NL8202039A - PESTICIDAL COMPOSITION AGAINST BUGS. - Google Patents

Description

* —'N «Γ * -1- 22531 / Vk / mb

Short designation: Pesticidal composition against insects.

The present invention relates to an anti-insect pesticidal composition. In particular, the invention relates to an insect pesticidal composition which can be effectively used against Upidoptic insects, the agent being used in a low dose.

Pyrethrolde insecticides are known and in particular are known to have a rapid lethal effect against insects that occur in homes such as flies, mosquitoes and cockroaches and these agents can also be used against insects that are soothing to agriculture such as the cabbage worra. moth with the diamond back and blade rollers. The lethal action of the pyrethrolides with natural and synthetic products is one of the strongest active substances.

However, these compounds are quite expensive compared to other commercially available organophorsfor and insecticidal insecticides. Furthermore, it is feared that a resistance to the pyrethroids can be developed in a number of insects, as has been done in other insecticides, and the insecticidal action of the pyrethroids is not sufficient to control the insect's resistance to pyrethroids. When pyrethrolde is used as a single substance, its effect is not always stable. In practical application it is desirable to combine this substance with an auxiliary substance with a residual or other effect.

On the other hand, 0,0-diisopropyl S-benzylphosphorothiolate (otherwise referred to simply as IBP) is an excellent fungicide for mildew on rice, but it is not an insecticide against agricultural insects at a practically applicable dosage.

One of the objects of the invention is to provide a pesticidal insecticide composition which has the advantages of the pyrethrile compound, but which overcomes drawbacks associated therewith. Another object of the invention is to provide a pesticidal insecticide composition which is particularly effective against lipidopteran insects.

Furthermore, according to the invention the aim is to obtain a pesticidal composition against insects which has a synergistic excellent effect against insect pests and which has a low toxicity to mammals when the agent 8202039 s -2-22531 / Vk / mb in practice is applied.

These objects according to the invention can be achieved by the use of a pesticidal composition according to the invention and it is characterized in that it contains 0.0-diisopropyl S-benzylphosphorothiolate and a pyrethrile compound of the formula 1 stated on the formula sheet, wherein X represents a hydrogen atom or fluorine atom, Y is a chlorine or boo atom and Z is a hydrogen atom or a CN group.

The pesticidal insecticide composition according to the invention contains the pyrethrile compound represented by formula 1 of the formula sheet and 0,0-diisopropyl S-benzylphosphorothiolate as active substances. Examples of the pyrethroid compounds are compounds represented by formulas 2-5 listed on the formula sheet. These pyrethroids can be used as a single substance or in combination.

In the pesticidal composition against insects according to the invention, the ratio of the pyrethrolde to IBP is within 1:10 to 10: 1, expressed in parts by weight and preferably between 2: 1 and 1: 5 · The active substances can be mixed with suitable auxiliary substances such as carriers, diluents, surfactants and dispersants to obtain useful compositions such as dust preparations, emulsifiable concentrates, wettable powders, granules, fine particles, oil preparations, aerosol, sprayable and emulsifiable concentrates and bait containing products.

Suitable carriers include solid carriers such as talc, bentonite, clay, kaolin, diatora, finely divided silica, vermiculite, calcium hydroxide, silicate, ammonium sulfate and urea, and liquid carriers such as isopropyl alcohol, xylene and cyclohexanone.

Suitable surfactants and dispersants include alkyl sulfates, alkyl sulfonates, lignin sulfonates, polyoxyethylene glycol ethers, polyoxyethylene alkyl aryl ethers and polyoxyethylene sorbane monoalkylates. Other additives include carboxymethyl cellulose, polyoxyethylene glycol and gum arabic.

The above compositions can be applied as such or after they have been diluted to an appropriate concentration. The total amount of active substances in the composition varies depending on the composition and the particular purpose of the application, but is usually between 0.05 and 90 wt.%. i.

In order to improve the stability of the pyrethrile substance against light, heat or oxidation, it is preferable to add an amount of anti-oxidant or an ultraviolet absorber such as phenol derivatives, in particular BHT (2,6-di-tert) .butyl-4-methylphenol) and BHA (butylhydroxyanisole); bisphenol derivatives and arylamines such as phenyl-QC-naphthylamine, phenyl-naphthylamine and a condensate of phenetidine and acetone; and benzophenone compounds 1 ° as stabilizers, whereby a pesticidal composition of insects with a stabilizing effect is obtained. Furthermore, it is possible to add ol-2- (2-butoxyethoxy) ethoxy] -4,5-methylenedioxy-2-propyltoluene.

It is also possible to process other active substances and preparations, such as other insecticides, fungicides and miticides, to obtain compositions with multiple and different effects.

The pesticidal insecticide composition according to the invention is a combination of a pyrethroid compound of formula 1 and IBP, which composition has a surprising synergistic pesticidal activity against insects, in particular against harmful insects that occur in agriculture such as the armyworm, ballworm, tobacco-cutting worra (Prodenia litura), the diamond spotted moth (Plutella maculipennis), the green grasshopper and the plant louse and a cutworm, harmful animals on fruit trees such as the leaf rollers, mites and moths that occur on apple trees, harmful insects that occur in the forest such as the tissue worm (Hyphantria cunea), the gypsy moth (Lymantria dispar) and borers; insects as they occur in houses, especially the fly, mosquito and cockroaches, harmful insects that occur on rice plants, such as the rice stem borer (Chilosuppressalis), the green rice leaf flea (Nephotettix cincticeps), plant flea, rice louse, rice leaf beetle, rice leaf mineworms, rice leaf rollers, rice skewers and rice leafworms, insects that occur with stored products, such as a rice worm (Sitophilus zeamais) and an Indian flour moth (Plodia inter-punctella). The pesticidal compositions according to the invention have a fast, strongly lethal and good residual effect. These very good pesticidal effects are surprising and could not be expected when using a single active agent.

The pesticidal compositions of the invention 8202 039 I-4-22531 / Vk / rab are particularly effective against lipidoteric insects such as a beetle worm, a tobacco cutworm, a diamond spine moth, a trap tissue worm, a gypsy moth, rice stem borer, rice leaf rollers and rice jumps.

The anti-insect pesticidal compositions can be prepared as follows.

Dusty preparation: active substances: 0.1 to 10% by weight, preferably 0.5 to 5% by weight.

solid support: 99% to 90% by weight, preferably 99.5 to 95% by weight.

The actives are mixed with the fine solid carrier and the mixture is crushed.

Emulsifiable concentrate: active substances: 5 to 90% by weight, preferably 20 to 70% by weight. surfactant: 1 to 40% by weight, preferably 5 to 20% by weight liquid carrier: 9 to 94% by weight, preferably 10 to 75% by weight.

The active substances are dissolved in the liquid carrier and the surfactant is added with mixing. Wettable powder: active substances: 5 to 90 wt.%, Preferably 10 to 50 wt.% Surfactant: 1 to 20 wt.%, Preferably 5 to 10 wt.% Solid support: 9 to 94 wt.% , preferably 40 to 85% by weight.

The actives are mixed with the solid carrier 30 and the surfactant, after which the mixture is crushed.

Oil-containing preparation: active substances: 0.05 to 50% by weight, preferably 0.1 to 30% by weight, liquid carrier: 99.95 to 50% by weight, preferably 99.9 to 70% by weight.

The active substances are dissolved in the liquid carrier.

8202039 ♦ * -5- 22531 / Vk / mb

Aerosol preparation: active substances: 0.1 to 10 wt.%, Preferably 0.5 to 5 wt.% liquid carrier: 99.9 to 90% by weight, preferably 99.5 to 95% by weight.

The actives are mixed with the liquid vehicle and the mixture is fed to an aerosol container and a valve is applied and propellant is forced into the container through the valve to obtain an aerosol preparation.

Fine fibers: active substances: 0.1 to 10% by weight, preferably 0.5 to 5% by weight solid support: 99.9 to 90% by weight, preferably 99.5 to 95% by weight. .

15 The active substances are mixed with the solid carrier »

If necessary, part of the solid support is added to and mixed well with a first formed mixture of the active substances and the solid support.

In the following experiments, an explanation will be given about the action against pesticides of the pesticidal compositions of the invention.

Experiment 1

Fighting the armyworm in the third larval stage.

Third-stage larvae of pyrethroids resistant to worms of the army were dipped in a solution of an emulsifiable concentrate prepared in the same manner as in Example II and with a certain concentration of actives for 5 seconds and ten these larvae were then placed in a container made of 60 cm polyvinyl chloride, containing Chinese cabbage leaves. The container was then covered and kept at a constant ambient temperature of 25 ° C. After 24 and 48 hours, the worms with which the experiment was conducted were examined and determined which survived the experiment and which were dead and the mortality percentage was calculated. The experiment was repeated twice. Similar compositions were tested in the same manner. The results obtained are shown in Table A.

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TABLE A

I | mortality percentage of active substances is unaffected after 24 l after 48 pm; hours hours. .... j ... .... ... —_________________ __________________ ____________ IBP + connection 2 '200 + 200 20 90 100 IBP + connection 3 200 + 200 20 85 90 according to the output IBP + connection 4 200 + 200 20 95 95 invention 10 IBP + compound 5 200 + 200 20 90 95 IBP + Fenvalerate * 25 200 + 200 20 5 10 IBP + Phenothrin * 3-5 200 + 200 20 45 50, c Ersun + compound 2 200 + 200 20 10 40

\ D

for connection 2 200 20 60 80 equal connection 3 200 20 65 65 appropriate connection 4 200 20 80 80 assemblies connection 5 200 20 45 60

Fenvalerate 200 20 0 5

Phenothrin 200 20 30 30 IBP 1000 20 5 5 25 Ersan * 45 1000 20 15 40 none 0 20 0 0 * 1)

Notes: Compounds 2, 3, 4 and 5 are pyrethrolides represented by formulas 2, 3, 4 and 5 on the form sheet.

* 2)

Fenvalerate is a compound shown with formula 6. * 3)

Phenonthrin is a compound represented by formula 7 listed on the formula sheet.

* 4)

Ersan is a compound represented by formula 8, reported on the formula sheet.

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0 P

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Experiment 2

The control of the armyworm in the fourth larval stage.

Fourth-stage larvae of pyrethrolde-resistant crawler army worws were immersed in a solution of a wettable powder prepared in the same manner as in Example IX and with a given concentration of actives, which was immersed for five seconds and ten these larvae were then placed in a container made of 60 cm polyvinyl chloride chloride in which a leaf of Chinese cabbage was placed. After the container was covered, it was kept at a constant temperature of 25 ° C for 24 hours, after which it was examined whether the worms were killed or were still alive and the mortality percentage was calculated. Comparative compositions were investigated in the same manner. The results obtained are shown in feabel B.

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TABLE B

active concentrations. , mortality percentages (ppm) number of WOrmen tage (?) T__ w. 200 + 200 20 95 5 IBP + compound '2 100 + 100 20 85 20 + 20 20 45 according to the ____ invention 200 + 200 20 90 IBP + compound 4 100 + 100 20 80 10 20 + 20 20 25 ττ, η 200 + 200 20 95 IBP + compound 5 100 + 100 20 80 20 + 20 20 25 _ 0.200 + 200 20 45 15 IBP + Phenorethin 100 + 100 20 30 20 + 20 20 15 IBP + Fenva- 200 2QQ 20 5 _erate____ 200 '20 80 compound 2 100 20 55 40 20 20 compound 200 20 80 compound 4 100 20 45 compositions 20 20 200 20 45 compound 5 100 20 28 40 20, 10 200 20 30 30 Phenothrin 100 20 20 40 20 15

Fenvalerate 200 20 0 IBP 1000 20 0 none 0 20 0 35 I ___ 8202039 / Μ -9- 22531 / Vk / mb

Experiment 3

The fight against the diamondback moth.

A Chinese cabbage leaf was immersed in a solution of an emulsifiable concentrate, prepared as in Example 5 VIII and with a certain concentration of actives for 10 seconds, air dried and placed in a container made of polyvinyl chloride with a content 60 cm and 10 third stage larvae of pyrethrolide resistant diamond back moths were placed in the container and kept at a constant temperature of 25 ° C for 48 hours, then the worms examined were examined to see if they were dead or alive and then the percentage was calculated. Comparative compositions were tested in the same manner. The results obtained herein are summarized in Table C.

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TABLE C

active concentrations. . mortality percentages (ppm), number of women ^ (%)

5 IBP + connection 2 ° y? + 2 ° ° 2 ° H

din * 2 40 + 40 20 75

Qlns 2 8 + 8 20 40 IBP + connection 2 ° + 2 ° 2 ° 9 °

HinD · 3 40 + 40 20 70 according to the s J 8 + 8 20 40 invention ---- 10 TT, „L. 200 + 200 20 95

IBP + connection ^ Γ Z

din * 4 40 + 40 20 65 aing 4 8 + 8 20 20 IBP + connection 200 + 200 20 95 B 40 + 40 20 80 dinS 5 8 + 8 20 50 15 TDD DV, 200 + 200 20 40 rap + r « + «* · Bo 8 + 8 20 20 IBP + Fenva- 20 ° + 290 29 ® teacher 40 + 40 20 20 teacher 8 + 8 20 0 ------- 20 ----- 200 20 69 connection 2 40 20 40 8 20 25

for comparison- ~~ ”Z

serving king. . 2

compound 3 40 20 20 25 gen 8 8 15 15 200 20 55 compound 4 40 20 45 8 20 35 200 20 60 compound 5 40 20 50 30 8 20 40 200 20 20

Phenothrin 40 20 10 8 20 5 200 20 35 - ,. Fenvalerate 40 20 10 8 20 0 none 0 20 0 8202039 "9 i -11- 22531 / Vk / mb

Experiment 4

The control of the red citrus rows (Panonychus citri). A 1¾ agar culture medium was placed in a 9 cm diameter Petri dish on which a citrus leaf was placed and 5 male adult red citrus rites were inoculated. After the 3 mites had been applied thereto, 3 cm of a solution of an emulsifiable concentrate, prepared as mentioned in example II, and sprayed with a certain concentration of active substances on it using a rotary sprayer. After the Petri dish was kept at a constant temperature of 25 ° C for 48 hours, it was examined how many mites had been killed or were still alive. The comparative compositions were tested in the same manner. The results obtained are summarized in Table D.

TABLE D

15 “Concentration mortality I corrected active ratios number of death tags (ppm) worms (%) percentage (*) '2.5 57 12.3 10.7 5 81 28.4 27.1 compound P 1Q 135 56.3 55 .5 20 (20% emulsion) 20 103 86.4 86.2 according to the 40 102 97.1 97.0 invention - - ........ ....

1.25 + 1.25 71 11.3 9.7 2.5 + 2.5 125 36.0 34.8 25 wbtadinga 5+ 5 102 61> 8 61f, 10 + 10 114 86.8 86.6 20 + 20 144 99.3 99.3

for comparison IBP (48% Z ~ 7Z 7Z

resembling deep emulsion) __ ^ ____ * ning sansnn. . 0 t ,,. none 0 167 1,8 30 | 3 counts | _____

Experiment 5

The control of red citrus mites.

A solution of an emulsifiable concentrate, prepared in the same manner as in Example II and with a certain concentration of active substances, was sprayed over a seedling of a Chinese lemon, infested with red citrus mites. The seedling was then at room temperature male adult mites were counted 8202039 -12-22531 / Vk / mb on certain days to calculate the mortality rate. Comparative compositions were tested in the same manner. The results obtained are summarized in Table E.

TABLE E

5 --r -----: compound 2 compound 2 IBP Dani cut -___ active + IBP \ ZQf> enulsion) (48 $ enulsion) (20% snuLsie) substance ^ invention ^ (comparative compositions) 100 + 100 100 500 200 0 concentration 100 + 100 100 500 200 (ppm '100 + 100 100 500 200 number »“ 33 52 11 worms for 22 30 i | 7 47 23 debehaada- 3, 27 22 56 15 15 i + ng ---------- -------- number of worms after treatment after 2 days 1 8 34 0 37 0 10 51 7 23 20 0 6 46 5 44 after 7 days 0 1 65 1 86 0 2 54 0 40 0 4 30 0 51 after 14 days 0 6 100 3 98 25 0 24 146 7 82 1 22 71 0 83 after 21 days 1 27 167 19 137 1 96 59 7 93 2 129 121 45 87 30 after 28 days 0 86 116 69 96 10 120 78 5 56 13 129 264 109 91 99.5 85.8 35.2 92.1 _ £££ «. 97 · 8 62 · 7« · »97'5 35 96, 3 52.3 0 87.4 average "" mortality per- 97.9 66.9 32.9 92.3 percentage 8202039 -13- 22531 / Vk / mb '

Experiment 6

Fighting the little tea tetor (Adoxophyes orana)

A tea leaf was immersed in a solution of a wettable powder, prepared in the same manner as in Example 5 III with a certain concentration of active substances, dried in air and placed in a container of polyvinyl chloride with a content of 60 cm and larvae of the small tea larva in the third larval stage were introduced therein. After the container was covered, the container was brought to a constant temperature of 25 ° C for 72 hours, after which it was examined how many worms had been killed and how many were still alive. Comparative compositions were tested in the same manner. The results obtained are summarized in Table F.

TABLE F

active concentrations., death percentages. .,. number of worms. , Λ substances (ppm) rate (%) 3.15 + 3.15 24 42.9 according * translation 2 6 25 + 6 25 28 62> 5 version + IBP * * 12.5 + 12.5 32 93.8 20 6.3 24 33.3 connection 2 12.5 28 71.4 for comparison 34-88.2 comparison 1 - - '.....

served IBP 100 28 0 amen- __________-------- statements none - 34 0 O 1 \ t I.

Experiment 7

The fight against the diamondback moth.

A Chinese cabbage leaf was immersed in a solution of an emulsifiable concentrate, prepared in the same manner as in Example 2 with a certain concentration of active substances, after which the leaf was air-dried and placed in a polyvinyl chloride container with a content of 60 cm, after which diamond back moths in the third larval stage were introduced therein. After the container was covered, it was kept at a constant temperature of 25 ° C for 72 hours, after which it was determined how many worms had been killed and how many were still alive. Comparative compositions were tested in the same manner. The results obtained are summarized in Table G.

8202039 '% i ί -14- 22531 / Vk / mb

TABLE G

active concentrations,, mortality (ppm) number worms centag / (ii) 0.625 ♦ 0.625 23 32.9 c according to the compound 2 1.25 + 1.25 22 42.9 invention + IBP 2.5 + 2.5 22 68.2 5 + 5 21 95.9 1.25 24 13.0, n. compound 2 2.5 21 41.7 10 for comparison 5 24 75.0 - serving ----- assembly- IBP 100 20 0 lingen ........ 1-1 ---- none 0 22 0 15 Experiment 8

The fight against the diamondback moth.

A Chinese cabbage leaf was immersed in a solution of an emulsifiable concentrate, prepared in the same manner as in Example XIII and with a certain concentration of actives for 10 seconds, air dried and placed in a container of polyvinyl chloride with a content of 60 cm, after which diamond back moths in the fourth larval stage were introduced therein and kept at a constant temperature of 25 ° C for 48 hours, after which the worms examined were determined to be still or alive and the percentage of mortality was calculated. The results obtained are summarized in Table H.

TABLE H

active Icon Centers a. . death per- ,,. number of worms.

substances (ppm) centage (ί) 30 10 + 80 30 86.7 10 + 20 30 96.7 according to the compound 2 10- + 10 30 93 3 invention * IBP '10 + 5 30 86.7 10 + 1.25 30 66.7 35 10 30 43.3 ^ Comparative _______ Compositions n,. none - 30 hours _ [_____ 8202039 «r

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In the examples, an explanation will be given regarding the preparation of the pesticidal insect repellant compositions of the invention. In the examples, the parts are parts by weight if the opposite is not stated.

5 Example I; (dust-like preparation)

2.7 parts of IBP were added to 0.3 part of 41-cis, trans acidic isomer of the compound of formula 2 and the mixture was dissolved in 20 parts of acetone. Then 97 parts of talc (50 / am) was added and the mixture was mixed well. Then acetone was removed by evaporation to obtain a dusty preparation.

Example II; (emulsifiable concentrate)

An emulsifiable concentrate was obtained by successively mixing 15 parts d, 1-cis, trans acid isomer of the compound of formula 2, 15 parts IBP, 55 parts xylene and 15 d & Len Sorpol 15 (brand name for a non-ionic surface). active agent prepared by Toho Kagaku Kogyo KK). The resulting mixture was then stirred well.

Example III: (wettable powder)

A wettable powder was obtained by mixing 20 parts of the d, l-cis, trans acid isomer of the compound of formula 2 with 20 parts of IBP, adding 5 parts of Sorpol (trade name as mentioned in Example II) and 55 parts of fine silica (silicon oxide hydrate) after which the mixture was well mixed in a mill and ingenious.

Example IV: (oil-containing preparation)

An oil-containing preparation was obtained by mixing 0.05 part d, 1-cis, trans acid isomer of the compound of formula 2 with 0.05 part IBP and the mixture was dissolved in kerosene to bring the total to 100 share.

Example V: (Aerosol preparation)

A solution of 0.2 parts d, 1-cis, trans acidic isomer of the compound of formula 2 and 2.0 parts IBP in 5 parts xylene and 7.8 parts deodorized kerosene were placed in an aerosol container. After the valve was applied to the container, the aerosol container was pressurized by adding 85 parts of propellant (liquefied petroleum gas) to obtain an aerosol formulation.

Example VI: (fine grains)

0.5 part d, 1-cis, 8202039 •>, -16-22531 / Vk / mb trans acid isomer of the compound of formula 2 and 2.0 parts IBP were absorbed into 96.5 parts of fine bentonite granules, after which the preparation was mixed using a Nauta mixer for 20 minutes. A portion of Carplex was added to the mixture and the mixture was stirred for 15 minutes to obtain fine granules.

Example VII: (dusty preparation)

To 0.3 parts d, 1-cis, trans acidic isomer of the compound of formula 3, 2.7 parts IBP was added and the mixture was dissolved in 20 parts aetone. 97 parts of talc (50 µm) tbe-10 were added to this and the mixture was stirred well. Subsequently, aetone was removed by evaporation to obtain a dusty preparation.

Example VIII: (emulsifiable concentrate)

An emulsifiable concentrate was obtained by successively mixing 15 parts d, 1-cis, trans acid isomer of the compound of formula 3, 15 parts IBP, 55 parts xylene and 15 parts Sorpol (trade name for a non-ionic surfactant prepared by Toho Kagaku Kogyo KK) and the resulting mixture was stirred.

Example IX: (wettable powder) 20 A wettable powder was obtained by mixing 20 parts d, 1-cis, transacid isomer of the compound of formula 3 and 20 parts IBP, after which 5 parts Sorpol (brand designation as mentioned in Example VIII ) and 55 parts of fine silica (silica hydrate) were added and the mixture was mixed well and ground in a mill.

Example X: (oil-containing preparation)

An oil-containing preparation was obtained by mixing 0.05 part d, 1-cis, trans acidic isomer of the compound of formula 3 with 0.05 part IBP and the mixture was dissolved in kerosene to make up the total 100 parts.

Example XI: (aerosol preparation)

A solution of 0.2 part d, 1-cis, trans acidic isomer of the compound of formula 3 and 2.0 parts IBP in 5 parts xylene and 7.8 parts deodorized kerosene was placed in an aerosol container. After a valve was mounted on the container, the aerosol container was pressurized by supplying 85 parts of propellant (liquefied petroleum gas) to obtain an aerosol formulation.

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Example XII: (fine granules)

0.5 part d, 1-cis, trans-acid isomer of the compound of formula 3 and 2.0 parts IBP were adsorbed on 96.5 parts of fine granules, after which the mixture was mixed using a Nauta mixer 5 for 20 minutes. 1 part was added to the mixture thus obtained

Carplex was added and the mixture was stirred for 15 minutes to obtain fine grains.

Example XIII: (Emulsifiable Concentrates)

In the same manner as stated In Example II, emulsifiable concentrate concentrates were prepared with compositions as listed below.

compound with IBP xylene Sorpol formula 2 (parts) (parts) (parts) (parts) a) 5 40 40 15 15 b) 10 20 60 10 c) 10 10 70 10 d) 10 5 75 10 e) 20 2.5 67.5 10 8202039

Claims (9)

Pestidal insecticide composition, characterized in that it consists of 0,0-diisopropyl-S-benzylphosphorothiolate and a pyrethrile compound of formula 1, given on the formula sheet, wherein X is a hydrogen atom or a fluorine atom, Y is a chlorine atom or bromine atom and Z represents a hydrogen atom or a CN group. 2. Pesticidal composition according to Onolusion 1, characterized in that the ratio of the pyrethrile compound and 0,0-diisopropyl S-benzylphosphorothiolate is between 1:10 to 10: 1 parts by weight. Pestidal composition according to Oololusion 1, characterized in that the ratio of the pyrethrile compound to 0,0-diisopropyl S-benzylphosphorothiolate is between 2: 1 and 1: 5. Pesticidal composition according to claims 1-3, characterized in that ala pyrethrile compound contains a compound of formula 2, mentioned on the formula sheet. Pesticidal composition according to conolusions 1-3, characterized in that the pyrethrile compound is a compound of formula 3, 20 mentioned on the formula sheet. Pesticidal composition according to claims 1-3, characterized in that the pyrethrile compound is a compound of formula 4 or a compound of formula 5 mentioned on the formula sheet. 7. Pesticidal composition according to claim 1, characterized in that the effective amount of an antioxidant or an ultraviolet absorber is incorporated herein. Pesticidal composition according to claim 1, characterized in that a carrier and a surfactant are incorporated in the composition as a diluent and a dispersant or an emulsifying agent. 9. Pesticidal composition according to claim 1, characterized in that the total active substance content is between 0.05 and 90% by weight. Eindhoven, May 1982 8202039