HK1056295B - Fungicidal composition comprising in particular an oil of vegetable origin with high drying power - Google Patents

Description

Fungicidal compositions containing highly dehydrated vegetable oils

Technical Field

The subject of the present invention is a fungicidal composition for controlling fungal diseases in crops, comprising a strongly dehydrating vegetable oil, and a method for treating crops with a composition according to the invention.

Background

In controlling fungal diseases in crops, it is always desirable to reduce the spread of chemicals into the environment, for example by reducing the application rates.

To this end, certain adjuvants known as bioactivators, such as mineral oils, wetting agents and penetrants, can be used in combination with the commercially available proprietary products. For example, mineral oil-based adjuvants have been mixed with fungicidal compounds to reduce the amount of fungicidal compounds used. This provides farmers with more options for solving certain specific problems.

On the other hand, the use of certain proprietary products has been limited by the phytotoxicity found to be phytotoxic to certain crops.

The invention content is as follows:

it is therefore an object of the present invention to provide novel fungicidal compositions which have better selectivity even on so-called sensitive crops, while retaining the original biological activity of preventing or treating a variety of diseases.

It has been found that these objects are achieved by the fungicidal compositions according to the invention

The invention relates to a fungicidal composition for combating fungal diseases in crops, the essential constituents of which are at least one fungicidal compound and at least one adjuvant of the strongly dehydrated vegetable oil type, the function of which is as a stimulant. The invention also relates to a method for treating crops for the same purpose.

Numerous examples of the use of vegetable oils for pesticides, in particular fungicides, are described in the literature.

However, there is no report of the use of strong dehydrating vegetable oils in fungicidal compositions.

Therefore, the present invention is surprising in that it uses a strongly dehydrated vegetable oil for a fungicidal composition and obtains a unique excellent effect.

The fungicidal compounds used in the present invention are generally known, i.e. known to be effective against diseases which are harmful or potentially harmful to crops such as cereals.

The advantages of using certain vegetable oils also include: the amount of vegetable oil used can be reduced by a factor of 3 while maintaining equivalent biological efficacy.

Moreover, the formulation of the compositions of the present invention allows the resulting plant protective mixture to have excellent physical characteristics suitable for application, allowing it to be used with a variety of other commercially available compositions without the risk of physical and chemical incompatibility.

The stability of the fungicidal compositions of the present invention as an applicable plant protective mixture allows it to be formulated with certain active ingredients that are otherwise difficult to formulate.

It is also an object of the present invention to provide novel fungicidal compositions for controlling diseases.

It is also an object of the present invention to provide fungicidal compositions having improved efficacy in controlling a variety of diseases and/or having higher selectivity.

The present invention also aims to improve the stability and efficacy of fungicidal compositions.

It is also an object of the present invention to provide compositions which are more resistant to adverse weather conditions, especially rain.

Surprisingly, the present invention has obtained a fungicidal composition which solves all or part of the above mentioned problems and drawbacks.

The fungicidal compositions according to the invention are characterized by comprising at least one fungicidal compound A and at least one oil B, which is a vegetable oil and has a strong dehydrating property.

The advantage of using a highly dehydrated vegetable oil is that it is non-toxic or, at least, less toxic than mineral oil, less phytotoxic and more biodegradable.

In a preferred one of the fungicidal compositions according to the invention, the fungicidal compound a is selected from dicarboximide derivatives. Of these, captan, captafol, ethiprole, iprodione, procymidone and vinclozolin, particularly iprodione, are particularly preferable.

The present invention therefore relates to a fungicidal composition comprising an oily organic phase B chosen from unsaturated vegetable oils, isomerized oils, vegetable oil esters, vegetable polymers, and/or mixtures of the above.

The vegetable oil may be from a variety of sources, with vegetable oils from linseed, sunflower, soybean, corn, cotton, safflower and rapeseed being preferred. These vegetable oil feedstocks vary in variety, i.e., crude, refined, and isomerized.

Preferably, the oil is a polyunsaturated vegetable oil having substantial intrinsic unsaturation.

Polyunsaturated oils refer to such triglycerides: wherein the majority of the linear fatty acid chains contain two to three double bonds per chain, for example C18:2 or C18:3, represents a chain containing 18 carbon atoms containing 2 or 3 unsaturated bonds.

The polyunsaturated oil may be, for example, a triglyceride containing predominantly linolenic fatty acid chains (C18:3), such as linseed oil. In general, the amount of the various fatty acids in the compositions of the present invention may be in the following ranges, based on the weight of the oil: 50-60% of C18:3, 10-17% of C18:2, 15-25% of C18:1, 2-4% of C18:0, and 5-8% of C16: 0.

The polyunsaturated oil may be, for example, a triglyceride containing predominantly linoleic fatty acid chains (C18:2), such as sunflower, corn, soybean, safflower, cotton or rapeseed oil. In general, the amount of the various fatty acids in the compositions of the present invention may be in the following ranges, based on the weight of the oil: 45-70% of C18:2, 0.1-10% of C18:3, 10-40% of C18:1, 0.1-10% of C18:0, 1-26% of C16: 0.

In other words, the oil of the present invention is dehydrated. The dehydration can be from natural (dehydrated or semi-dehydrated oils) or from chemical treatment of oils that are not inherently dehydrated (semi-dehydrated or non-dehydrated oils) followed by isomerization of the latter.

The isomerization reaction involves reacting the double bond-CH ═ CH-CH in the fatty acid chain₂-CH-conjugation to form conjugated diene-CH₂Thereby improving its dehydration properties (reactivity with air).

The isomerized oil may be, for example, isomerized sunflower oil containing 16 to 18% conjugated diene and isomerized linseed oil containing 11 to 13% conjugated diene.

For the fungicidal compositions according to the invention, vegetable oils with an iodine value higher than 70, better than 90, 130 and even better than 150, which is linked to the efficacy of dehydration, are preferred.

The invention also relates to the combination of compounds a and B, so that the resulting mixture of the two compounds can be administered immediately as a ready-to-use mixture or freshly prepared compound.

The weight ratio of compound B/A in the compositions according to the invention is generally between 0.15 and 1.6, preferably between 0.2 and 1.35, more preferably between 0.25 and 1, even more preferably between 0.3 and 0.7, and most preferably 0.45.

The composition can be used for treating fungal diseases of various crops. Therefore, rust disease, leaf blister and white spot of barley can be effectively prevented and treated; ocular spot, rust disease, septoria disease, yellow leaf spot disease and fusaria disease of wheat. The composition can also be used for effectively preventing and treating gray mold, alternaria leaf spot, sclerotinia disc mold, white spot and fusarium diseases of high-protein plants and oil-producing plants (such as pea, rape and corn), and treating turf diseases such as rust disease, fusarium disease, alternaria and rough skin disease.

The compositions of the invention are particularly useful for controlling gray mold in grapes, vegetables, peach trees, apricot trees, apple trees, pear trees, rape, peas, lentils and citrus; alternaria diseases of vegetables, peach trees, apricot trees, apple trees, pear trees, rape, potato and citrus; brown rot of peach trees, apricot trees and cherry trees; sclerotinia sclerotiorum of vegetables, rape and potatoes; rough skin disease of vegetables and rice.

Compound a in the compositions of the invention is described in at least the following handbooks: "farm chemical handbook", edited by CliveTOMLIN, the United kingdom Committee for crop protection, 11 th edition; "phytosanitary index 1,2000", the agrotechnical index Association, 36 th edition.

Preferably, compound B in the composition of the invention is a refined and/or isomerized sunflower oil.

In practice, compound a and compound B in the compositions of the invention are generally not used separately.

In the fungicidal compositions according to the invention, the compounds A and B generally represent from 0.5 to 95% by weight of the total composition.

The compositions described above include concentrated compositions, i.e. commercial products containing both active ingredients (in the present invention, the term "active ingredients" includes fungicidal compound a and adjuvant compound B), as well as diluted compositions which can be sprayed immediately onto crops. In the latter case, either a commercial composition containing the two active ingredients (also known as a "finished mix") can be diluted with water, or a fresh mix of a mixture of commercial concentrated compositions containing one of the active ingredients (also known as a "ready-to-mix") can be diluted with water.

The liquid state of the compositions of the present invention may be solutions, suspensions, emulsions and emulsifiable concentrates. Oil-water compositions are preferred in the present invention because they are simple to use and manufacture. Aqueous concentrated suspensions in the form of oil-in-water emulsions made with vegetable oils are preferred.

In a more general sense, the compositions of the present invention may also contain various solid or liquid additives commonly used in the formulation of plant protection products.

The compositions of the present invention may also contain various additives or adjuvants for use in plant-protecting compositions, such as carriers, surfactants, binders, flow improvers and antigelling agents. The composition may also comprise various components such as protective colloids, gelling agents, thickeners, thixotropic agents, penetrants, stabilizers, chelating agents, pigments, polymers, and defoamers.

The "carrier" of the present invention refers to a natural or synthetic organic or inorganic substance combined with an active ingredient to facilitate its application to plants. Thus, the carrier is generally inert to the crop being treated and must be agronomically acceptable. The carrier may be a solid (clay, natural or synthetic silicate, silica, resin, wax, solid fertilizer, etc.) or a liquid (water, alcohol, ketone, petroleum fraction, aromatic or chain hydrocarbon, chlorinated hydrocarbon, liquefied gas, etc.).

The surfactant may be an ionic or non-ionic emulsifier, dispersant or wetting agent and may be, for example, a polyacrylate, lignosulfonate, benzenesulfonate or naphthalenesulfonate, polycondensates of ethylene oxide with fatty alcohols or fatty acids or fatty amines, esters of substituted phenols (e.g. alkylphenols or arylphenols) sulfosuccinic acid esters, taurine derivatives (e.g. alkyl taurates), phosphoric esters of polyoxyethylated alcohols or phenols. At least one surfactant facilitates dispersion of the active ingredient in water for better application to crops.

Oil-water concentrated suspensions refer to aqueous suspensions of the oil-in-water emulsion type, in which the solid active ingredient is suspended in crystalline form in the aqueous phase and in the oily organic phase (i.e. the vegetable oil plus emulsifier in the present invention).

The concentrated suspensions may also be applied by spraying, they are generally prepared as stable liquids, do not thicken or precipitate during storage, and do not undergo phase separation, they generally contain 10 to 75% of active ingredient, 0.5 to 15% of surfactant, 0.1 to 10% of thixotropic agent, 0 to 10% of additives, such as pigments, antifoaming agents, preservatives, stabilizers, penetrants, gelling agents, and water or organic liquids as carriers, in which the active ingredient is insoluble or poorly soluble.

Certain organic solids or inorganic salts may be dissolved or dispersed in the carrier for precipitation control or as an anti-gelling agent in water.

As a preferred example of the present invention, the following is an oil-water concentrated suspension type composition:

example SC 1:

active ingredient 375

Ethoxylated potassium polyarylphenol phosphate 60

Sodium dioctyl sulfosuccinate 10

Ethoxylated oleic acid 8.5

Polyunsaturated vegetable oil 170

Propylene glycol 50

Polysaccharides 1.4

1, 2-Benzisothiazolin-3-one 0.7

Isotridecanol 10

Citric acid monohydrate 1

Replenishing water to 1L

The compositions of the invention are prepared by known methods, for example:

adding propylene glycol, isotridecanol, ethoxylated potassium polyarylphenol phosphate, sodium dioctyl sulfosuccinate and citric acid monohydrate into water while stirring;

continuously stirring to disperse and dissolve the components;

then, adding the active ingredients while stirring;

firstly, pre-grinding the obtained suspension by using a colloid mill, and then grinding the suspension into the final particle size by using a ball mill;

adding a solution containing 2% polysaccharide and 1% 1, 2-benzisothiazolin-3-one to the ground suspension while stirring;

while stirring, an oil phase consisting of vegetable oil and ethoxylated oleic acid is added to form an oil-in-water emulsion.

The fungicidal composition of the present invention can be applied in various ways for treating plant diseases, such as spraying a liquid containing the composition on the above-ground parts of crops, scattering, injecting into plants, and coating. The liquid formulation is preferably sprayed onto the aerial parts of the crop.

Finally, the invention also relates to a method for controlling fungal diseases in crops, characterized in that an effective but non-phytotoxic amount of a composition according to the invention is applied to the aerial parts of the plants.

By "effective, but non-phytotoxic amount" is meant an amount of the composition of the present invention sufficient to control or destroy fungi already present or likely to be present on a crop plant, and not to cause phytotoxic symptoms in the crop plant. Such amounts vary widely depending on the fungus to be targeted, the type of crop, the climatic conditions and the compounds contained in the fungicidal compositions of the invention. This amount can be determined by field trials, which are within the routine skill of those in the art.

Preferably, these compositions are applied at a rate of about 250-1000g/ha, more preferably about 500-750g/ha of compound A and about 0.25-0.45 times the amount of compound B as compound A, and at a rate of about 0.45P (guaranteed active ingredient) of compound B of about 225-337.5g/ha (in which case compound A is applied at a rate of about 750g/ha of the most preferred 500-750).

The amount applied depends on the plant being treated, the extent of infection, the climatic conditions, etc. For example, for turf, the amount of compound a applied may be up to 5 kg/ha.

The phytopathogenic fungi which can be controlled by the process according to the invention include in particular:

deuteromycetes:

alternaria, such as a.solani, alternaria citrifolia (a.citri), alternaria mali (a.mali), alternaria chrysanthemi (a.kikuchiana), a.alternata, a.porri, alternaria brassicae (a.brassie), a.brassicola, alternaria carota (a.dauci) and the like;

botrytis, such as botrytis cinerea (b.cinerea) or b.squamosa;

sclerotinia, such as sclerotinia sclerotiorum (s.sclerotium), sclerotinia sclerotiorum or s.homeocarpa;

penicillium, such as penicillium digitatum, penicillium expansum;

pedunculate species, such as m.mali, m.laxa, pedunculate;

rhizopus, such as rhizopus nigricans;

sclerotium, such as s.cephalovorum;

fusarium, e.g. fusarium roseum;

helminthosporium, such as h.allii;

ascochyta, for example a. pisi;

microdochium, e.g. m.

Basidiomycetes

Rhizoctonia species.

The classifications made for the crops not according to the fungus targeted are:

-barley: leukoderma (helminthosporium);

-rape: alternaria leaf spot (alternaria), gray mold (b. cinerea), sclerotinia sclerotiorum (s. sclerotium);

-grape: gray mold (b. cinerea);

-solanaceous crops: alternaria leaf spot (alternaria) and gray mold (b. cinerea);

-vegetables: alternaria leaf spot (alternaria), sclerotinia sclerotiorum (s. sclerotium), gray mold (b. cinerea), root rust (rhizoctonia);

-rice: root rust (rhizoctonia), ear kernel discoloration (alternaria, helminthosporium, etc.);

-fruit trees: alternaria leaf spot (alternaria), gray mold (b. cinerea) and brown rot (penicillium digitatum, penicillium expansum);

-citrus: scab (Elsinoe citrifolia), Chlorella virginiana (Penicillium digitatum, Penicillium expansum);

-a turf: rust, powdery spores, leukoderma, pythium, rhizoctonia solani, s.homeocarpa, and the like;

crops to which the method of the invention is applicable include, for example, cereals, from which are barley, high-protein plants and oil-producing plants, such as peas, oilseed rape, sunflowers, maize, grapes, potatoes, tomatoes, vegetables (lettuce, cucumber, etc.), rice, fruit trees (apple trees, pear trees, cherry trees, etc.), citrus and turf.

In the method of the present invention, the composition of the present invention is generally prepared from a finished concentrate or ready-to-formulate mixture and applied, and therefore, components A and B of the composition are generally applied simultaneously.

The invention also relates to products for the simultaneous, sequential or separate application of compounds a and B in the fungicidal compositions according to the invention.

The following are examples, but the excellent features of the present invention are not limited thereto.

The roman numbered compositions are of the type described above.

Detailed Description

Example 1

The following two roman-numbered formulations were compared for the effect of vegetable and mineral oils on selectivity and efficacy in the presence and absence of rain:

i: 255g/l iprodione +255h/l mineral oil SIB (i.e. summer insecticide base) (SC).

II: 255g/l iprodione +255h/l rapeseed oil CT (SC).

The following are selectivity tests performed on tobacco plants:

both formulations were sprayed on 2 week old tobacco plants (4-6 leaf stage) at 750g and 1500g iprodione per hectare, at 150L of the plant protective mixture per hectare, and 3 replicates per trial. After the product sprinkled on the leaf surface dries, the plant is moved into an artificial environment room: day 25 ℃ and night 20 ℃ (day 16h/8 h). The phytotoxicity index (disease surface%) was determined 7 days later (7JAT1), followed by a second treatment as described before and the plants were again placed under the aforementioned conditions. The final phytotoxicity index (7JAT2) was determined 7 days later.

Selectivity is		7JAT1	7JAT2
				I-750g/ha1500g/ha	1PSIB mineral oil	0.72.3	1.04.3
II-750g/ha1500g/ha	1P rape CT vegetable oil	1.01.3	1.01.3

As a result, it was found that the rapeseed oil preparation had a higher selectivity than the mineral oil plus summer insecticide base preparation at the same oil amount.

The following are the effects on Botrytis cinerea measured on Cucumis sativus under rinsing and no rinsing (i.e. with and without rain):

the test formulations were administered at the following doses: no flushing: 50, 100, 200 and 400ppm iprodione; washing: 100, 200, 400 and 800ppm iprodione. The formulation was sprayed on gherkin at the first cotyledon emergence stage, with each trial repeated 2 x 3 times. After 4 hours, 3 plants per dose group were washed with 25mm rain. After 1 day, the cucumber plants were infected, i.e.a water inoculum containing 150000/L botrytis cinerea spores was added dropwise. They were then placed in an artificial environmental chamber: 12-15 deg.C, phaseThe humidity is 100%. Index (surface% of disease) was measured 7 days after inoculation. Then, an S-shaped dose-response curve was created from the obtained data, and IC90 (concentration having 90% inhibitory effect on disease) and the confidence interval of each IC90 were determined from the curve.

Effect and rain proofness		IC90	Min.IC	Max.IC
					I-No rain and rain	1PSIB mineral oil	137459	96383	194550
II-No rain with rain	1P rapeseed oil CT	228473	188387	273572

In the absence of rain, the effect of the rapeseed oil formulation was slightly lower than the mineral oil SIB formulation, but the difference was not significant.

On the other hand, the effect of the rapeseed oil preparation is comparable to a preparation containing an equivalent amount of mineral oil, subject to washing, i.e. in the presence of rain.

Example 2

The effect of vegetable and mineral oils in rainy conditions (rain protection) was studied with the following two formulations:

III: 255g/L iprodione +350g/L mineral oil sib (sc);

IV: 500g/L iprodione +125g/L linseed oil TS (SC).

The effect on botrytis cinerea under rainy conditions was determined on gherkin. The test procedure was as described previously.

Effect and rain proofness		IC90	Min.IC	Max.IC
					III-rain	1.35P SIB mineral oil	805	593	1093
IV-rain	0.25P linseed oil TS	962	915	1012

Linseed oil formulations were slightly less effective than mineral oil, but the difference was not significant. Therefore, in the presence of rain (wash-off resistance), the effect of this linseed oil preparation is comparable to that of a preparation containing 1.35P mineral oil. It is noted that the amount of vegetable oil used in formulation IV is about 5 times less than that used in formulation III (the same amount of active ingredient).

Example 3

The effect of vegetable and mineral oils on the efficacy of sterilization in rainy conditions (rain protection) was studied with the following 4 formulations:

v: 500g/L iprodione +175g/L linseed oil TS (SC);

VI: 500g/L iprodione +175g/L refined sunflower oil (SC);

VII: 500g/L iprodione +175g/L mineral oil SIB (SC);

III: 255g/L iprodione +350g/L mineral oil SIB (SC).

The effect on botrytis cinerea under rain wash was determined on gherkin. The test procedure was as described previously.

Effect and rain proofness		IC90	Min.IC	Max.IC
					V	0.35P linseed oil	327	262	407
VI	0.35P refined sunflower oil	287	252	330
					VII	0.35P SIB mineral oil	497	445	555
III	1.35P SIB mineral oil	290	225	372

Both vegetable oil formulations contained only 0.35P oil, but had rain protection comparable to formulation III (containing 3.8 times more mineral oil).

It was found that formulations containing 0.35P mineral oil were significantly less rain repellent than formulations containing equivalent amounts of polyunsaturated vegetable oils such as refined sunflower or linseed oil.

Example 4

The effect of vegetable and mineral oils on efficacy, rain protection and selectivity was studied with the following 3 formulations:

VIII: 500g/L iprodione +175g/L isomerized sunflower oil (SC);

IX: 500g/L iprodione, oil free (SC);

III: 255g/L iprodione +350g/L mineral oil SIB (SC).

The effect on Botrytis cinerea was determined on gherkin with and without rain wash. The test procedure was as described previously.

Effect and rain proofness		IC90	Min.IC	Max.IC
					VIII-No rain-rain	0.35P isomerized sunflower oil	165509	106397	257653
IX-no rain-rain	Oil-free	168954	95702	2971297
					III-No rain-rain	1.35P SIB mineral oil	162487	108428	242555

The effect of the preparation containing isomerized sunflower oil was comparable to that of preparation III both in the presence and absence of rain. The use of such polyunsaturated vegetable oils can reduce the oil content of the plant protective mixture by a factor of about 3.8.

The selectivity was determined on tobacco plants according to the procedure described previously:

selectivity is		7JAT1	7JAT2
				VIII-750g/ha-1500g/ha	0.35P isomerized sunflower oil	00	1.72.0

IX-750g/haIX-1500g/ha	Oil-free	0.70.3	1.00.3
				III-750g/haIII-1500g/ha	1.35P SIB	1.313.0	1.315.0

After the first application, the mineral oil formulations exhibit an impermissible phytotoxicity. In contrast, isomerized sunflower oil preparations were found to be particularly selective on tobacco plants.

Example 5

The effects of vegetable and mineral oils on effect, wash fastness and selectivity were compared with the following 5 formulations:

x: 375g/L iprodione +131g/L refined sunflower oil (SC);

XI: 375g/L iprodione +169g/L refined sunflower oil (SC);

XII: 375g/L iprodione +206g/L refined sunflower oil (SC);

IX: 500g/L iprodione, oil free (SC);

III: 255g/L iprodione +350g/L mineral oil SIB (SC).

The effect on botrytis cinerea was determined on gherkin in the presence and absence of rain. The test procedure was as described previously.

Effect and washability		IC90	Min.IC	Max.IC
					X-no rain-rain	0.35P refined sunflower oil	150512	107492	212533
XI-no rain-rain with rain	0.45P refined sunflower oil	135479	111439	165522
					XII-No rain-rain	0.55P refined oleum Helianthi	142426	120379	169480
IX-no rain-rain	Oil-free	139838	95621	2021129
					III-No rain-rain	1.35P SIB	205532	137425	307666

The effect and rain-proofing properties of the preparation containing 0.35P, 0.45P and 0.55P refined sunflower oil were comparable to those of preparation III in the absence of rain. The use of such highly polyunsaturated vegetable oils can reduce the oil content of the plant protective mixture by a factor of about 3.8.

The selectivity of the above 5 formulations and the following formulations was determined on tobacco plants:

XIII: SC containing 375g/L iprodione +199g/L mineral oil SIB.

The formulation allows the measurement of the effect of mineral oil dosage on product selectivity.

The test procedure was as described previously.

Selectivity is

7JAT1

7JAT2

X-750g/ha-1500g/ha	0.35P refined sunflower oil	0.30.3	1.00
				XI-750g/ha-1500g/ha	0.45P refined sunflower oil	0.71.3	1.00.7
XII-750g/ha-1500g/ha	0.55P refined oleum Helianthi	0.70.7	0.31.3
				IX-750g/ha-1500g/ha	Oil-free	0.30	00
XIII-750g/ha-1500g/ha	0.53P SIB	1.02.3	0.32.3
				III-750g/ha-1500g/ha	1.35P SIB	2.73.3	2.36.0

The selectivity of the refined sunflower oil preparation is superior to that of the preparation III. Phytotoxicity caused by mineral oils is sometimes not allowable and, moreover, the toxicity is dose-dependent.

Example 6

The effects of vegetable and mineral oils on effect, wash fastness and selectivity were compared with the following three formulations:

XIV: 375g/L iprodione +170g/L refined sunflower oil (SC);

IX: 500g/L iprodione, oil free (SC);

III: 255g/L iprodione +350g/L mineral oil SIB (SC).

The effect on botrytis cinerea under both rainy and no-rain conditions was determined on gherkin. The test procedure was as described previously.

Effect and rain proofness		IC90	Min.IC	Max.IC
					XIV-no rain-rain	0.45P refined sunflower oil	122446	83392	178513
IX-no rain-rain	Oil-free	114671	97518	134880
					III-No rain-rain	1.35P SIB mineral oil	116509	104411	129630

The effect and rain-proofing of the formulation containing refined sunflower oil under no rain conditions were comparable to those of formulation III. The use of such polyunsaturated vegetable oils reduces the oil content of the treatment with the plant protective mixture by a factor of 3.

The selectivity of the formulation was determined on tobacco plants:

the test procedure was as described previously.

Selectivity is		7JAT1	7JAT2
				XIV-750g/ha-1500g/ha	0.45P refined sunflower oil	1.74.7	1.73.7

IX-750g/ha-1500g/ha	Oil-free	0.31.3	0.30.3
				III-750g/ha-1500g/ha	1.35P SIB mineral oil	3.316.7	1.316.7

After the first application, the mineral oil formulations exhibit an impermissible phytotoxicity. On the other hand, the selectivity of the formulation containing 0.45P refined sunflower oil was significantly higher than that of formulation III.

Conclusion

In conclusion, polyunsaturated vegetable oil formulations can very well achieve the objects of the invention. In fact, vegetable oil formulations have higher selectivity and bioactivity than mineral oil formulations (summer insecticide base), whether or not subjected to rinsing, which is equivalent to the best results of mineral oil plus summer insecticide base formulations.

The concentrated suspension according to the invention also has the advantage that: the amount of oil in the plant protection mixture is 3 times less than that of the conventional SIB preparation of mineral oil.

Claims (11)

1. Fungicidal composition comprising a fungicidal compound a, which is iprodione, and an oil B, which is selected from the group consisting of linseed oil, sunflower oil, corn oil, soybean oil, safflower oil, cotton oil and rapeseed oil, which is a highly dehydrated vegetable oil with an iodine value higher than 70, the weight ratio oil B/compound a being between 0.15 and 1.6, said compound a and oil B representing between 0.5 and 95% of the total weight of the composition.

2. The fungicidal composition according to claim 1, wherein the iodine value of the oil B is higher than 90

3. The fungicidal composition according to claim 1, wherein the iodine value of the oil B is higher than 130.

4. The fungicidal composition according to claim 1, wherein the iodine value of the oil B is higher than 150.

5. The fungicidal composition according to claim 1, wherein the weight ratio of oil B/compound a is from 0.2 to 1.35.

6. The fungicidal compositions according to claim 1, wherein the weight ratio oil B/compound A is between 0.25 and 1.

7. The fungicidal composition according to claim 1, wherein the weight ratio of oil B/compound a is from 0.3 to 0.7.

8. The fungicidal composition according to claim 1, wherein the weight ratio oil B/Compound A is 0.45.

9. A method of controlling fungal diseases in crops comprising applying the fungicidal composition of any preceding claim to the aerial parts of the plants.

10. The method of claim 9, wherein the crop is selected from the group consisting of cereals, high protein plants, oil producing plants, vegetables, fruit trees and turf.

11. The method of claim 9, wherein the crop is selected from barley, pea, rape, sunflower, corn, grape, potato, tomato, lettuce, cucumber, rice, apple, pear, cherry, citrus.