DE2617120A1 - PROCEDURES FOR THE PROTECTION OF PLANTS - Google Patents

Description

FROM KREISLER SCHÖNWALD MEYER EISHOLD FUES FROM KREISLER KELLER SELTING

PATENT LAWYERS Dr.-Ing. by Kreisler f 1973

Dr.-Ing. K. Schönwald, Cologne Dr.-Ing. Th. Meyer, Cologne Dr.-Ing. K. W. Eishold, Bad Soden Dr. J. F. Fues, Cologne Dipl.-Chem. Alek von Kreisler, Cologne Dipl.-Chem. Carola Keller, Cologne Dipl.-Ing. G. Selting, Cologne

. . Fu / Ax

5 Cologne, April 15, 1976

DEICHMANNHAUS AT THE MAIN RAILWAY STATION The British Petroleum Company Limited,

Britannic House, Moor Lane, London, EC2Y 3BU (Engla nd).

Process for the protection of plants

The invention relates to the use of pesticides, whose effect is based on the fact that it is absorbed through the roots of the plants to be treated will.

Pesticides, the action of which is based on absorption by the roots of the plants, are known. It can be herbicides that kill the plant, or insecticides and fungicides that kill the plant Protect the plant against external destructive influences. Pesticides that become effective through absorption into the plants are well known as systemic pesticides and are commonly used in Applied in the form of aqueous suspensions or solutions. Pesticides that are specially designed by penetration effective in the roots of germinating plants are known as pre-emergence agents.

It has been found that the effectiveness of pre-emergence pesticides by the presence of a

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T »! Efon: (02 21) 234541-4 · Tilcx: 8882307 dopa d ■ Telegram: Dompalent Cologne

Hydrocarbon oil is increased. ^ '' '

It is known that the addition of mineral oil will tend to sys. see Herbicides that work by the herbicide penetrating through the foliage of weeds, the weed-killing ones Properties increased. It is also known from GB-PS 1 420 6ü5 and 1 421 740 that by Addition of mineral oil to the aqueous suspension of systemic fungicides and insecticides improved results can be obtained when the emulsions thus formed are used to treat growing plants. It is to be regarded as surprising, however, that by adding a mineral oil to a herbicide that by the roots of a Penetrates the plant, its effectiveness can be increased, since the organization and functions of foliar and root tissue fundamentally different and the ability to absorb fluids and the type of ingested Liquid are very different.

The applicant's British patent application 2404/74 describes a method for growing useful plants the weeds that emerge above the ground before and after the crop plants emerge with a herbicidal agent Preparation to be sprayed that contains a herbicide and a petroleum, the same herbicide for spraying before and used after the crop has emerged above the ground. It has now been further found that mineral oils the effectiveness of pre-emergence fungicides and pre-emergence insecticides and that in the case of pre-emergence herbicides it is possible to do any post-emergence treatment to avoid.

The invention relates to the protection of plants by a method which is characterized in that the soil from which the plants will emerge later with an emulsion of water, a systemic pre-emergence pesticide and a mineral oil that has a viscosity of 1 to 50 cSt at 37 ° C.

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Herbicides, fungicides and insecticides can be used as pesticides. As examples of suitable pesticides are mentioned:

Common name

Chemical name

trademark

Herbicidal Atrazine Chlorpropham Ethofumesate

Lenacil

Linuron
Pyrazone
Metamitron

Fungicides benomyl

Carboxin oxycarboxin

Chloraniformethane

Dimethirimol Carbendazim ethirimol

2-chloro-4-ethylamino-6-iso-Gesaprim propylamino-1,3,5-triazine

Isopropyl N- (3-chlorophenyl) carbamate

2-ethoxy-2,3-dihydro-3,3-nortron

dimethylbenzofuran-5-yl-

methyl sulfonate

3-Cyclohexyl-6,7-dihydro-Venzar 1H-cyclopentapyrimidine-2,4- (3H, 5H) -dione

3- (3,4-dichlorophenyl) -1-Lorox methoxy-1-methylurea

5-amino-4-chloro-2-phenyl-pyramine 3-pyridazone

4-amino-4,5-dihydro-3-Goltix methyl 1-6-phenyl-1,2,4-triazin-5-one

Methyl N - / ^ (1-butylcarbbenlate

amoyl) -2-benzimidazole _: 7-

carbamate

2,3-dihydro-6-methy1-5-Vi tavax

phenyl-carbamoyl-1,4-

oxathiin

2, S-dihydro-G-methyl-S-Plantvax phenyl-carbamoyl-1,4-oxathiine-4,4-dioxide

1- (3,4-dichloroanilino) -1-miIfaron

formylamino-2,2,2-tri-

chloroethane

5-n -Butyl-2-dimethylamino Milcurb 4-hydroxy-6-methylpyrimidine

Methylbenz imidazol-2-y1-carbamate

Bavistan

5-n-butyl-2-ethylamino-Milstem / Milgo 4-hydroxy-6-methylpyrimidine

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Common chemical name Trademark name

Thiabendazole 2- (4'-thiazolyl) benzimilecto 60 / yo

dazol

insecticides

Üimethoate Dimethyl-S- (N-methylcarbamoyl- Kogor methyl) phosphorothiolothionate

S- or 0- (ethylthio) ethyl metasystox

Demeton-O-methyl

Uemeton-S-

dimethy! phosphorothiolate

methyl

Ethoate-Methyl S- (N-Ethylcarbamoylmethyl- Fitios

dimethyl phosphorothiolothionate

Phorate Diethyl-S- (ethylthiomethyl) - Thimet phosphorodithionate

Pirimicarb 2-dimethylamino-5,6-pirimor

dimethylpyrimidin-4-y1-dimethylcaroamate

The mineral oil preferably has a viscosity of 10 to 40 cSt at 37 ^° C. and an aromatic content of not more than 20%, measured on the non-sulphonable residue according to ASTM method D4 83. Light lubricating oils are suitable as mineral oils.

In order to facilitate the formation of an emulsion, the oil preferably contains one or more emulsifiers, in particular non-ionic emulsifiers, e.g. ethoxylated alcohols and phenols and ethoxylated esters of carboxylic acids. Mixtures of a lipophilic and a hydrophilic emulsifier are preferably used. The oil preferably contains 0.1 to 15% by weight, in particular 1 to 5% by weight, of emulsifier.

Emulsions can be added by adding an emulsifiable oil an aqueous dispersion of the pesticide, by adding a prepared mixture of oil and Pesticides to water with formation of an aqueous emulsion or by adding the pest

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control agent to form an oil-in-water emulsion. i

The emulsion preferably contains 0.1 to 10% by volume,
preferably 0.5 to 5% by volume of oil, based on the total volume of the dispersion.

The amount of pesticide in the i

Emulsion can be 0.01 to 10 wt .-%, preferably 0.1 to ^;

1 wt .-%, based on the weight of the total preparation, ι be.

According to the invention, the emulsion should be

running the plants above the ground, i but it can also be used before or after sowing j. However, it is preferably distributed after sowing. For large-scale use, the
Emulsions are sprayed on the floor. The application rate can be 50 to 1000 l / ha and is in particular 100 to 300 l / ha. ι

The invention is further illustrated by the following examples. ^:

ι Example 1 '■

10 mustard seeds were put 1 cm deep in compost.

puts. Before the seedlings emerged, various | dene parts of the soil surface at an application rate of 250 l / ha with aqueous suspensions of 3- (3,4-di-! chlorophenyD-l-methoxy-l-methylurea (Linuron)
(0.5 kg active ingredient / ha ') sprayed with and without 5 l mineral oil / ha. The oil had a viscosity of 35 cSt
37 ° C and contained 3% by weight (based on the oil) of one
Emulsifier. Two weeks after the emergence they were
the following percentages of plants died:
0.5 kg active ingredient / ha in water 9%

0.5 kg active ingredient / ha in oil-in-water emulsion 53%

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These results show the significant increase in effectiveness that the addition of the oil allows! an aqueous herbicide preparation used as a pre-emergence agent is achieved.

Example 2 '·

The experiment described in Example 1 was repeated using Z-chloro-A-ethylamino-G-isopropylamino-1,3,5-triazine (atrazine) as the herbicide. The following percentages of the plants had died: '0.625 kg active ingredient / ha in water 42% \

0.625 kg active ingredient / ha in oil-in-water emulsion 90% j

i Example 3

The experiment described in Example 1 was repeated using 2-ethoxy-2,3-dihydro-3,3-dimethylbenzofuran-5-ylmethylsulfonate (ethofumesate) as the herbicide at an application rate of 2 kg / ha. Two weeks: after emergence, the damage to the mustard plants was assessed visually on a scale from 0 (unaffected) to 5 (dead). The following results were \

received: '.

i Degree of damage |

2 kg active ingredient / ha in water 2.2 j

2 kg active ingredient / ha in oil-in-water emulsion 4.0

Example 4

Barley seeds were sown in oven-dried compost (zero moisture content). Different parts of the Composts were made with suspensions of methyl-N- / Tl-butyl

_ ι

carbamoyD-2-benzimidazo ^ / carbamate (benomyl) in water | treated, part with the simple suspension! and another part with an emulsion of the 1% by volume of the suspension containing mineral oil plus emulsifier was treated according to Example 1. Both parts

were completely soaked in the liquid. To ;

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complete soaking was the active ingredient content of the Compost 10 parts by weight per million parts by weight.

The plants were allowed to grow until they had 1 to 2 leaves, after which parts of the first leaf were analyzed to determine the active ingredient content. The mean content of active substance in five determinations was 0.045 ug in the case of aqueous suspension and 0.113 ug in the case of oil-in-water emulsion. This corresponds to a threefold increase in active ingredient intake.

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Claims (8)

Claims A method for protecting plants, characterized in that the soil from which the plants later emerge is treated with an emulsion of water, a systemic pre-emergence pesticide and a mineral oil which has a viscosity of 1 to 50 cSt at 37 ° C , treated. ^; 2) Method according to claim 1, characterized in that: a mineral oil with a viscosity of 10 to 40 cSt. at 37 ° C and an aromatic content of no more than 20% used. j 3) Method according to claim 1 or 2, characterized in that the Cl 0.1 to 15 wt .-% (based on the oil) one or more non-ionic emulsifiers are added. 4) method according to claim 1 to 3, characterized in that an emulsion is used which contains 0.1 to 10 vol .- / 6 '< oil, preferably 0.5 to 5 vol .-% oil. 5) Process according to claim 1 to 4, characterized in that an emulsion is used which contains 0.01 to 10% by weight Contains pesticides, based on the weight of the total preparation. 6) Method according to claim 1 to 5, characterized in that the soil is treated after sowing the seeds. 7) Method according to claim 1 to 6, characterized by that the soil with an application rate of 50 to; 1000 l / ha treated. 8) Method according to claim 1 to 7, characterized in that, that a herbicide, fungicide or insecticide is used as a pesticide. 609845/0731