticidal action Farrukh Dustov malard, bifenthrin. Each experiment was conducted in a 5-fold repetition when the air temperature is 23 2oC and relative humidity of 60 5%.

After contacting insects transported in clean containers with food and water. Analysis was performed 15 minutes after contact and determined the percentage of death.

Study duration insecticidal action Farrukh Dustov spent on plywood surfaces size 10 x 20 cm Surface was treated with minimal doses Farrukh Dustov, which in the determination of acute toxicity were provided 100% mortality of cockroaches after 15 minutes after 30 seconds contact. The treated plates were kept indoors at room temperature in a horizontal position with diffused light. Cockroaches in contact with the processed bustami surfaces for the first time within 24 hours after application of dust, then after 5 days and then once every 5 days until the deadline, when the number of dead cockroaches will be less than 50%. Contact insects proveen same places, where cockroaches previously had no contact. Analysis was performed after 24 hours of contact.

Acute insecticidal activity and residual activity Farrukh Dustov based on the combination of permethrin and karbofos, permethrin and sanitary legislature, reference samples, Farrukh Dustov malard, bifenthrin against common cockroaches are given in table. 5, 6, 7, 8.

The study of acute insecticidal activity Farrukh Dustov based on the combination of permethrin and karbofos, permethrin and sanitary legislature regarding red cockroaches (see tab. 5 and 7) showed that the dust formulation containing Aleax-5 or Aleax-7 (compositions: D-1, D-2, D-3 and SF-1, SF-2, SF-3) is significantly more effective Farrukh Dustov D-4 and SF-4, does not contain the above components, and known Farrukh Dustov malard, bifenthrin-II.

The same results are observed when examining the residual insecticidal action of the claimed compounds against red cockroaches (see tab. 6 and 8) even at lower consumption rates by the amount of D. C. 1 m2than the standards and dusty malard, bifenthrin-II.

Example 3. Determination of insecticidal activity Farrukh Dustov on the rat flea (Xenopsylla cheopis) and bed bugs (Cimex lectulavius) insertimage breeding Niepce.

Samples unpainted and 1.0 g/m2.

Contacting insects was carried out for 30 seconds and 5 minutes Experience staged simultaneously in three surfaces. In each repetition of the experience used 30 insects. Each experience was accompanied by a control in three replications.

After contacting insects was transferred into a clean vessels: bed bugs in a test tube with a filter paper in the form of an accordion, fleas were transplanted into glasses with sand, the top of which was tied around the napkins soaked with water.

Experiments were performed at temperature 21 2oC and relative humidity of 66 3%. The results were recorded after 24 hours. When taking into account the results of the experiment were counting the number of live, paralyzed and dead insects. Insects in the experiment was calculated in percentage with respect to control.

The results of the determination of insecticidal activity Farrukh Dustov in respect of rat fleas are shown in tables 7 and 9.

From the above results show that dusty containing Aleax-5 or Aleax-7 (compositions: D-1, D-2, D-3, and SF-1, SF-2, SF-3), is significantly more effective Farrukh Dustov D-4 and SF-4, does not contain the above components, and known Farrukh Dustov malard, bifenthrin-II.

Insecticidal sosauce, the inert carrier, a flavoring, characterized in that the functional additives it contains polietilenglikolmonostearat formula

C17H33COO(C2H4O)mH,

where m = 5 and/or 7 (Aleax 5 or Aleax 7),

and as the inert carrier is expanded perlite or perlite powder filter in the following ratio, wt.%:

Permethrin - 0,1 - 1,0

Karbofos or fenthion - 0,1 - 1,0

Polietilenglikolmonostearat - 0,5 - 1,5

Odorant - 0,2 - 0,8

The expanded perlite or perlite powder filter - Up to 100C

 

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