SI9200364A - Mixed agrochemical combinations - Google Patents

Abstract

Agrochemical combination. It comprises an effective amount of a benzylideneazolylmethylcycloalkane fungicide and an effective amount of imidacloprid insecticide. Application to protecting plants against diseases and insects.

Description

MIXED AGRICULTURAL MIXTURES

The present invention relates to novel agricultural plant protection compositions containing a fungicidal active substance and an insecticidal active substance at the same time, as well as to a process for treating plants with these compositions.

According to the invention, the term plant means the whole plant, part of the plant, or the plant's propagation material, especially the seed.

More particularly, the object of the invention is an agricultural crop and plant insect protection compound comprising at least one effective amount of a fungicide-free azolimethylcycloalkane and at least one effective amount of an imidacloprid insecticide.

As the fungicide benzylidene azolylmethylcycloalkane, in particular those compounds described in European patent application 0 378 953 and in particular 2- (4-chlorobenzylidene) 5,5 dimethyl 1- (1H-1,2,4-triazol-1-ylmethyl) 1 -cyclopentanol or triticonazole and 2- (4-chlorobenzylidene) 1- (1H-1,2,4-triazol-1ylmethyl) -1-cyclohexanol.

The common name for 1- (6-chloro-3-pyridylmethyl) -N-nitro-imidazoimidazolidin-2-ylidenamine is imidacloprid, whose insecticidal properties are specifically described in the Pest and diseases Brighton Crop Protection Conference report 1990, p. 21.

Compositions based on these two types of products have been found to be particularly interesting for the protection of plants against diseases and herbivores.

The preferred method is to use the mixture according to the invention for seed protection or for soil treatment.

The recommended doses of fungicide are 2.5 to 250 g per 50 kg of seeds, and the insecticide is used at a dose of 25 to 2000 g per 50 kg of seeds.

The invention also provides compositions based on each of the two active substances.

The invention further provides a method of treating plants for the protection of plants against diseases and plant-eating insects, characterized in that the mixture of the two active substances is applied either simultaneously or one after the other so as to achieve a common effect.

The following examples are given to illustrate the compositions, compositions and methods of the invention.

EXAMPLE

Wheat grains of Variety Talent were treated with:

- on the one hand, triticonazole alone, in doses of 60, 120 and 180 g of the active substance of 50 kg (g as / 50 kg),

- on the other hand, imidacloprid alone, in doses of 200 and 400 g / 50 kg,

- and finally with the mixture of triticonazole + imidacloprid, each of the active substances being in the doses indicated above.

An aqueous suspension of 200g / l triticonazole was prepared, which contained:

- 40% aqueous solution of tristyryl phenol ethoxyl in the form of potassium phosphate (dispersible) 30 g

- nonyl phenol oxyethyl with 10 moles of ethylene oxide 10 g (which can be diluted)

- Propylene glycol 50 g

- Polysaccharide (Rhodopol 23) 3 g

- 1,2-benzisothiazoline-3one (biocide) 1.5 g

- silica foam 3 g

- water up to 1000 ml

The imidacloprid composition is used commercially in aqueous suspension containing 70% of the active substance sold by the BA Bayer under the GAUCHO brand.

These two compositions were applied to the grains by treatment in a HEGE bol machine for 30 seconds.

The grains were sown in a tourbe-pouzzolane substrate (1: 1), which was 10 cm x 10 cm in pots, so that there were 10 grains in one pot (there were 4 pots per replicate).

Grains that we did not process were sown in the same conditions.

At the end of 4 weeks after sowing, the plants were inoculated with a suspension of Puccinia recondita spores and infected with the Aphis sp population.

At the end of two weeks after contamination, visual activity control was performed simultaneously against Puccinia recondita and Aphis sp., Compared to control plants with more than 100 Aphis per plant and more than 50 vesicles removed per leaf.

The results we observed are recorded in the following table:

Active substances g as / 50 kg % efficiency at Puccinia recondita % efficiency on Aphis sp Triticonazole 60 90 0 120 100 0 180 100 0 Imidacloprid 200 0 more as 90% 400 0 more as 90% Triticonazole + Imidacloprid 60 + 200 1 90 more as 90% 60 + 400 2 90 more as 90% 120 + 200 3 100 more as 90% 120 + 400 4 100 more as 90% 180 + 200 5 100 more as 90% 180 + 400 6 100 more as 90%

Otherwise, no phytotoxicity phenomenon was observed.

These results clearly show that the mixture of these two substances enables effective control of the brown wheat disease caused by Puccinia recondita and the Aphis sp.

It is clear that this experiment is not restrictive and that many other diseases and infections can be treated with the mixtures and compositions of the invention.

This example well illustrates the benefit of the compositions of the invention in that it can be combined in one and the same treatment process, especially in the case of semen, the excellent activity of two active substances, one being an insecticide and the other being a fungicide without harmful interference.

In the case of practical use, the compositions according to the invention can be used by using compositions that contain one or the other active substance or both together. In each composition, the active substances are usually combined with a carrier, solid or liquid, which can be used in agriculture and optionally with at least one surfactant.

In the practical application of the ingredient of the composition of the invention, it is rarely used alone. Most often, they are part of the compositions. These compositions, which can be used to protect plants against fungal diseases and / or against herbivores or in plant growth regulating compositions, comprise at least one constituent of the composition of the invention as an active substance, as previously described in combination with solid or liquid carriers acceptable in agriculture and / or surfactants equally acceptable in agriculture. In particular, inert and conventional carriers and conventional surfactants may be used.

These compositions typically contain between 0.5 and 95% of the composition of the invention.

For the purposes of this explanation, the term carrier means an organic or inorganic substance, natural or synthetic, with which the active substance is combined to facilitate its application to a plant, grain or soil. This carrier is therefore generally inert and must be acceptable in agriculture, especially on the treated plant. The carrier may be solid (clay, natural or synthetic silicates, silica, resins, waxes, solid fertilizers, etc.) or liquid (water, alcohols, ketones, petroleum fractions, aromatic or paraffinic hydrocarbons chlorinated hydrocarbons, liquefied gas, etc.) .

The surfactant may be an emulsifying, dispersing or wetting agent, ionic or non-ionic. For example, the salts of polyacrylic acids, salts of lignosulfonic acids, salts of phenolsulfonic or naphthalenesulfonic acids, polycondensates of ethylene oxide on fatty alcohols or fatty acids or on fatty amines, substituted phenols (especially alkyltaurates), phosphate or alcoholate esters of polyacrylic alcohols, and esters of alcohols The presence of at least one surfactant is generally necessary when the active substance and / or inert carrier is insoluble in water and is a transport agent in the application of water.

These compositions may also contain a variety of other ingredients such as protective colloids, adhesives, thickeners, thixotropic agents, penetrating agents, stabilizers, sequestrants, etc. .... as well as other active substances known for their pesticidal properties (especially insecticides and fungicides) or by properties that promote plant growth. More generally, the compositions of the invention may be combined with any solid or liquid additives that conform to conventional molding techniques.

Because of their application, the constituents of mixtures are, therefore, often in the form of compositions that are themselves in many different forms, solid or liquid.

Powdered or dispersible powders (their concentration in the mixture according to the invention can be up to 100%) and granules, in particular those obtained by extrusion, compacting, impregnation of a granular carrier, powder granulation (concentration in a mixture of the latter) cases).

The following inventions are used in these granules between 1 and 80% v

After one example of granule composition, the ingredients are:

Example G

- mixture no. 3

- epichlorohydrin

- Cetyl and polyglycol ether

- polyethylene glycol

- kaolin (granulometry: 0.3 to g

2.5 g

2.5 g

0,8 mm

910 g

In this particular case, the active substances were mixed with epichlorohydrin and dissolved in 60 g of acetone; then polyethylene glycol and cetyl and polyglycol ether were added. The kaolin was soaked in the resulting solution and then the acetone was evaporated under vacuum. Preference is given to the use of such microgranules which are used to combat soil fungi.

The ingredients of formula (I) can also be used in the form of a powder for powder; a composition containing 50 g of the active substance and 950 g of talc may also be used; we can also use a composition containing 20 g of active substance, 10 g of finely divided silica and 970 g of talc; these ingredients are mixed, ground and the mixture is applied by dusting.

Solvents, in particular water soluble concentrates, emulsifiable concentrates, emulsions, concentrated suspensions, aerosols, wettable powders (or spray powders), pastes, may be mentioned as forms of liquid compositions, or those intended to form liquid compositions during application.

Concentrates that can be emulsified or soluble contain up to a maximum of 10 to 80% of the active substance, ready-to-use emulsions or solutions contain 0.01 to 20% of the active substance.

For example, in addition to the solvent, when necessary, the emulsifiable concentrates may contain 2 to 20% of suitable additives such as stabilizers, surfactants, penetrating agents, corrosion inhibitors, colorants or the aforementioned adhesives.

As an example, the composition of some concentrates is as follows:

CE Case 1

- mixture l 400 g / l

- alkaline dodecylbenzene sulfonate 24 g / l

- nonylphenol oxyethyl with 10 ethylene oxide molecules 16 g / l

- cyclohexanone 200 g / l

- aromatic solvent up to 1 liter

According to another emulsifiable concentrate formula, we use:

CE Case 2

- a mixture of 2 250 g

- epoxidized vegetable oil 25 g

- a mixture of alkylaryl sulfonate and polyglycol ether and fatty alcohols 100 g

- dimethylformamide 50 g

- xylene 575 g

From these concentrates, emulsions of any desired concentration can be prepared by dilution with water, which are particularly suited to the application on the leaves.

Concentrated suspensions, which can equally be used by spraying, were prepared in such a way as to obtain a stable, non-storage liquid product, which typically contains from 10 to 75% of the active substance, from 0.5 to 15% of surface. of active agent, from 0 to 10% of suitable additives, such as anti-foam agents, corrosion inhibitors, stabilizers, penetrants and adhesives, and, as a carrier, water or an organic liquid in which the active substance is slightly soluble or insoluble: some solid Organic substances or inorganic salts can be dissolved in the carrier to help prevent sedimentation or to be used as anti-freezing agents.

Wettable powders (or spray powder) are typically prepared in such a way that they contain 20 to 95% of the active substance and typically also contain, in addition to the solid support, 0 to 5% of the wetting agent, 3 to 10% of the wetting agent. dispersing and, where necessary, 0 to 10% of one or more stabilizers and / or other additives, such as penetrating agents, adhesives, or clotting agents, colorants, etc.

Examples include the various compositions of wettable powders:

Example PM l

- mixture no. 3 50%

- calcium lignosulfonate (deflocculant) 5%

- isopropylnaphthalene sulfonate (anionic wetting agent) 1%

- silica (anti-clot) 5%

- kaolin (filling)

39%

The second composition of the spray powder, at 70% concentration, has the following ingredients:

Example PM 2

- mixture no. 4 700 g

- Sodium dibutylnaphthyl sulfonate 50 g

- 3/2/1 condensation product of naphthalene sulfonic acid, phenolsulfonic acid and formaldehyde 30 g

- kaolin 100 g

- Champagne chalk 120 g

The second composition of the spray powder, at a concentration of 40%, has the following ingredients:

Example PM 3

- mixture no. 5 400 g

- sodium lignosulfonate 50 g

- Sodium dibutylnaphthalene sulfonate 10 g

- silica 540 g

The second composition of the spray powder, at a concentration of 25%, has the following ingredients:

Example PM 4

- mixture no. 1 250 g

- calcium lignosulfonate 45 g

- mixture by weight of equal parts of chalk from

Champagne and hydroxyethylcellulose 19 g

- Sodium dinaphthalene sulfonate 15 g

- silica 195 g

- Champagne Chalk 195 g

- kaolin 281 g

The second composition of the spray powder, at a concentration of 25%, has the following ingredients:

Example PM 5

- mixture no. 2 250 g

- isooctylphenoxy-polyoxyethylene-ethanol 25 g

- a mixture of equal weight of Champagne chalk and hydroxyethylcellulose 17 g

- Sodium aluminosilicate 543 g

- kieselguhr 165 g

The second composition of the 10% dispersion powder has the following ingredients:

Example PM 6

- mixture no. 3 100 g

- mixture of sodium salts of sulfates of saturated fatty acids 30 g

- condensation product of naphthalene sulfonic acid and formaldehyde 50 g

- kaolin 820 g

In order to obtain these spray powders or wettable powders, the active substances with additional substances were well mixed in suitable mixers and milled in mills or other suitable crushers. In this way, spray powders are obtained which are favorable for wetting and suspending; they can be suspended in water at any desired concentration and these suspensions can be used very favorably, especially for application on plant leaves.

Pastes can be made instead of wettable powders. The conditions and methods of making and using these traps are similar to those of wettable powders or spray powders.

As stated above, dispersions and aqueous emulsions, for example compositions obtained by dilution with a water-wettable powder or emulsifiable concentrate, which are the subject of the present invention, are encompassed within the general scope of the present invention. Emulsions can be water-in-oil or oil-in-water and may have a dense consistency such as that of mayonnaise.

The doses used in the use of the compositions of the invention as fungicides may vary within wide limits, in particular fungal virulence and climatic conditions.

Claims (11)

PATENT APPLICATIONS An agricultural plant protection composition against plant diseases and herbivorous insects, characterized in that it contains at least one effective amount of the benzylidene azolylmethylcycloalkane fungicide and at least one effective amount of the imidacloprid insecticide. An agricultural composition according to claim 1, characterized in that the benzylidene azolylmethylcycloalkane fungicide is triticonazole. Composition according to one of Claims 1 and 2, characterized in that each of the active substances is a mixture with an inert carrier and optionally at least one surfactant. 4. An agricultural composition for the protection of plants against plant diseases and plant-eating insects, characterized in that it contains, mixed with an inert carrier and optionally at least one surfactant, benzylidene azolylmethylcycloalkane fungicide and the insecticide imidacloprid. An agricultural composition according to claim 4, characterized in that the benzylidene azolylmethylcycloalkane fungicide is triticonazole. 6. A process for treating plants to protect them against diseases and carnivorous insects, characterized in that an effective amount of benzylidene azolylmethylcycloalkane fungicide and an effective amount of imidacloprid are administered. Method according to claim 6, characterized in that two active substances are applied simultaneously. 8. The method of claim 7, wherein the two active substances are sequentially administered in a common manner. Method according to one of Claims 6 to 8, characterized in that at least one of the two active substances is applied during seed treatment. Method according to one of Claims 6 to 9, characterized in that at least one of the two active substances is applied during soil treatment. 11 Process after one of claims 6 to 10, marked with so, Yes triticonazole we are applying in a dose that goes from 2.5 to 250 g na 50 kg of seeds. 12 Process after one of claims 6 to 11, marked with so, Yes imidacloprid we are applying in a dose that goes from 25 to 2000 g na 50 kg of seeds. Process according to one of Claims 1 to 12, characterized in that the plant to be treated is a cereal. For RHONE-POULENC AGROCHIMIE: PATENT PSSANNA LJUBLJANA RHONE POULENC AGROCHIMIE SOCIETY Summary MIXED AGRICULTURAL MIXTURES Agricultural mixtures. They contain an effective amount of benzylidene azolylmethylcycloalkane fungicide and an effective amount of the imidacloprid insecticide. They are useful for protecting plants against diseases and insects.