EP3136853A1 - Utilisation d'alcool(s) comme fongicide et/ou algicide - Google Patents
Utilisation d'alcool(s) comme fongicide et/ou algicideInfo
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- EP3136853A1 EP3136853A1 EP15759833.5A EP15759833A EP3136853A1 EP 3136853 A1 EP3136853 A1 EP 3136853A1 EP 15759833 A EP15759833 A EP 15759833A EP 3136853 A1 EP3136853 A1 EP 3136853A1
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- Prior art keywords
- crops
- alcohol
- frac
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
- A01N31/02—Acyclic compounds
Definitions
- the present invention relates to novel fungicides and / or algicides for controlling organisms of the family Pythiaceae and / or against diseases caused by them. It also relates to compositions and preparations comprising these novel fungicides and / or algicides, as well as their methods of obtaining and their uses.
- the family Pythiaceae comes from the class Oomycetes, which has long been classified in the line of Fungi (mushrooms). In fact, the online mushroom database, Mycobank, still lists the Pythiaceae family as mushrooms. However, researchers have recently shown that Oomycetes were rather part of the line of algae Heterokonthes, also called Stramenopiles algae, than that of Fungi (fungi). In this new classification, Oomycetes are then termed "fungiform". As a result, an active substance that may control an organism of the Pythiaceae family and / or a disease caused by it, a fungicide and / or an algaecide will be considered.
- a fungicide is a phytopharmaceutical product intended to control at least one fungus or fungiform organism or against at least one disease caused by them, while an algicide is a phytopharmaceutical product intended to control at least one algae or against or diseases caused by it.
- Plant protection product means an active substance or a composition comprising one or more active substances, which is intended in particular for:
- An active substance is a substance, including a micro-organism, that has a general or specific action on a pest or a plant.
- the active substances can be either of origin natural, derived from synthetic chemistry, which may be mimetics of natural substances, such as pheromones.
- plant is meant in particular a plant and / or part of a plant, including a fruit, a vegetable or a seed.
- propamocarb hydrochloride used for controlling Pythium and Phytophtora organisms and the diseases caused by them.
- Propamocarb hydrochloride is considered to cause damage to the eyes and can break down by releasing dangerous gases when exposed to heat.
- the patent application FR2235644 discloses a method for combating diseases caused by persistent fungi during the winter on woody plants, characterized in that said plants are treated in a dormancy phase or approaching a dormancy phase at means of a composition which comprises a surfactant which is a condensation product of an alkylphenol with ethylene oxide, and a fatty acid ester or a fatty alcohol, in a given weight ratio.
- a surfactant which is a condensation product of an alkylphenol with ethylene oxide, and a fatty acid ester or a fatty alcohol, in a given weight ratio.
- ethoxylated alkylphenols are considered as endocrine disruptors.
- the surfactant most commonly used in the examples of the application would have a deleterious effect on aquatic ecosystems, and its degradation products, such as nonyphenol, would be even more persistent in the environment and more toxic. This is why these surfactants are banned in some countries, such as France.
- the examples of this application describe a fungicidal action only with respect to apple powdery mildew (caused by Podosphaera leucotricha) and not with respect to any disease caused by any of the organisms of the family Pythiaceae. .
- the fight is so specific to a disease caused by an organism different from the organisms targeted by the invention.
- the present invention therefore relates to the use of an alcohol having 7 to 9 carbon atoms as a fungicide and / or aigicide for controlling an organism of the family Pythiaceae and / or a disease caused by it.
- fighting against an organism By fighting against an organism is meant killing the body (curative effect), currently called fungus, fungiform organism and / or algae, prevent its occurrence (preventive effect), and / or control its proliferation.
- the fight against a disease caused by the body means eradicating the disease (curative effect), prevent its occurrence (preventive effect) and / or control its evolution and / or its spread.
- alcohol having 7 to 9 carbon atoms is more particularly an alcohol having 7 to 9 carbon atoms linear or branched.
- linear or branched cyclic alcohols are specifically excluded.
- the alcohol having 7 to 9 carbon atoms is an alcohol consisting of a hydrocarbon chain, linear or branched, having 7, 8 or 9 carbon atoms, substituted by a single hydroxyl group (OH).
- hydrocarbon chain is meant a chain consisting solely of carbon and hydrogen atoms. In other words, the alcohol having 7 to 9 carbon atoms does not contain a heterosubstituent other than the single hydroxyl group.
- the alcohol is saturated.
- the alcohol having 7 to 9 carbon atoms has the following empirical formula:
- n is an integer equal to 7, 8 or 9.
- octanol also known as octan-1-ol or caprylic alcohol
- nonanol or nonan-1-ol or pelargonic alcohol
- the alcohol having 7 to 9 carbon atoms may be used alone or in admixture with one or more other alcohols having 7 to 9 carbon atoms.
- the alcohol having 7 to 9 carbon atoms is used as a fungicide and / or aigicide and is hereinafter also referred to as "the fungicide and / or aigicide according to the invention".
- this alcohol can be obtained from renewable resources, such as from animal fats or vegetable oils.
- the organism of the Pythiaceae family is Pythium and / or Phytophthora.
- organisms of these species include Phytophthora infestans, Phytophtora cinnamomi, Phytophtora ramorum, Phytophthora capsici, Phytophthora palmivora, Phytophthora fragariae, Phytophthora citrophthora and Phytophthora parasitica, Pythium sp., Pythium ultimum, Pythium aphanidermatum, Pythium Irregulare and Pythium group F.
- the fungicide and / or algicide according to the invention is used to fight against Pythium sp. and / or Phytophthora infestans and / or one or more disease (s) caused by them.
- Targeted action on these species of organisms allows selective control of Pythium sp. and / or Phytophthora infestans and / or the disease (s) caused by them.
- the fungicides and / or algicides according to the invention act on certain resistant strains of Pythium sp., In particular strains very resistant to fungicides of phenylamide types (FRAC code 4) and Qol ("Quinone outside inhibitor", FRAC code 1 1).
- the FRAC (Fungicide Resistance Action Committee) codes correspond to a classification of fungicides according to their mode of action. At the level of each mode of action, fungicides are classified by chemical family, which is associated with a code (see http://www.frac.info/).
- Phytophthora infestans For example, late blight of potato and late blight of tomato are caused by Phytophthora infestans; wood gummosis and brown fruit rot (mandarin and tangelos) are caused by Phytophthora citrophthora and Phytophthora parasitica.
- the fungicide and / or algicide according to the invention can be used to treat a crop selected from vegetable crops, ornamental crops, tropical crops, oilseed crops, fruit crops and / or cereal crops, or a plant from these cultures.
- the treatment can be carried out as a preventive and / or curative. In particular, it can be performed outside a period when the plant is dormant or is approaching a dormancy phase.
- Vegetable crops include potatoes, cabbages, aubergines, zucchini, pumpkins, salads (lettuce, escarole, lamb's lettuce), tomatoes, beans, peas and carrots. onions, turnips, spinach, chicory, endives, chicory, peppers, greenhouse peppers, greenhouse cucumbers, alfalfa.
- Ornamental crops include non-perennial perennials, bulbs, tubers or rhizomes, grasses, cacti, succulents, turf and lawns (including golf course greens). , ornamental trees and shrubs, outdoors or under protection, such as roses, azaleas, rhododendrons, dahlias, begonias, nasturtiums, daisies, coleus, thuja.
- oleaginous crops is meant more particularly the crops of rapeseed, flax.
- fruit crops we mean more particularly strawberries, raspberries, melons, citrus fruits such as lemons, limes, pomelos, mandarins and tangelos.
- Cereal crops are more particularly crops of rye and maize.
- the fungicide and / or algicide according to the invention is used to treat potato, tomato, corn, soybean, rice, cottonseed and / or rapeseed crops, or the plants derived therefrom. cultures. More particularly, the fungicide and / or algicide according to the invention is suitable for treatment: - corn, soybeans, rice and cottons against the organism Pythium sp. and / or a disease caused by it, and
- the fungicide and / or aigicide according to the invention used to treat the cultures described above, is chosen from alcohols having 8 carbon atoms or their mixture.
- the alcohol having 8 carbon atoms has all the particular and preferred characteristics of alcohols having 7 to 9 carbon atoms.
- it is octanol, octan-2-ol and / or 2-ethyl hexanol, preferably octanol.
- Octanol, octan-2-ol and / or 2-ethylhexanol can advantageously be obtained from renewable resources such as vegetable oils.
- octanol can be obtained by reducing caprylic acid, itself derived from vegetable oil of coconut and / or palm kernel.
- Octanol is not very ecotoxic and easily biodegradable, more than 70% in 30 days.
- 2-Ethylhexanol which can be synthesized from vegetable raw materials, is also easily biodegradable, 100% in 5 days.
- octanol is used as a fungicide and / or aigicide for: controlling Pythium sp. and in particular against the sensitive and / or resistant strains of Pythium sp.,
- damping-off such as damping-off of maize.
- the fungicide and / or aigicide according to the invention is mixed with one or more other phytopharmaceutical product (s) such as a fungicide, an aigicide and or a growth regulator.
- s phytopharmaceutical product
- the fungicide and / or aigicide according to the invention is used in admixture with another fungicidal and / or aigicidal substance.
- the other fungicidal and / or subcidal substance may be selected to provide a mixture having a broader spectrum of action.
- action spectrum is meant all the activities of the mixture resulting from the sum of the activities of each of the fungicides and / or algicides.
- the other fungicidal and / or subdal substance may act on an organism other than those belonging to the family Pythiaceae, such as an organism belonging to the Oomycetes class (excluding Pythiaceae), Deuteromycetes, Basidiomycetes, and / or Ascomycetes, and / or a disease caused by them.
- the other fungicidal and / or algicidal substance may also be selected to obtain a mixture having at least two different modes of action targeting the same organism (s) to have increased efficacy against one or more organism (s) of the family Pythiaceae and / or the disease (s) caused by them.
- the complementarity of the modes of action makes it possible to act at the same time according to several modes of attack, which makes the mixture fungicide and / or algicide more effective.
- the complementarity of the modes of action of such mixtures of fungicide (s) and / or algicide (s) makes it possible to overcome the resistance developed by the pathogenic organisms with regard to certain active substances and to avoid creating resistances.
- the combination of the fungicide and / or algicide according to the invention with another fungicidal and / or algicidal substance has the advantage of being able to reduce the necessary quantity of this other fungicidal and / or algicidal substance while obtaining a similar result.
- the reduction of the quantity of substance (s) of petrochemical origin thus has a great advantage in terms of human health and protection of the environment.
- This reduction in the quantity of fungicidal substance (s) and / or algaecide (s) of petrochemical origin is all the more important when a synergistic effect is observed between a fungicide and / or an algicide according to the in particular an alcohol or a mixture of alcohols having 8 carbon atoms, such as octanol, and another fungicidal and / or algicidal substance.
- the combination of octanol, octan-2-ol and / or 2-ethylhexanol with a fungicidal substance such as Fluazinam makes it possible to fight against the organisms of the family of Pythiaceae, while being more environmentally friendly, because of the lower effective amount of Fluazinam needed compared to a single use of the latter.
- a fungicidal substance such as Fluazinam
- the fungicide and / or algicide according to the invention may be of renewable and biodegradable origin, could advantageously be used in organic farming.
- Organic farming is a method of agricultural production that aims to limit the use of products derived from synthetic chemistry and to favor products of renewable origin and weakly ecotoxic.
- the invention also relates to compositions comprising an alcohol having 7 to 9 carbon atoms.
- the invention relates to compositions comprising an alcohol having 7 to 9 carbon atoms, as defined above.
- the composition comprises an alcohol having 7 to 9 carbon atoms and a product selected from the group consisting of paraffin, paraffinic mineral oil, hydrocarbon polymers, oil rapeseed oil, in particular rapeseed oil methyl esters, fatty amine polymers, dimethyl polysiloxane, terpene alcohols, ethoxylated triglycerides, resins, polyvinyl alcohols, alpha olein sulfonate, sulfuric esters, sulfonated fatty acid alcohols, diethylene glycol abietate, polysorbates, acrylic polymers, vinyl acetate-maleic ester polymers, cellulosic binders, potassium aluminosilicate, copper taliate copper, latex, especially synthetic, bright blue dye (or "acid blue”), pine oil, ammonium sulphate, white mineral or petroleum oils, t rethanolamine, vegetable oil or fatty acid methyl esters, polyoxyalky
- the composition according to the invention comprises an alcohol having 7 to 9 carbon atoms and a product chosen from the group consisting of paraffin, paraffinic mineral oil, hydrocarbon polymers, rapeseed oil esterified rapeseed oil, in particular rapeseed oil methyl esters, dimethyl polysiloxane, terpene alcohols, ethoxylated triglycerides, polyvinyl alcohols, alpha olein sulfonate, sulfuric esters, sulfonated fatty acid alcohols , diethylene glycol abietate, polysorbates, acrylic polymers, vinyl acetate-maleic ester polymers, cellulosic binders, potassium aluminosilicate, copper taliate copper, latexes, in particular synthetic, blue dye brilliant (or "acid blue”), mineral white oils or oil, methyl esters of vegetable oil or fatty acids, or their mixture.
- a product chosen from the group consisting of paraffin, paraffinic mineral oil
- the product mentioned above is an adjuvant.
- adjuvant is meant a compound or a preparation devoid of phytopharmaceutical activity, which, combined with an alcohol having 7 to 9 carbon atoms or a mixture of these alcohols, improves the physical and chemical qualities thereof. or biological, especially their fungicidal and / or algicidal activity, while limiting the harmful effects and impacts on humans, fauna and flora.
- the increase of the fungicidal and / or algicidal activity may for example result from a better vectorization or a better targeting of the part to be treated and / or an improvement of the stability of the fungicides and / or algicides, for example, protecting them from ultraviolet light.
- the composition comprises an alcohol having 7 to 9 carbon atoms and vegetable oil methyl esters, in particular rapeseed oil methyl esters.
- the alcohol having 7 to 9 carbon atoms can be linear or branched.
- linear alcohol there may be mentioned heptanol (or heptan-1-ol), octanol (also called octan-1-ol or caprylic alcohol) or nonanol (or nonan-1 -ol or pelargonic alcohol) .
- octan-2-ol 2-ethyl-hexanol, 7-methyl-octan-1-ol or 6-methyl-pentan-1-ol.
- the alcohol may be used alone or in admixture with one or more other alcohols having 7 to 9 carbon atoms.
- the alcohol can be obtained from renewable resources, such as from animal fats or vegetable oils.
- the alcohol is octanol, octan-2-ol and / or 2-ethyl hexanol, preferably octanol.
- composition according to the invention further comprises a fungicidal and / or algicidal substance.
- the fungicidal and / or algicidal substance is suitable for the treatment of a crop selected from vegetable crops, ornamental crops, tropical crops, oilseed crops, fruit crops and / or cereal crops, as previously described. or a plant derived from these crops.
- the composition according to the invention is suitable for the treatment of potato, tomato, rapeseed, soybean, rice and / or cottonseed crops.
- the composition according to the invention then comprises two fungicides and / or algicides.
- the composition according to the invention may have a broader spectrum of action, by choosing in particular the fungicidal and / or subcidal substance from the group consisting of phenylamides (FRAC code 4), heteroaromatics (code FRAC 32), carboxylic acids (FRAC code 31), methyl-benzimidazole carbamates (FRAC code 1), N-phenyl carbamates (FRAC code 10), benzamides and thiazole carboxamides (FRAC code 22), phenylureas (FRAC code 20), benzamides (FRAC code 43), pyridinamines and pyrazole-MET1 (FRAC code 39), succinate dehydrogenase inhibitors (SDHI) (FRAC code 7), Qol ("quinone outside inhibitors") ( FRAC 11 codes), Qil (“Quinone inside inhibitors”) (FRAC code 21), dinitro-phenyl crotonates and 2,6-dinitroanilines (FRAC code 29), tin
- the fungicidal and / or algicidal substance may be chosen from the group consisting of phenylamides (FRAC code 4), heteroaromatics (FRAC code 32), carboxylic acids (FRAC code 31), methyl-benzimidazole carbamates (code FRAC 1), N-phenyl carbamates (FRAC code 10), benzamides and thiazole carboxamides (FRAC code 22), phenylureas (FRAC code 20), benzamides (FRAC code 43), pyridinamines and pyrazole-MET1 (FRAC 39 code), the succinate dehydrogenase inhibitors (SDHI) (FRAC code 7), the Qol ("Quinone outside inhibitors") (FRAC codes 11), the Qil (“quinone inside inhibitors”) (FRAC code 21), dinitro-phenyl crotonates and 2,6-dinitroanilines (FRAC code 29), tin-based organic compounds (FRAC code 30), thiophene-
- the composition according to the invention can have an increased efficacy against an organism of the family Pythiaceae and / or a disease caused by it, by choosing the fungicidal and / or algicidal substance among those also struggling against an organism of the family Pythiaceae and / or a disease caused by it. This is all the more true if the modes of action of the alcohol having 7 to 9 carbon atoms and the fungicidal and / or algicidal substance are different.
- the fungicidal and / or algicidal compositions thus obtained are effective while being less toxic to humans and the environment.
- the complementarity or the synergistic effect allows the use of a smaller amount of traditional fungicides, for example of petrochemical origin, for a similar result.
- the fungicidal and / or algicidal substance is chosen so as to act against an organism chosen from Phytophthora and / or Pythium, more particularly Phytophthora infestans and / or Pythium sp., And / or against a disease caused by them. .
- This fungicidal and / or algicidal composition is also particularly effective against resistant strains of Pythium sp.
- the fungicidal and / or algicidal substance is chosen from the group constituted by the amino acid carbamates (FRAC code 40), such as Dimethomorph, Valifenalate, Benthiavalicarb, Mandipropamide; benzamides (FRAC code 22), such as Zoxamide; benzamides (FRAC code 43), such as Fluopicolide, Propineb; cyanoacetamideoxime (FRAC 27 code), such as Cymoxanil; phenylamides (FRAC code 4), such as Benalaxyl, Mefenoxam or Metalaxyl; Qol ("Quinone outside Inhibitors" (FRAC code 1)), such as Pyraclostrobin, Famoxadone and Fenamidone; 2,6-dinitroanilines (FRAC code 29), such as Fluazinam; Qil ("Quinone inside Inhibitor” (code FRAC 21)), as Cyazofamid; carbamates (FRAC code 40),
- the fungicidal and / or algicidal substance can be adapted to soil treatment, such as Propamocarb, Dazomet, Gliocladium catenula, Metam-sodium.
- the fungicidal and / or algicidal substance can be adapted to the treatment of the aerial parts of plants, such as Fluazinam, Mancozeb, copper or a salt thereof, Cymonaxil, Folpel, Mandipropamide or Dimethomorph.
- the composition according to the invention comprises, as fungicidal and / or algicidal substance, Fluazinam.
- compositions according to the invention comprise, as alcohol having 7 to 9 carbon atoms, octanol and are used for:
- damping-off such as damping-off of maize.
- compositions according to the invention may further comprise a solvent, a surfactant and / or a second adjuvant.
- solvent is meant a liquid under the conditions of use, which has the property in particular to dissolve or dilute other substances without causing chemical modification of these substances and without itself change.
- solvent preferably organic solvents, even more preferably organic solvents of renewable origin, such as organic solvents of vegetable origin.
- surfactant also called surfactant or surfactant is meant a compound that modifies the surface tension between two surfaces.
- the surfactants are ionic and / or nonionic, acceptable in agriculture. Even more preferably, the surfactants are of renewable origin, such as alkyl polyglucosides, alkyl polypentosides and / or sorbitan esters.
- an adjuvant may comprise a solvent and / or a surfactant.
- an adjuvant comprising a solvent comprising a solvent, alone or in combination with other compounds: an adjuvant based on methyl esters of animal fats or of vegetable oils such as Actirob®B, Radiamix® or Vegestar® (rapeseed oil methyl esters with surfactants marketed by Novance®), or Adigor® marketed by Syngenta®, or such as Radia® 7961 (rapeseed oil methyl esters) or Radia® 7064 (methyl esters of soybean oil) marketed by Oleon®, an adjuvant based on polyoxyalkylated fatty alcohol phosphate esters, fatty acid methyl esters and oleic acid such as Dash® HC from BASF®, an adjuvant based on methyl esters and guar, such as AgRho StarGuar® 4 EU from Rhodia®, an adjuvant based on isodecyl alcohol ethoxylate such as Trend® 90 marketed by DuPont ®, an adjuvant based
- HeSiosol® marketed by Action Pin® an adjuvant based on ethyl esters of sunflower oil and surfactants such as TRS2® marketed by SDP®, an adjuvant based on rapeseed oil ethyl esters and surfactants such as Hasten® marketed by Georgia Chemicals, a paraffinic mineral oil-based adjuvant such as Banole® marketed by Total® and an adjuvant based on a vegetable oil emulsion such as MexAgri® sold by Mexel®.
- an adjuvant consisting of or comprising one or more surfactants: an adjuvant based on methyl esters of animal fats or vegetable oils and in particular the methyl esters of rapeseed oils.
- surfactant such as Actirob®B, Radiamix® or Vegestar® marketed by Novance®, Mero® marketed by Bayer®
- an adjuvant based on ethyl esters of sunflower oil and surfactants such as TRS2® marketed by SDP®
- an adjuvant based on soy lecithin and propionic acid such as Li- 700® marketed by Agridyne®
- an adjuvant based on ethoxylated fatty amine polymer and polysorbate 20 such as that Surf 2000® marketed by Jouffray-Drillaud JD®, polysorbate 20 such as Tween® 20 marketed by Croda®, an adjuvant based on ethoxylated triglycerides such as Can
- the adjuvant when it is an agriculturally acceptable adjuvant, it may comprise one or more agents such as an antifoam, antifreeze, a thickener, a wetting agent, a retentor, an anti-rebound, an anti-drifting agent or a stabilizer.
- agents such as an antifoam, antifreeze, a thickener, a wetting agent, a retentor, an anti-rebound, an anti-drifting agent or a stabilizer.
- a wetting agent is an adjuvant which lowers the surface tension of the water thus allowing the droplet to spread on the target by reducing the contact angle.
- an adjuvant By anti-rebound, an adjuvant aimed at a better grip of the sprayed droplets on the area to be treated at the moment of impact.
- an adjuvant aimed at not favoring the creation of droplets too fine ( ⁇ 100 - 150 ⁇ ) so as to obtain a better accuracy in the targeting of the sprayed product while minimizing losses in the environment or to neighboring cultures.
- the invention also relates to a preparation comprising a composition according to the invention and water, and to a process for obtaining the preparation by emulsion, dispersion or dilution of a composition according to the invention in the water.
- composition according to the invention may be formulated in the form of a concentrate to be diluted in, dispersed in or emulsified with water to obtain a preparation, which is then ready for use, that is to say, adapted to the application on a plant.
- a concentrate is generally in liquid form (solution, emulsion or suspension), in gel form or in solid form (such as a powder, granules, a film).
- a concentrate is preferably emulsifiable or dispersible in water.
- the preparation may be in the form of a solution, an emulsion or a suspension.
- the preparation is in the form of a spray emulsion.
- Such a formulation allows a distribution of fungicides and / or algicides homogeneously on the area to be treated during the application.
- the preparation according to the invention is usable as a fungicide and / or algicide, in a preventive and / or curative manner.
- compositions and preparations according to the invention can be used to control an organism of the family Pythiaceae and / or a disease caused by it, more particularly, Pythium and / or Phytophthora, preferentially Phytophthora infestans and / or or Pythium sp ..
- the invention also discloses a fungicidal and / or algicidal composition for controlling an organism of the family Pythiaceae and / or a disease caused by it comprising an alcohol having 7 to 9 carbon atoms. More particularly, the fungicidal and / or algicidal composition is capable of controlling Pythium and / or Phytophtora, preferably Phytophthora infestans and / or Pythium sp.
- the fungicidal and / or algicidal composition may have one or more of the characteristics of the compositions described above. before.
- the fungicidal and / or algicidal composition for controlling an organism of the family Pythiaceae and / or a disease caused by it comprises a single active substance which consists of octanol. octan-2- ⁇ and / or 2-ethylhexanol, preferably octanol.
- the invention also relates to methods of controlling an organism of the family Pythiaceae and / or a disease caused thereby.
- a plant to be treated is contacted with an effective amount of a fungicide and / or algicide according to the invention or a composition or preparation according to the invention.
- Effective amount means an amount necessary and sufficient to control the organism and / or the disease caused by it. We also commonly speak of dose.
- the effective amount of an active substance may vary depending on the humidity and the temperature.
- the person skilled in the art knows how to determine by simple experimentation the quantity necessary to fight against the organism, such as a fungus and / or seaweed, or against the disease caused by it.
- the soil to be treated is brought into contact with an effective amount of a fungicide and / or algicide according to the invention or a composition or preparation according to the invention.
- a soil treatment may comprise the incorporation of the fungicide and / or algicide according to the invention, of the composition according to the invention or of the preparation according to the invention, in the soil before the sowing, transplanting is carried out. in nursery or potting, or alternatively after cultivation.
- the processes according to the invention are more particularly suitable for treating a plant and / or a soil intended to receive plants in the context of vegetable crops, ornamental crops, tropical crops, oleaginous crops, fruit crops and / or cereal crops as described above.
- the treatments can be carried out as a preventive and / or curative, preferably by spraying.
- Spraying is carried out on the aerial parts of a plant, such as leaves, stems, fruits, flowers, ears, buds and / or on the soil to be treated, including parts of a plant in contact with the plant. soil, such as snares, roots, tubers, seeds.
- soil such as snares, roots, tubers, seeds.
- it may be a preventive treatment by spraying the soil and / or collar.
- a dose of 0.2 to 10 L / ha of an alcohol having 7 to 9 carbon atoms is applied.
- the treatments are intended to combat an organism of the family Pythiaceae and / or a disease caused by it, more particularly, Pythium and / or Phytophtora, preferably Phytophthora infestans and / or Pythium sp ..
- Diseases caused by Phytophthora infestans and / or Pythium are for example seedling fonts, root rots, collar rots and / or mildew.
- FIG. 1 a graph illustrating the efficiency results of octanol as a function of its concentration on a resistant strain of Pythium sp.
- Example 1 Sensitivity / n / fro of a resistant strain of Pythium sp.
- the strain was isolated from chicory roots. It is very resistant to fungicidal substances belonging to the phenylamide and Qol families. 4 ml of sterile distilled water are placed in a petri dish. Sporocysts are added and following a temperature shock, they release the zoospores. After 24 hours, the spores released into the water are suspended in a PDL medium ("Pea Dextrose Liquid”), doubly concentrated. The spore concentration is adjusted to 500 spores / mL.
- spore suspension 100 ⁇ l of the spore suspension at 500 spores / ml are added to 100 ⁇ l of a mixture containing distilled water, a quantity of octanol varying according to the desired concentration described below, and absolute ethanol which has a final constant concentration of 0.5% (v / v).
- the octanol is first diluted in absolute ethanol to obtain the following concentrations: 0.000512 - 0.00256 - 0.0128 - 0.064 - 0.32 - 1, 6 and 8 ⁇ g / mL.
- Octanol is very effective against the resistant Pythium sp. Strain.
- the EC 50 calculated for octanol is equivalent to a concentration of 0.0013 pg of active substance / ml.
- Example 2 In vitro sensitivity of a strain of Phytophthora infestans
- the strain was isolated from potato leaves. It is sensitive to all fungicidal substances used to control potato late blight.
- Octanol is very effective against Phytophthora infestans.
- the EC 50 calculated for the octanol is equivalent to a concentration of 0.0027 ⁇ g active substance / ml.
- the strain was isolated from potato leaves as before.
- Example 2 The same protocol as that described in Example 1 was carried out with sporocysts of Phytophthora infestans, with the exception of the spore concentration which was adjusted to 2 ⁇ 10 4 spores / ml and the incubation period brought to 5 days.
- 2-Ethyl hexanol was previously diluted in absolute ethanol to give the following different concentrations: 0.000512 - 0.00256 - 0.0128 - 0.064 - 0.32 - 1, 6 and 8 pmg / L.
- 2-Ethyl hexanol is effective against Phytophthora infestans.
- the EC 50 calculated for 2-ethyl hexanol is equivalent to a concentration of 0.0068 ⁇ g active substance / mL.
- Example 4 Susceptibility, mp &mt
- Octanol was mixed with sterile distilled water and Actirob B® marketed by Novance® (Actirob B is an emulsion in water at 842 g / l of rapeseed oil methyl esters at 2L / ha) to obtain compositions at the following octanol doses: 0 - 0.5 - 1, 0 - 3.0 and 6.0 L / ha.
- Young potato leaves were collected and their surface disinfected. 12 mm discs were cut through a cork borer under a laminar airflow. Each is randomized and placed in petri dishes so that the bottom of the leaves are in contact with the sterile filter paper moistened with 3 mL of distilled water.
- the different formulations containing the active substance or distilled water, which serves as a control, are applied to the disc-shaped sheets by spraying with the aid of a gun at a pressure of 2 bars.
- the amount sprayed corresponds to the equivalent of 300L / ha, For each condition, 2 repetitions of 6 disks each are carried out.
- Petri dishes containing V8 Juice - CaC0 3 - agar medium are seeded with a mycelium colony of the Phytophthora infestans strain.
- the Petri dishes are then incubated at 19 ° C in the dark for 2 to 3 weeks.
- 4 ml of sterile distilled water are introduced into each Petri dish and the spores are dislodged with a spatula and filtered through sterile Myracloth.
- the suspension is adjusted to 2x10 5 spores / ml in sterile cold distilled water.
- the potato leaf disks treated or untreated are inoculated with 20 ⁇ l of the previously prepared Phytophthora infestans spore suspension.
- the Each value corresponds to the average of 12 observations per treatment.
- octanol used at concentrations of 3 and 6 l / ha greatly reduces the potato leaf infection intensity caused by Phytophthora infestans inoculated after 5 days of incubation.
- Octanol thus has a preventive effect.
- Octanol controls the proliferation of Phytophthora infestans organisms in the potato.
- Example 5 In planta sensitivity of urte strain of Phytophtora in festans - Curative treatment (simultaneous inoculation of Phytophthora infestans and the fungicide)
- 0.5 ml of the spore suspension is mixed with 0.5 ml of each of the preparations containing the active substance or 0.5 ml of distilled water or 0.5 ml of distilled water in the presence of Actirob B ® at 2 L / ha.
- the Petri dishes are placed in an incubator at 23 ° C, at a relative humidity of 100%, with alternating periods of 12 hours of light and 12 hours of darkness.
- Each value corresponds to an average of 12 observations per treatment.
- octanol is applied at the same time as Phytophthora infestans to the surface of potato leaves, this substance completely inhibits the development of this pathogen whatever the incubation time (5 or 7 days) and the dose used ( 0.5 - 1 - 3 - 6 LJha).
- Octanol thus has a healing effect, killing the organism Phytophthora infestans of the potato.
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Abstract
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1454027A FR3020557B1 (fr) | 2014-05-02 | 2014-05-02 | Utilisation d'alcool(s) comme fongicide et/ou algicide |
PCT/FR2015/051167 WO2015166192A1 (fr) | 2014-05-02 | 2015-04-30 | Utilisation d'alcool(s) comme fongicide et/ou algicide |
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EP3136853A1 true EP3136853A1 (fr) | 2017-03-08 |
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EP15759833.5A Withdrawn EP3136853A1 (fr) | 2014-05-02 | 2015-04-30 | Utilisation d'alcool(s) comme fongicide et/ou algicide |
Country Status (6)
Country | Link |
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US (1) | US20170049100A1 (fr) |
EP (1) | EP3136853A1 (fr) |
AU (1) | AU2015255110A1 (fr) |
CA (1) | CA2946959A1 (fr) |
FR (1) | FR3020557B1 (fr) |
WO (1) | WO2015166192A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US3778509A (en) * | 1971-05-28 | 1973-12-11 | Cotton Inc | Control of fungi on cotton plants |
US3743747A (en) * | 1971-06-14 | 1973-07-03 | Mobil Oil Corp | Oxo-derivatives of limonene and dipentene used as fungicides |
GB1480211A (en) | 1973-07-06 | 1977-07-20 | Ici Ltd | Process for combating fungi |
JPS6048903A (ja) * | 1983-08-29 | 1985-03-16 | Kanesho Kk | 土壤殺菌剤 |
DE19940283A1 (de) * | 1999-08-25 | 2001-03-01 | Joerg Peter Schuer | Pflanzenschutz |
ES2357389B1 (es) * | 2011-03-11 | 2011-09-26 | Biofungitek, Sociedad Limitada | Composición fungicida y bactericida que comprende compuestos orgánicos volátiles de origen natural. |
-
2014
- 2014-05-02 FR FR1454027A patent/FR3020557B1/fr active Active
-
2015
- 2015-04-30 CA CA2946959A patent/CA2946959A1/fr not_active Abandoned
- 2015-04-30 US US15/308,307 patent/US20170049100A1/en not_active Abandoned
- 2015-04-30 AU AU2015255110A patent/AU2015255110A1/en not_active Abandoned
- 2015-04-30 EP EP15759833.5A patent/EP3136853A1/fr not_active Withdrawn
- 2015-04-30 WO PCT/FR2015/051167 patent/WO2015166192A1/fr active Application Filing
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See references of WO2015166192A1 * |
Also Published As
Publication number | Publication date |
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AU2015255110A1 (en) | 2016-11-24 |
FR3020557B1 (fr) | 2017-10-13 |
US20170049100A1 (en) | 2017-02-23 |
FR3020557A1 (fr) | 2015-11-06 |
CA2946959A1 (fr) | 2015-11-05 |
WO2015166192A1 (fr) | 2015-11-05 |
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