SK358292A3 - Agrochemical combination, agrochemical agent and method of treatment of plants - 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 agrochemical combination, agrochemical composition and method of treatment of plants

The invention relates to novel agrochemical plant protection combinations comprising both an active fungicidal and an active insecticidal agent, and a method of treating plants using said agrochemical combination.

The term plant as used herein in the specification and claims includes the entire plant, part of the plant or plant propagation material, especially seed.

In particular, the invention relates to an agrochemical combination for the protection of plants against plant diseases and plant-eating insects comprising at least an effective amount of a benzylidenazolylmethylcycloalkane fungicide and at least an effective amount of an imidacloprid insecticide.

BACKGROUND OF THE INVENTION

As the benzylidenazolylmethylcycloalkane fungicides, the fungicides described in European patent application 0,378,953 and in particular 2- (4-chlorobenzylidene) -5,5-dimethyl-1- (1H1,2,4-triazol-1-ylmethyl) -1-cyclopentanol or triticonazole are known in particular and 2- (4-chlorobenzylidene) -1- (ΐΗ-1,2,4-triazol-1-ylmethyl) -1-cyclohexanol.

Imidacloprid is the designation for 1- (6-chloro-3-pyridylmethyl) -N-nitroimidazolidin-2-ylidenamine whose insecticidal properties, especially for use against pests and plant diseases, are described in Brighton Crop Protection Conference, 1990, p. 21st

SUMMARY OF THE INVENTION

It has now been found that a blend combination ^{on the} throwing of these two product types is particularly advantageous for protecting plants against plant diseases and plant-eating insects. The blend combination of the invention can be advantageously used for seed protection or soil treatment.

The fungicide is preferably used at a dose of 2.5 to 250 g / cent (quin tal) and the insecticide is preferably used at a dose of 25 to 20 g / cent (quintal) seeds.

The invention also includes agrochemical compositions based on each of the two active ingredients.

The invention also encompasses a method of treating plants to protect plants against plant and plant-eating insects wherein the combination of both active agents is applied either concurrently or sequentially to achieve a conjugating effect.

In the following, the invention will be further elucidated by way of example of a specific embodiment thereof, but these examples are illustrative only and are not intended to limit the scope of the invention in any way.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The wheat seeds of the Talent variety are treated with:

- on the one hand, by triticonazole alone at doses of 60, 120 and 180 g of active substance per cent (g o.l / q),

- on the one hand, imidacloprid alone at doses of 200 and 400 g per cent (g o.l./q), and

- the final mixture of triticonazole + imiaacloprid, the individual active ingredients being used in the above-mentioned doses.

For this purpose, an aqueous suspension containing 200 g / l of triticonazole is prepared, containing:

- 40% aqueous solution of ethoxylated tristyrylphenol in potassium 3 phosphate form (dispersing agent)

- oxyethylenated nonylphenol containing 10 moles of ethylene oxide (wetting agent)

- propylene glycol

- polysaccharide (Rhodopol 23)

- 1,2-benzisothiazolin-3-one (biocide)

- silicone defoamer

- add water to

0 g y 50 g g 1.5 g 3 g

1000 ml.

The imidacloprid composition is used in the form of a commercial formulation consisting of a 70% aqueous suspension of the active ingredient and marketed by Company Bayer under the trade name Gaucho.

Both compositions are applied to the seeds for 30 seconds in a Hege bowl.

The seeds thus treated are then sown in a peat-pozzolanic substrate contained in 10 cm x 10 cm pots at 10 seeds per pot (4 pots for replicas).

Under the same conditions, untreated seeds are also sown.

Four weeks after sowing, the seedlings are infected with a spore suspension of Puccinia recondita and infested with Aphis sp ..

Two weeks after the contamination, a visual evaluation of the efficacy of the test compounds against Puccinia recondita and Aphis sp. Ltd. with control plants that carry more than 100 aphids / plant and more than 50 rusty perched on each leaf.

The results are shown in the following table.

table

Active substance Percent (g L./q) activity against

Puccinia recondita

Percentage activity against Aphis sp.

triticonazole

60 90 0 120 100 0 180 100 0 imidacloprid 200 0 more than 90 % 400 0 more than 90 % Triticonazole + imidacloprid no. 60 t 1 90 more than 90 % 60 + 400 2 90 more than 90 % 120 + 200 3 100 more than 90 % 120 + 400 4 100 more than 90 % 180 + 200 5 100 more than 90 % 180 + 400 6 100 more than 90 %

In addition, no phytotoxicity was observed in the test.

The results clearly show that the combination of the two materials allows effective control of wheat rust caused by Puccinia recondita spores as well as control of Aphis sp.

It is understood that this example is not limiting and that by using the combination and composition of the invention, plants can be treated to protect against many other diseases and insect species.

This example illustrates the greater effect of the agronomical combination according to the invention, in particular in that it combines, in a simple application, advantageous in the treatment of seeds, the excellent efficacy of the two active substances, one of which substances. is an insecticide and the other is a fungicide without any undesirable interference.

In practice, the agrochemical combination of the invention may be used by applying compositions containing one or the other of the active ingredients, or both. In each composition, the active ingredients are usually used in combination with a solid or liquid vehicle, which is usually used in agriculture, and optionally with at least one surfactant.

In practical applications, the components of the combination according to the invention alone are rarely used. Most often, these components form part of agrochemical compositions. These agrochemical compositions, which can be used for the protection of plants against fungal diseases and / or plant-eating insects or plant growth regulating compositions, contain as active ingredient at least one of the ingredients of the combination described above in combination with an agriculturally acceptable solid or liquid a vehicle and / or an agriculturally acceptable surfactant. Typically, conventional inert vehicles and surfactants are used in the compositions.

These compositions typically contain 0.5 to 95% of the combination of the invention.

As used herein, the term "vehicle" refers to a natural or synthetic organic or inorganic material with which the active ingredient is mixed to facilitate its application to the plant or seeds or to the soil. This vehicle is therefore usually inert and must be acceptable in agriculture and especially acceptable for the plant to be treated. The vehicle may be solid (clays, natural or synthetic silicates, silica, resins, waxes, solid fertilizers and the like) or liquid (water, alcohol, ketones, petroleum fractions, aromatic or aliphatic hydrocarbons, chlorinated hydrocarbons, liquefied gases and the like).

The surfactant may be an emulsifying agent, a dispersing agent or a wetting agent of the ionic or non-ionic type. For example, poly (acrylic acid) salts, lignosulfonic acid salts, phenolsulfonic acid salts or naphthalenesulfonic acid salts, polycondensation products of ethylene oxide with fatty alcohols or fatty acids or fatty amines, substituted phenols (especially alkylphenols or arylphenols), sulfosuccinic acid ester salts , taurine derivatives (especially alkyltaurates), phosphoric acid esters of polyoxyethylenated alcohols or phenols. The presence of at least one surface active agent is usually necessary when the active ingredient and / or the inert vehicle are not soluble in water and the carrier of the formulation is water.

These compositions may also contain all kinds of other ingredients such as protective colloids, adhesives, thickeners, thixotropic agents, penetrating agents, stabilizing agents and sequestering agents, as well as other known active ingredients having pesticidal properties (especially insecticides or fungicides) or enhancing properties. plant growth (especially fertilizers) or plant growth regulating properties. More usually, the compounds of the invention may be used in combination with any of the solid or liquid additives used in the formulation of agrochemical compositions.

Thus, in practice, the components of the combination are often in the form of compositions which in turn have different solid or liquid forms.

Powders for dusting or dispersing (containing up to 100% of the combination according to the invention) and granules, in particular granules obtained by extrusion, compression, impregnation of a granular vehicle or powder granulation (the content of the combination according to the invention in these granules is between 1) and 80% for the latter cases).

Hereinafter, an example of a granular composition comprising a combination according to the invention will be given.

Example 2

The granular composition of the invention comprises:

- combination no. 3 50 g

- epichlorohydrin 2,5 g

- cetyl polyglycol ether 2.5 g

- polyethylene glycol 35 g

- kaolin (particle size: 0.3 to 0.8 mm) 910 g.

in this specific case, the active compounds are mixed with epichloropyridine and the mixture thus obtained is dissolved in 60 g of acetone.

Polyethylene glycol and cetyl polyglycol ether are then added to the solution obtained. The solution obtained is sprayed onto kaolin and the acetone is evaporated under vacuum. The microgranules thus obtained are preferably used to control soil fungi.

The compositions of the invention may also be used in powder form for application by dusting. A composition comprising 50 g of active ingredient and 950 g of talc may also be used. It is also possible to use a composition comprising 20 g of active ingredient, 10 g of finely divided silica and 970 g of talc. The ingredients are mixed with a common seed and the resulting mixture is applied by dusting. and

As liquid forms of the compositions of the invention or as intended to form liquid compositions immediately prior to use, said solutions may be in particular water-soluble concentrates, emulsifiable concentrates, emulsions, suspension concentrates, aerosols, wettable powders (or sprayable powders) or pastes.

Emulsifiable concentrates or soluble concentrates most often contain 10 to 80% active ingredient, while ready-to-use solutions or emulsions capable of immediate application contain 0.01 to 20% active ingredient.

Emulsifiable concentrates may contain, for example, 2 to 20% of suitable additives, such as stabilizing agents, surfactants, penetrating agents, corrosion inhibitors, colorants or already zinc-coated additives, if necessary, in addition to solvents.

Two examples of concentrate formulations according to the invention will be given below.

Example 3

An emulsifiable concentrate is prepared comprising:

- combination no.1

- alkali metal dodecylbenzenesulfonate

- oxyethylenated nonylphenol containing 10 molecules of ethylene oxide

- cyclohexanone

- add flavoring solvent to

400 g / l 24 g / l 16 g / l 200 g / l

l.

Example 4

An emulsifiable concentrate is prepared comprising:

- combination no.2 250 g

- epoxidized vegetable oil 25 g

- mixture of alkylarylsulfonate and polyglycol ether and fatty alcohol 100 g

- dimethylformamide 50 g

- xylene 575 g.

By diluting these concentrates with water, it is possible to obtain emulsions of the desired concentration which are particularly suitable for foliar application.

Suspension concentrates, which can also be applied by spraying, are prepared so as to produce a stable liquid product which does not sediment, usually containing 10 to 75% of active ingredient, 0.5 to 15% of surfactants, 0.1 to% thixot 0 to 10% of suitable additives such as antifoams, corrosion inhibitors, stabilizing agents and penetrating agents, and as a vehicle water or an organic liquid in which the active ingredient is sparingly soluble or insoluble. Certain solid organic substances or inorganic salts may be dissolved in the vehicle to prevent sedimentation or freezing of water.

Wettable powders (or sprayable powders) are usually formulated to contain 20 to 95% active ingredient, the powders in addition to the active ingredient comprising a solid vehicle, 0 to 5% wetting agent, 3 to 10% dispersant and optionally 0 to 10% one or more stabilizing agents and / or other additives, such as penetrating agents, anti-settling agents, dyes, and the like.

The following are some examples of wettable powders of the present invention.

Example 5

A wettable powder is prepared comprising:

- combination no.3 50%

- calcium lignosulfonate (deflocculating agent) 5%

- Isopropylnaphthalenesulfonate (anionic wetting agent) 1%

- anti-sedimentation agent 5%

- kaolin (filler) 39%.

Example 6

A wettable powder is prepared comprising:

- combination no.4 700 g

- Sodium dibutyl naphthyl sulfonate 50 g

- condensation product of naphthalenesulfonic acid, acid / phenolsulfonic acid and formaldehyde in a ratio of 3: 2: 1 30 g

- kaolin 100 g

- chalk (Champagne) 120 g

Example 7

A wettable powder is prepared comprising:

- combination no.5

- sodium lignosulfonate

- sodium dibutylnaphthalenesulfonate

- silica

400 g 50 g 10 g

540 g

Example 8

A wettable powder is prepared comprising:

- combination no.1

- calcium lignosulfonate

- mixture of chalk (Champagne) and hydroxyethylcellulose (50:50)

- sodium dibutylnaphthalenesulfonate

- silica i

- chalk (Champagne)

- kaolin

250 g 45 g 15 g

195 g

Example 9

A wettable powder is prepared containing

- combination no.2 250 g

- isooctylphenoxypolyoxyethylenethanol 25 g

- mixture of chalk (Champagne) and hydroxyethylcellulose (50:50) 17 g

1

- sodium aluminum silicate

- diatomaceous earth

3 g 165 g.

Example 10

A wettable powder is prepared comprising:

- combination no.3 100 g

- mixture of sodium salts of saturated fatty acid sulphates 30 g

- naphthalenesulfonic acid-formaldehyde condensation product 50 g

- kaolin 820 g.

In order to obtain these sprayable powders or wettable powders, the active compounds are intimately mixed in suitable mixers with additives and the resulting mixture is ground in mills or other suitable disintegration devices. In this way, sprayable powders having advantageous wettability and suspensibility are obtained. These powders may be suspended in water at any desired concentration, and the thus obtained suspensions may be particularly advantageous, especially for application to foliage of plants.

Pastes can be prepared instead of wettable powders. The conditions and procedures for the production and use of these pastes are analogous to those for the production and use of wettable powders or sprayable powders.

As already mentioned, aqueous dispersions and emulsions, for example compositions obtained by diluting a wettable powder or an emulsifiable concentrate with water, are within the scope of the invention. These emulsions may be water-in-oil or oil-in-water emulsions and may have a dense mayonnaise-like consistency.

When the combinations according to the invention are used as fungicides, their application rates can vary within wide limits, in particular depending on the fungal virulence and the climatic conditions.

Claims (13)

PATENT N O, R O K Y What is claimed is: 1. An agrochemical combination for the protection of plants against plant diseases and plant-eating insects comprising at least an effective amount of a benzylidenazolylmethylcycloalkane fungicide and at least effective amounts of an imidacloprid insecticide. Agrochemical combination according to claim 1, characterized in that the benzylidenazolylmethylcycloalkane fungicide is triticonazole. 3. Agrochemical combination according to claim 1 or 2, characterized in that each of the active ingredients is mixed with an inert vehicle and optionally with at least one surface active agent. An agrochemical composition for protecting plants against plant diseases and plant-eating insects, comprising an agrochemical combination based on a benzylidenazolylmethylcycloalkane fungicide and an imidacloprid insecticide in combination with a diluent or carrier and optionally a surface active agent. An agrochemical composition according to claim 4, characterized in that the benzylidenazolylmethylcycloalkane fungicide is triticonazole. 6. A method of treating plants to protect against plant and insect-eating diseases, comprising administering an effective amount of a benzylidenazolylmethylcycloalkane fungicide and an effective amount of imidacloprid. A method according to claim 6, characterized in that both The active substances are administered simultaneously. Method according to claim 7, characterized in that both active substances are applied sequentially and conjugated. Method according to any one of claims 6 to 8, characterized in that at least one of the two active substances is applied to the seeds of the plants. A method according to any one of claims 6 to 9, characterized in that at least one of the two active substances is applied to the soil. 11. A method according to any one of claims 6 to 10, wherein triticonazole is applied at a dose of 2.5 to 250 g per cent of seeds. 12. A method according to any one of claims 6 to 11, wherein imidacloprid is applied at a dose of 25 to 2000 g per cent of seeds. 13. A method according to any one of claims 6 to 12, wherein the plant to be treated is a cereal.