FR2784011A1 - Insecticidal compositions contain pyrethroid and chloronicotinyl insecticide, for the treatment of cotton plants - Google Patents

Abstract

Insecticidal compositions containing a pyrethroid (I) and a chloronicotinyl insecticide (II) such as imidacloprid, acetamiprid, or nitenpyram.

Description

A insecticidal composition comprising cypermethrin and

  acetamiprid. The subject of the present invention is an insecticidal composition comprising a pyrethroid type compound and a method using said composition and intended to protect, as a curative or preventive, the

  crops against insect attack.

  For the purposes of the present invention, the term "plant" means an entire plant, a part of the plant or the propagation material of the plant,

  especially the seed, a genetically modified plant (GMO), etc.

  All kinds of insecticidal compositions based on pyrethroids are known. Despite all the existing compositions, the fight against cotton pests, and especially against the heliothis parasite, remains a difficult problem requiring large quantities of insecticides. It is desirable for all kinds of reasons, especially for the protection

  of the environment, to lower the doses of insecticides to be used.

  An object of the present invention is to provide compositions

  active insecticides, especially on cotton pests.

  Another object of the present invention is to provide compositions

high-activity insecticides.

  Another object of the present invention is to provide insecticidal compositions which make it possible to reduce the doses used, in particular a reduction in the doses of the constituents compared to those used.

  when these constituents are used alone.

  Another object of the present invention is to provide compositions

synergistic insecticides.

  Another object of the present invention is to provide insecticidal compositions with reduced risks as to the appearance of resistances.

vis-à-vis insects.

  It has now been found that one (or more) of the above objectives can be achieved through the insecticidal composition according to the

present invention.

  The subject of the present invention is therefore an insecticidal composition comprising a pyrethroid compound, preferably cypermethrin, and an insecticide of the chloronicotinyl family such as imidacloprid, acetarniprid or nitcnpyram. Acetamiprid is a preferred compound in the

of the present invention.

  The subject of the present invention is therefore an insecticidal composition

  comprising cypermethrin and acetamiprid.

  The present invention further relates to an insecticidal composition comprising cypermethrin, triazophos and acetamiprid. The present invention further relates to an insecticidal composition comprising cypermethrin, triazophos and acetamiprid.

in synergistic proportions.

  In what follows, the various percentages indicated are

  percentages by weight, unless otherwise indicated.

  The present invention further relates to an insecticidal composition comprising cypermethrin, triazophos and acetamiprid in a proportion of: 40% cypermethrin, preferably 10 to 20%, 90% triazophos, preferably 70% at 80%, 1 to 10% of acetamiprid, preferably 2 to 5%, these various percentages being percentages by weight relative to all the

insecticidal active ingredients.

  Cypermethrin and triazophos are insecticidal active ingredients well known in the literature, as regards their formula, their

  method of preparation and their physicochemical properties.

  Imidacloprid is the common name for 1- (6-chloro-3-

  pyridylmethyl) -N-nitro-imidazolidin-2-ylideneamine described for its insecticidal properties especially in the reports "Pests and

  diseases "Brighton Crop Protection Conference 1990, p.2 1.

  Nitenpyram is the common name for (E) -N - ((6-chloro-3-

  pyridyl) methyl) -N-ethyl-N'-methyl-2-nitrovinylidenediamine. This product is listed in the Pesticide Manual (eleventh edition) edited by Clive

  TOMLIN and published by the British Crop Protection Council, 1997.

  Acetamiprid is the common name for (E) -N] - ((6-chloro-3-

  pyridyl) methyl) -N2-cyano-N1-methylacetamidine. This product is listed in the NIanual Pesticide (Eleventh Edition 1997). It was first disclosed in International Application PCT'.IP90, 01282 published under number WO 91/04965. Subsequently, other properties of this compound have been described in International Application PCTTEP93 / 01286 published under the

number WO 93/24004.

  The insecticidal compositions according to the invention comprise the active materials indicated above as well as solid or liquid supports, acceptable in agriculture and surfactants also acceptable in agriculture. In particular, the usual inert carriers and surfactants are usable. These compositions cover not only the compositions ready to be applied to the crop to be treated by means of a suitable device, such as a spraying device, but also the commercial concentrated compositions which must be diluted before application to the crop. In particular, abbreviated La X> Active Insecticidal Material is the combination of the two or three active ingredients

  cypermethrin and acetamiprid and triazophos.

  The compositions of the invention may also contain any kind of other ingredients such as, for example, protective colloids, adhesives. thickeners, thixotropic agents, penetrating agents, stabilizers, sequestering agents, etc. More generally Active material can be combined with all the solid or liquid additives corresponding to the

  usual techniques of formulation.

  In general, the compositions according to the invention usually contain from 0.05 to 95% (by weight) of active material, one or more solid or liquid carriers and, optionally, one or more surfactants. By the term "carrier", in the present description, is meant an organic or inorganic material, natural or synthetic, with which the Active Matter is combined to facilitate its application to the aerial parts of the plant. This support is therefore generally inert and must be acceptable in agriculture, especially on the treated plant. The support can be solid (clays, natural or synthetic silicates, silica, resins, waxes,

  solid fertilizers, etc.) or liquid (water, alcohols, especially butanol, etc.).

  surfactant may be an agent, emulsifier, dispersant or wetting agent of ionic or nonionic type or a mixture of such surfactants. There may be mentioned, for example, polyacrylic acid salts, lignosulfonic acid salts, phenolsulphonic or naphthalenesulphonic acid salts, polycondensates of ethylene oxide with fatty alcohols or with fatty acids or with fatty amines. substituted phenols (especially alkylphenols or arylphenols), salts of sulfosuccinic acid esters, taurine derivatives (especially alkyltaurates), phosphoric esters of polyoxyethylated alcohols or phenols, acid esters and polyols, sulfates, sulfonates and phosphates-based derivatives of the foregoing compounds. The presence of at least one surfactant is generally indispensable when the Active Material and / or the inert carrier are not soluble in water and the carrier agent is

the application is water.

  Thus, the compositions for agricultural use according to the invention may contain the Active Material within very wide limits, ranging from 0.05% to 95% (by weight). Their content of surfactant is advantageously

  between 5% and 40% by weight.

  These compositions according to the invention are themselves under

  0 quite diverse forms, solid or liquid.

  As forms of solid compositions, mention may be made of granules, in particular those obtained by extrusion, by compacting, by impregnation of a granulated support, by granulation from a powder (the content of active material in these granules being between 0, 5 and 80% for these

  case), effervescent tablets or tablets.

  The insecticidal composition according to the invention can also be used in the form of dusting powders; it is also possible to use a composition comprising 50 g of active material and 950 g of talc; it is also possible to use a composition comprising 20 g of active material, 10 g of finely divided silica and 970 g of talc; these constituents are mixed and ground and applied

the mixture by dusting.

  As forms of compositions that are liquid or intended to constitute liquid compositions during application, mention may be made of solutions, in particular water-soluble concentrates and emulsions. concentrated suspensions, aerosols. wettable powders (or powder spray),

pasta, gels.

  The concentrated suspensions, which are applicable as sprays, are prepared in such a way as to obtain a stable fluid product which does not settle and usually contain from 10 to 75% of active material, from 0.5 to 15% of surfactants, from 0.1 to 10% of thixotropic agents, 0 to 10% of suitable additives, such as antifoams, corrosion inhibitors, stabilizers, penetrants and adhesives and, as a carrier, water or an organic liquid in which the Active Matter is little or not soluble: some organic solids or mineral salts may be dissolved in the support to help prevent sedimentation or

as antifreezes for water.

  For example, here is a concentrated suspension composition:

Example SC 1:

  Active material 500 g polyethoxylated tristyrylphenol phosphate 50 g polyethoxylated alkylphenol 50 g sodium polycarboxylate 20 g ethylene glycol 50 g organopolysiloxane oil antifoam polysaccharide 1.5 g water 316.5 g Wettable powders ( or spray powder) are usually prepared to contain from 20 to 95% Active Matter, and usually contain, in addition to the solid support, from 0 to 30% wetting agent, from 3 to 20% by weight. a dispersing agent, and, when necessary, from 0.1 to 10% of one or more stabilizers and / or other additives, such as penetrants, adhesives, or agents

anti-caking agents, dyes, etc.

  In order to obtain the spraying powders or wettable powders, the active ingredients are intimately mixed in the appropriate mixers with the additional substances and milled with appropriate mills or other grinders. Spray powders are thus obtained, the wettability and suspension of which are advantageous; they can be suspended with water at any desired concentration and these suspensions can be used very advantageously especially for application to the leaves of plants. In place of the wettable powders, pasta can be made. The conditions and methods of realization and use of these pasta are

  similar to wettable powders or spray powders.

  By way of example, here are various compositions of wettable powders (or powders to be sprayed). EXAMPLE PM 1 - Active matter 50% - ethoxylated fatty alcohol (wetting agent) 2.5% - ethoxylated phenylethylphenol (dispersing agent) 5% - chalk (inert support) 42.5%

PM 2 'example

  - Active Ingredient 10% - oxo synthetic alcohol of branched type, C 13 ethoxylated with 8 to 10 ethylene oxide (wetting agent) 0.75% neutral calcium lignosulfonate (dispersing agent) 12% - calcium carbonate (inert filler ) qs 100% Example PM 3: This wettable powder contains the same ingredients as in the previous example, in the following proportions: - Active material 75% - wetting agent 1.50% - dispersing agent 80 - calcium carbonate (inert filler ) qs I100 o

Example PIM 4:

  - Active material 90 o - ethoxylated fatty alcohol (wetting agent) 4% ethoxylated phenylethylphenol (dispersing agent) 6%

Example PM 5:

  - Active material 50% - mixture of anionic and nonionic surfactants (wetting agent) 2.5% - sodium lignosulfonate (dispersing agent) 5% - kaolinic clay (inert carrier) 42.5% Aqueous dispersions and emulsions, for example the compositions obtained by diluting with water a wettable powder or an emulsifiable concentrate according to the invention, are included in the scope

  of the present invention. The emulsions can be of the water-type

  in-oil or oil-in-water and they can have a thick consistency

like that of a "mayonnaise".

  The insecticidal compositions according to the invention can be formulated in the form of granules that are dispersible in water as well.

  included in the scope of the invention.

  These dispersible granules, whose bulk density is generally between approximately 0.3 and 0.6, have a particle size generally of between approximately 150 and 2000 and preferably between 300 and 300.

and 1500 microns.

  The active matter content of these granules is generally

  between about 1% and 90%, and preferably between 25% and 90%.

  The rest of the granule is essentially composed of a solid filler and optionally surfactant adjuvants conferring on the granule properties of dispersibility in water. These granules can be essentially of two distinct types depending on whether the load retained is solubilized or not in water. When the filler is water soluble, it may be inorganic or, preferably, organic. Excellent results have been obtained with urea. In the case of an insoluble filler, it is of mineral preference, such as kaolin or bentonite. It is then advantageously accompanied by surfactants (in a proportion of 2 to 20% by weight of the granule) of which more than half is, for example, constituted by at least one dispersing agent, essentially anionic, such as polynaphthalene.

  alkali or alkaline earth metal sulphonate or an alkali or alkaline lignosulfonate

  earthy, the rest being nonionic or anionic wetting agents

  such as an alkaline or alkaline earth alkyl naphthalene sulphonate.

  Moreover, although this is not essential, we can add

  other adjuvants such as antifoam agents.

  The granulate according to the invention can be prepared by mixing the necessary ingredients and then granulating according to several techniques known per se (dredger, fluid bed, atomizer, extrusion, etc ...). It is generally finished by crushing followed by sieving at the particle size chosen within the limits mentioned above. It is also possible to use granules obtained as before and then impregnated with a

  composition containing the Active Matter.

  Preferably, it is obtained by extrusion, operating as

  indicated in the examples below.

  GDI Example: Dispersible granules In a mixer, 90% by weight of Active Matter and 10% of urea beads are mixed. The mixture is then milled in a pin mill. A powder is obtained which is moistened with approximately 8% by weight of water. The wet powder is extruded in a perforated roll extruder. A granule is obtained which is dried, then crushed and sieved, so as to keep only the granules of a size

between 150 and 2000 microns.

  EXAMPLE GD2 Dispersible Granules In a mixer, the following constituents are mixed: active material 75% wetting agent (sodium alkylnaphthalene sullonate) 2 ", dispersant (sodium polynaphthalenesulfonate) S 'o - inert filler insoluble in water (kaolin) I5 This mixture is granulated in a fluid bed, in the presence of water, then dried, crushed and sieved to obtain granules of size

between 0.15 and 0.80 mm.

  These granules can be used alone, in solution or dispersion in water so as to obtain the desired dose. They can also be used to prepare combinations with other active ingredients, especially insecticides, the latter being in the form of powders

  wettable, or aqueous granules or suspensions.

  With regard to compositions suitable for storage and transport, they more preferably contain from 0.5 to 95% (by weight) of

Active ingredient.

  Finally, a subject of the invention is a method for the control, as a curative or preventive measure, of harmful insects, in particular insects injurious to cotton, characterized in that an effective amount which is not phytotoxic is applied to the aerial parts of plants. of a composition

insecticide according to the invention.

  The subject of the invention is also a method for treating plants, characterized in that the said crop is chosen from the group comprising cereals (eg wheat, barley, or rye). but the sorghum, the sunflower, the

  cotton, rice, peas, rapeseed, potatoes, vegetable crops.

  The methods according to the invention are particularly useful for the

  destruction of harmful insects or arthropods, preferably on cotton.

  Among these, the various varieties of flies, such as the white fly (Aleurodes, Bemisia sp. Trialeurodes sp.), The gray fly (Phorbia coarctata) or the fly of the senmis (Phorbia platura), the atomaries, the blaniules, scutigerelles, leafhoppers, moths, aphids, and wireworms (Agriotes sp., Athous haemorrhoidalis) are destroyed by the implementation of an association, a composition, a treatment according to the invention. The insecticidal composition which is the subject of the invention is applied by means of various treatment methods such as spraying the aerial parts of the cultures to be treated with a liquid comprising said composition. By "effective and non-phytotoxic amount" is meant a quantity of composition according to the invention which is sufficient to allow the control or destruction of the insects present or likely to appear on the cultures, and which does not cause for said cultures any symptom of phytotoxicity. . Such an amount is likely to vary within wide limits depending on the insect to be combated, the type of culture, the climatic conditions, and the compounds included in the insecticidal composition according to the invention. This quantity can be determined by systematic field trials, within the

the skilled person.

  The doses of use during the implementation of the process according to the invention will then be, on cotton: * 10 to 50 g ha of cypermethrin, preferably 20 to 40 g / ha and still more preferably 36 g / ha, * 100 to 200 g / ha of triazophos, preferably 120 to 180 g / ha and even more preferably 150 g / ha, * 1 to 50 g of acetamiprid, preferably 5 to 10 g / ha and more

preferentially still 8 gha.

  The following examples are given to illustrate the combinations, compositions and treatments according to the invention. Of course these examples are not limiting and many other plants can be treated and insects or

  arthropods controlled by the combinations and compositions according to the invention.

Example: Tests on cotton.

  We carry out tests on cotton. Plots treated were compared with 36 g / ha cypermethrin (a), others treated with 36 g / ha cypermethrin + 8 g / ha acetamiprid (b) and still others with 36 g / ha Il cypermethrin + 150 g / ha of triazophos (c) with Ilfha-treated plots of EC 194 g'I ternary formulation, which yields 36 g ha

  cyperrethrin, 8 g / ha of acetamiprid and 150 gha of triazophos (d).

  The following results are obtained With regard to the number of aphids (reduced to 100 leaves),

  found 67.9 for (a), 82 for (c), 10 for (b) and 12 for our ternary (d).

  As for the number of whiteflies (reduced to 100 leaves), we find 5.47 for (a). 4.38 for (c), 2.05 for (b) and 1.8 for our ternary

(D).

  With regard to the number of mites (reduced to 100 leaves), we find

  16.8 for (a), 2.6 for (c), 8.8 for (b) and 0.9 for our ternary (d).

  Phyllophagous caterpillars (% of plants attacked by Syllepte), found 26.0% of attack for (a), 3.3% for (c), 33.0% for (b)

and 2.7% for our ternary (d).

  Whatever the insect, we note the great interest of the ternary association with respect to the reference product that is cppermethrin, and compared to binary associations. However. also according to said target insect, a binary combination cypermethrin - acetamiprid and cypermnetlhrine +

  triazophos can be interesting.

Claims (10)

REVENDICA.TIONS   An insecticidal composition comprising a pyrethroid type compound and an insecticide of the chloronicotinyl family such as imidacloprid, acetamiprid or nitenpyrani. 2. The insecticidal composition of claim 1 comprising   cypermethrin and acetamiprid.   3. Insecticidal composition according to claim I comprising   cvpermethrin, triazophos and acetamiprid.   4. A composition according to claim 3 comprising cypermethrin, triazophos and acetamiprid in a proportion of 40% of cepermethrin, preferably 10 to 20%, 90% of triazophos, preferably 70 to 80%, I to 10% of acetamiprid, preferably from 2 to 5%, these various percentages being percentages by weight relative to all the insecticidal active ingredients.   5. Composition according to one of the preceding claims   comprising other ingredients such as. protective colloids, adhesives, thickeners, thixotropic agents, penetration agents,   stabilizers, sequestering agents.   6. Composition according to one of the preceding claims   comprising from 0.05 to 95% of active material.   7. Method of protecting crops against insects consisting in   applying a composition according to one of the preceding claims.   235 8. Method according to one of the preceding claims wherein   apply the insecticidal composition to a cotton crop.   9. Method according to one of the preceding claims wherein   apply the insecticidal composition to an infested cotton crop or   likely to be infested by the Heliothis parasite.   10. Method according to one of the preceding claims wherein   the insecticidal composition is applied at a dose of: 10 to 50 g / ha of cypermethrin, preferably 20 to 40 g / ha and more preferably 36 g / ha, 100 to 200 g / ha of triazophos, preferably M) 1 O g.ha and   more preferably still 150 g / ha.   I at 50 g / ha of acetamiprid, preferably 5 to 10 gDha and more preferentially still 8 g / ha.