WO2022258582A1 - New anti-sprouting method for bulbs and tubers using mono-and diglycerides of fatty acids - Google Patents

New anti-sprouting method for bulbs and tubers using mono-and diglycerides of fatty acids Download PDF

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Publication number
WO2022258582A1
WO2022258582A1 PCT/EP2022/065338 EP2022065338W WO2022258582A1 WO 2022258582 A1 WO2022258582 A1 WO 2022258582A1 EP 2022065338 W EP2022065338 W EP 2022065338W WO 2022258582 A1 WO2022258582 A1 WO 2022258582A1
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mono
fatty acids
composition
diglycerides
process according
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PCT/EP2022/065338
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French (fr)
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Alberto Sardo
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Xeda International
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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
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P21/00—Plant growth regulators

Definitions

  • TITLE NEW ANTI-GERMINATION PROCESS FOR BULBS AND TUBERS BY MEANS OF MONO- AND/OR DIGLYCERIDE OF FATTY ACIDS
  • the present invention relates to an anti-germination process for potatoes in particular.
  • potatoes or other tubers After the potatoes or other tubers have been harvested, they are kept at temperatures of the order of 20 to 30 C for about 10 days in order to harden their peridermal layer or "skin", then gradually cooled until their storage temperature which is about 10°C, generally between 7 and 10°C.
  • tubers During the first and second months after harvest, the tubers remain in a quiescent state and show little tendency to germinate.
  • tubers must be chemically treated in order to inhibit germination which would be responsible for harmful effects, such as a loss of fresh weight, a transformation of starch into sugars and a reduction in the quality of the tubers as well as a deterioration in their appearance.
  • the bulbs are normally kept at lower temperatures but this does not avoid the risk of germination, especially when returning them to room temperature.
  • One of the objectives of the present invention is to provide a process for the anti-germination treatment of bulbs and/or tubers by means of an active agent authorized at the food level.
  • E471 is a food additive composed of mono- and diglycerides of dietary fatty acids. It is widely used in food (for example in the production of bread and industrial pastries) because of its harmlessness. It serves as an emulsifier, gelling agent, antioxidant, dye carrier and coating agent. However, mono- and diglycerides of fatty acids exhibit high viscosity, which makes their application hard. In addition, their use as a coating agent for fruits is linked to their ability to inhibit gas exchange and thus slow down ripening.
  • bulb germination is a phenomenon independent of gas exchange, and their use for this purpose has not been considered.
  • the subject of the invention is a process for the anti-germination treatment of bulbs and tubers by means of a composition comprising one or more mono- or diglycerides of food fatty acids as active agent.
  • the method comprises the application of an anti-germination active agent consisting of one or more mono- or diglycerides of fatty acids.
  • anti-germinative active agent consisting of one or more mono- or diglycerides of fatty acids
  • CIPC 1,4 Dimethylnaphthalene
  • essential oils such as clove oil, spearmint oil, peppermint oil, orange juice and their constituents, such as eugenol, l-carvone, menthone, menthol and limonene.
  • the method comprising the application, simultaneous, alternate or spread over time, of one or more anti-germination agents, such as the application of the composition comprising one or more mono- or diglycerides of food fatty acids as active agent and also including one or more anti-germination agents, or the application of comprising one or more mono- or diglyceride of food fatty acid as active agent and of an ancillary composition comprising a or more anti-germination agents.
  • one or more anti-germination agents such as the application of the composition comprising one or more mono- or diglycerides of food fatty acids as active agent and also including one or more anti-germination agents, or the application of comprising one or more mono- or diglyceride of food fatty acid as active agent and of an ancillary composition comprising a or more anti-germination agents.
  • composition can be applied by methods conventionally used in the field, in particular during the storage of bulbs and tubers in a cold room. Mention may thus be made of application by thermal fogging, sprinkling, ultra-low volume (or Ultra Low Volume, ULV) spraying in particular.
  • said mono- and diglycerides of dietary fatty acids may be chosen in particular from mono- or di-laurate, -myristate, -palmitate, -stearate or -glycerol oleate, and mixtures thereof, and more particularly glycerol mono- and di-oleate, and mixtures thereof. Mention may more particularly be made of E471.
  • E471 is commercially available.
  • the composition can be an organic solution or an aqueous dispersion.
  • said composition is a solution of mono- or diglycerides of pure food fatty acid, or an organic solution comprising one or more mono- or diglycerides of food fatty acid and one or more solvents and optionally one or more several emulsifiers.
  • composition in the form of an organic solution can comprise:
  • said solvent is chosen from a food-acceptable solvent, having a boiling point of between 150 and 260°C.
  • said coating composition may comprise several solvents, it being understood that at least one of said solvents has a boiling point of between 150 and 260°C.
  • the solvent(s) is (are) chosen in particular from essential oils or one of their constituents, in particular terpene constituents, light or higher alcohols, esters and esters of food fatty acids. , glycols, such as ethanol, monopropylene glycol in particular.
  • the coating composition may additionally comprise ethanol, for example in the amount of 0 to 30% (by weight of the composition).
  • the composition is in particular suitable for the application of said organic solution by thermal fogging, typically at a temperature between between 180°C and 350°C, in particular between 250°C and 350°C.
  • the method then comprises the application of the aerosol of said composition thus obtained.
  • Thermal fogging is understood to mean a process consisting in applying an extremely fine mist (whose droplets have a size of the order of a micrometer), which is produced by injecting a liquid into a current of hot air, which serves as a vehicle to said treating composition.
  • the mist thus produced allows a homogeneous application.
  • the thermal fogging can advantageously be implemented by using a thermal fogging machine, as described in FR 87 04 960, and more particularly by means of the ELECTROFOG® device marketed by the company XEDA INTERNATIONAL.
  • the thermal fogger typically consists of a high-pressure fan, an electrical resistor and a volumetric pump guaranteeing strict regularity of the characteristics of the fog produced and a very gradual introduction of the treatment composition into the storage chamber.
  • the conditions making it possible to obtain a drop size of 0.5 to 10 microns, in particular of the order of a micron, characteristic of a thermal fogging mist include heating the air to a temperature of 400 ° at 650°C before the injection of the liquid.
  • the application by thermal fogging can be continuous or intermittent during the storage period.
  • the application is carried out in the storage enclosure before filling or repeated, approximately every two months.
  • the thermal fogging temperature is between 260 and
  • thermal fogging temperature means the temperature of the mist at the outlet of the thermal fogging device.
  • this themonebulization temperature is distinct from the temperature of heating of the air by the thermal fogger before the injection of the liquid.
  • the composition is also suitable for application by ULV spraying.
  • very small quantities of treating composition are sprayed, typically less than 2L of dilute solution (containing between 0.5 and 10% of active principle) per tonne of bulbs and tubers.
  • the spraying can be carried out with ultra low volume spraying equipment, such as a rotating disc ("ultra low volume spininng say applicator” such as the fine ULV sprayer marketed by Mafex) or with high pressure atomizing nozzles ("high pressure atomizing nozzles”).
  • ultra low volume spraying equipment such as a rotating disc (“ultra low volume spininng say applicator” such as the fine ULV sprayer marketed by Mafex) or with high pressure atomizing nozzles (“high pressure atomizing nozzles”).
  • said composition is an aqueous dispersion of mono- or diglyceride(s) of dietary fatty acid(s) in water.
  • it may optionally comprise one or more solvents and/or optionally one or more emulsifiers.
  • the aqueous composition is suitable for application by sprinkling, showering or immersion of bulbs or tubers with said aqueous dispersion.
  • the quantity of product applied depends on the quantity of bulbs and tubers to be treated, as well as the storage conditions and their degree of maturity during storage and/or desired.
  • the method according to the invention comprises the application of 10 to 500 g of active agent per ton of tubers treated, preferably between 20 and 100 g/ton.
  • said emulsifiers which may be present may be chosen in particular from TweensTM, SpansTM, alcohols, sodium or potassium salts with fatty acids, ethoxylated fatty acids and mixtures thereof. According to one or the other of the alternatives, it has been demonstrated that despite the difficulties in applying the mono- and diglycerides of fatty acids, the process confers a homogeneous coating.
  • said coating composition may comprise one or more additional ingredients such as the additives usually used, in particular for the treatment of bulbs and tubers.
  • the treatment can be carried out post-harvest, before placing in the storage chamber or in the storage chamber, such as a cold room.
  • the application of said composition can be done on the bulbs and tubers stored in crates or pallets, or preferably stored outside the crates or pallets, before they are marketed.
  • Figure 1 presents the results obtained for the efficacy tests carried out according to the examples below.
  • Tests were carried out on potatoes of the Amandine variety, according to the following procedure: 6 treating solutions were prepared using the same method described above. The active principle was diluted in the solvent mixture so that after the spraying of the solutions on the tubers the residue of active principle was 0 for the control, 5g/T-10g/T-20g/T-30g/ T-60g/T and 80g/T (expressed in g of residue of active principle per ton of potatoes).
  • the potatoes thus coated were then stored at room temperature for 12 days.

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  • Life Sciences & Earth Sciences (AREA)
  • Plant Pathology (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Pest Control & Pesticides (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Botany (AREA)
  • Agronomy & Crop Science (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Cultivation Of Plants (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)

Abstract

The present invention relates to an anti-sprouting treatment for bulbs and tubers, using one or more mono-and diglycerides of dietary fatty acids.

Description

DESCRIPTION DESCRIPTION
TITRE : NOUVEAU PROCEDE ANTIGERMINATIF DES BULBES ET TUBERCULES AU MOYEN DE MONO- ET/OU DIGLYCERIDE D’ACIDES GRAS TITLE: NEW ANTI-GERMINATION PROCESS FOR BULBS AND TUBERS BY MEANS OF MONO- AND/OR DIGLYCERIDE OF FATTY ACIDS
La présente invention concerne un procédé antigerminatif de pommes de terre notamment. The present invention relates to an anti-germination process for potatoes in particular.
Après la récolte des pommes de terre ou autres tubercules, celles-ci sont conservées à des températures de l'ordre de 20 à 30 C pendant environ 10 jours afin de durcir leur couche péridermique ou "peau", puis progressivement refroidies jusqu'à leur température de conservation qui est d'environ 10°C, généralement entre 7 et 10°C. After the potatoes or other tubers have been harvested, they are kept at temperatures of the order of 20 to 30 C for about 10 days in order to harden their peridermal layer or "skin", then gradually cooled until their storage temperature which is about 10°C, generally between 7 and 10°C.
Pendant les premier et deuxième mois suivant leur récolte, les tubercules restent à l'état de repos et présentent peu de tendance à la germination. During the first and second months after harvest, the tubers remain in a quiescent state and show little tendency to germinate.
Cependant, avant la fin de cette période, les tubercules doivent être traitées chimiquement afin d'inhiber la germination qui serait responsable d'effets néfastes, tels qu'une perte de poids frais, une transformation de l'amidon en sucres et une diminution de la qualité des tubercules ainsi qu'une détérioration de leur apparence. However, before the end of this period, the tubers must be chemically treated in order to inhibit germination which would be responsible for harmful effects, such as a loss of fresh weight, a transformation of starch into sugars and a reduction in the quality of the tubers as well as a deterioration in their appearance.
Les bulbes sont normalement gardés à des températures plus basses mais cela n’évite pas les risques de germination surtout lors de leur remise à température ambiante. The bulbs are normally kept at lower temperatures but this does not avoid the risk of germination, especially when returning them to room temperature.
Les procédés de traitement anti-germinatifs les plus utilisés mettent en œuvre des agents chimiques tels que le chloropopham (CIPC 1 -méthyléthyl-3- chlorophénylcarbamate). Ces agents chimiques présentent des risques de toxicité élevés pour le consommateur, de sorte que les doses homologuées sont constamment réduites. De ce fait, la recherche s'est essentiellement portée sur la mise au point de produits alternatifs, tels que les produits d’origine naturelle par exemple. The most widely used anti-germination treatment methods use chemical agents such as chloropopham (CIPC 1-methylethyl-3-chlorophenylcarbamate). These chemical agents present high toxicity risks for the consumer, so the approved doses are constantly reduced. As a result, research has essentially focused on the development of alternative products, such as products of natural origin for example.
Un des objectifs de la présente invention est de fournir un procédé de traitement antigerminatif de bulbes et/ou tubercules au moyen d’agent actif autorisé au niveau alimentaire. One of the objectives of the present invention is to provide a process for the anti-germination treatment of bulbs and/or tubers by means of an active agent authorized at the food level.
E471 est un additif alimentaire composé de mono- et diglycérides d'acides gras alimentaires. Il est largement utilisé dans l’alimentation (par exemple dans la production du pain et des viennoiseries industrielles) en raison de son innocuité. Il sert comme émulsifiant, gélifiant, antioxydant, support pour colorant et agent d'enrobage. Cependant, les mono- et diglycérides d'acides gras présentent une viscosité élevée, ce qui rend leur application difficile. De plus, leur utilisation comme agent d’enrobage des fruits est liée à leur capacité à inhiber les échanges gazeux et ainsi à freiner le mûrissement. E471 is a food additive composed of mono- and diglycerides of dietary fatty acids. It is widely used in food (for example in the production of bread and industrial pastries) because of its harmlessness. It serves as an emulsifier, gelling agent, antioxidant, dye carrier and coating agent. However, mono- and diglycerides of fatty acids exhibit high viscosity, which makes their application hard. In addition, their use as a coating agent for fruits is linked to their ability to inhibit gas exchange and thus slow down ripening.
Or la germination des bulbes est un phénomène indépendant des échanges gazeux, et leur utilisation à cette fin n’a aucunement été envisagée. However, bulb germination is a phenomenon independent of gas exchange, and their use for this purpose has not been considered.
Il a désormais été découvert de façon surprenante l’activité antigerminative de ces additifs. The anti-germination activity of these additives has now been surprisingly discovered.
Ainsi, l’invention a pour objet un procédé de traitement antigerminatif des bulbes et tubercules au moyen d’une composition comprenant un ou plusieurs mono- ou diglycéride d'acide gras alimentaire à titre d’agent actif. Thus, the subject of the invention is a process for the anti-germination treatment of bulbs and tubers by means of a composition comprising one or more mono- or diglycerides of food fatty acids as active agent.
Selon une première variante, le procédé comprend l’application d’agent actif antigerminatif consistant en un ou plusieurs mono- ou diglycérides d'acides gras. According to a first variant, the method comprises the application of an anti-germination active agent consisting of one or more mono- or diglycerides of fatty acids.
L’expression « d’agent actif antigerminatif consistant en un ou plusieurs mono- ou diglycérides d'acides gras » vise l’application un ou plusieurs mono- ou diglycérides d'acides gras en tant que seul agent présentant une activité antigerminative et exclut de fait l’application de combinaisons d’un ou plusieurs mono- ou diglycérides d'acides gras et d’un ou plusieurs autres agents antigerminatifs. The expression "anti-germinative active agent consisting of one or more mono- or diglycerides of fatty acids" refers to the application of one or more mono- or diglycerides of fatty acids as the sole agent exhibiting anti-germinative activity and excludes from applies combinations of one or more fatty acid mono- or diglycerides and one or more other anti-germination agents.
Parmi les agents antigerminatifs classiques, on peut notamment citer le CIPC, le 1 ,4 Diméthylnaphtalène (DMN) et les huiles essentielles telles que l’huile de girofle, l’huile de menthe verte, l’huile de menthe poivrée, l’huile d’orange et leurs constituants, tels que l’eugénol, la l-carvone, menthone, menthol et limonène. Among the conventional anti-germination agents, mention may in particular be made of CIPC, 1,4 Dimethylnaphthalene (DMN) and essential oils such as clove oil, spearmint oil, peppermint oil, orange juice and their constituents, such as eugenol, l-carvone, menthone, menthol and limonene.
Selon une autre variante, le procédé comprenant l’application, simultanée, alternée ou étalée dans le temps d’un ou plusieurs agents anti-germinatifs tel que l’application de la composition comprenant un ou plusieurs mono- ou diglycéride d'acide gras alimentaire à titre d’agent actif et incluant également un ou plusieurs agents anti-germinatifs, ou l’application de la comprenant un ou plusieurs mono- ou diglycéride d'acide gras alimentaire à titre d’agent actif et d’une composition annexe comprenant un ou plusieurs agents antigerminatifs. According to another variant, the method comprising the application, simultaneous, alternate or spread over time, of one or more anti-germination agents, such as the application of the composition comprising one or more mono- or diglycerides of food fatty acids as active agent and also including one or more anti-germination agents, or the application of comprising one or more mono- or diglyceride of food fatty acid as active agent and of an ancillary composition comprising a or more anti-germination agents.
Ladite composition peut être appliquée par des méthodes classiquement utilisées dans le domaine, notamment lors du stockage des bulbes et tubercules en chambre froide. On peut ainsi citer l’application par thermonébulisation, aspersion, pulvérisation ultra-bas volume (ou Ultra Low Volume, ULV) notamment. Selon un mode de réalisation, lesdits mono- et diglycérides d'acides gras alimentaires peuvent être notamment choisis parmi les mono- ou di-laurate, -myristate, - palmitate, -stéarate ou -oléate de glycérol, et leurs mélanges, et plus particulièrmeent les mono- et di-oléate de glycérol, et leurs mélanges. On peut plus particulièrement citer E471 . Il est obtenu par hydrolyse, soit à partir de graisses et produits animaux (panses de bœuf, cornes, lard, suif, ...) soit à partir d'huiles végétales (huile de palme, soja, olive, graines de coton, colza, tournesol, ...). E471 est disponible commercialement. Said composition can be applied by methods conventionally used in the field, in particular during the storage of bulbs and tubers in a cold room. Mention may thus be made of application by thermal fogging, sprinkling, ultra-low volume (or Ultra Low Volume, ULV) spraying in particular. According to one embodiment, said mono- and diglycerides of dietary fatty acids may be chosen in particular from mono- or di-laurate, -myristate, -palmitate, -stearate or -glycerol oleate, and mixtures thereof, and more particularly glycerol mono- and di-oleate, and mixtures thereof. Mention may more particularly be made of E471. It is obtained by hydrolysis, either from animal fats and products (beef stomachs, horns, lard, tallow, etc.) or from vegetable oils (palm oil, soya, olive, cottonseed, rapeseed , sunflower, ...). E471 is commercially available.
La composition peut être une solution organique ou une dispersion aqueuse. The composition can be an organic solution or an aqueous dispersion.
Ainsi, selon une première alternative, ladite composition est une solution de mono- ou diglycérides d'acide gras alimentaires pur, ou une solution organique comprenant un ou plusieurs mono- ou diglycérides d'acide gras alimentaires et un ou plusieurs solvants et éventuellement un ou plusieurs émulsifiants. Thus, according to a first alternative, said composition is a solution of mono- or diglycerides of pure food fatty acid, or an organic solution comprising one or more mono- or diglycerides of food fatty acid and one or more solvents and optionally one or more several emulsifiers.
Typiquement, la composition sous forme de solution organique peut comprendre :Typically, the composition in the form of an organic solution can comprise:
- entre 5 et 100% en poids de mono- et diglycérides d'acides gras alimentaires, et éventuellement - between 5 and 100% by weight of mono- and diglycerides of dietary fatty acids, and optionally
- entre 0 et 95% en poids de solvant. - between 0 and 95% by weight of solvent.
Selon un mode de réalisation, ledit solvant est choisi parmi un solvant acceptable sur le plan alimentaire, ayant une température d’ébullition comprise entre 150 et 260°C. According to one embodiment, said solvent is chosen from a food-acceptable solvent, having a boiling point of between 150 and 260°C.
On peut notamment citer le monopropylène glycol. Mention may in particular be made of monopropylene glycol.
Il est précisé ici que ladite composition d’enrobage peut comprendre plusieurs solvants, étant entendu qu’au moins un desdits solvants a une température d’ébullition comprise entre 150 et 260°C. It is specified here that said coating composition may comprise several solvents, it being understood that at least one of said solvents has a boiling point of between 150 and 260°C.
Selon un mode de réalisation, le(s) solvant(s) est(sont) choisis notamment parmi les huiles essentielles ou un de leurs constituants notamment les constituants terpèniques, les alcools légers ou supérieurs, les esters et les esters d’acides gras alimentaires, les glycols, tels que l’éthanol le monopropylène glycol notamment. According to one embodiment, the solvent(s) is (are) chosen in particular from essential oils or one of their constituents, in particular terpene constituents, light or higher alcohols, esters and esters of food fatty acids. , glycols, such as ethanol, monopropylene glycol in particular.
Ainsi, selon un mode de réalisation avantageux, la composition d’enrobage peut en outre comprendre de l’éthanol, par exemple à hauteur de 0 à 30 % (en poids de la composition). Thus, according to an advantageous embodiment, the coating composition may additionally comprise ethanol, for example in the amount of 0 to 30% (by weight of the composition).
Selon cette alternative, la composition est notamment appropriée pour l’application de ladite solution organique par thermonébulisation, typiquement à température comprise entre 180°C et 350°C, notamment entre 250°C et 350°C. Le procédé comprend alors l’application de l’aérosol de ladite composition ainsi obtenu. According to this alternative, the composition is in particular suitable for the application of said organic solution by thermal fogging, typically at a temperature between between 180°C and 350°C, in particular between 250°C and 350°C. The method then comprises the application of the aerosol of said composition thus obtained.
Il a ainsi été mis en évidence que malgré les difficultés à appliquer les mono- et diglycérides d'acides gras, ce procédé permet d’obtenir un aérosol de bonne qualité, en formant une brume très fine correspondant à une taille de particules inférieure ou égale 10 microns environ qui confère un enrobage particulièrement homogène. It has thus been demonstrated that despite the difficulties in applying mono- and diglycerides of fatty acids, this process makes it possible to obtain a good quality aerosol, by forming a very fine mist corresponding to a particle size less than or equal to 10 microns approximately which gives a particularly homogeneous coating.
On entend par thermonébulisation, un procédé consistant à appliquer un brouillard extrêmement fin (dont les gouttelettes ont une taille de l'ordre du micromètre), lequel est produit par injection d'un liquide dans un courant d'air chaud, qui sert de véhicule à ladite composition traitante. Le brouillard ainsi produit permet une application homogène. Thermal fogging is understood to mean a process consisting in applying an extremely fine mist (whose droplets have a size of the order of a micrometer), which is produced by injecting a liquid into a current of hot air, which serves as a vehicle to said treating composition. The mist thus produced allows a homogeneous application.
Cette technique est connue en soi et est décrite dans les demandes FR 98015305 et FR 99 04534. This technique is known per se and is described in applications FR 98015305 and FR 99 04534.
La thermonébulisation pourra avantageusement être mise en oeuvre par utilisation d'un thermonébulisateur, tel que décrit dans FR 87 04 960, et plus particulièrement au moyen de l’appareil ELECTROFOG® commercialisé par la société XEDA INTERNATIONAL. The thermal fogging can advantageously be implemented by using a thermal fogging machine, as described in FR 87 04 960, and more particularly by means of the ELECTROFOG® device marketed by the company XEDA INTERNATIONAL.
Le thermonébulisateur est typiquement constitué d'un ventilateur haute pression, d'une résistance électrique et d'une pompe volumétrique garantissant une régularité stricte des caractéristiques du brouillard produit et une introduction très progressive de la composition traitante dans la chambre de stockage. The thermal fogger typically consists of a high-pressure fan, an electrical resistor and a volumetric pump guaranteeing strict regularity of the characteristics of the fog produced and a very gradual introduction of the treatment composition into the storage chamber.
De manière classique, les conditions permettant d'obtenir une taille de gouttes de 0,5 à 10 microns, notamment de l'ordre du micron, caractéristiques d'un brouillard de thermonébulisation, comprennent le chauffage de l'air à une température de 400° à 650°C avant l'injection du liquide. Conventionally, the conditions making it possible to obtain a drop size of 0.5 to 10 microns, in particular of the order of a micron, characteristic of a thermal fogging mist, include heating the air to a temperature of 400 ° at 650°C before the injection of the liquid.
L'application par thermonébulisation peut être continue ou intermittente au cours de la durée du stockage. De préférence, l'application est réalisée dans l'enceinte de stockage avant le remplissage ou répétée, tous les deux mois environ. The application by thermal fogging can be continuous or intermittent during the storage period. Preferably, the application is carried out in the storage enclosure before filling or repeated, approximately every two months.
Néanmoins, dans ces conditions de températures de travail habituelles des thermonébulisateurs (typiquement comprises entre 110 et 200 °C, voire 240°C), il a été identifié que les mono- et diglycérides d'acides gras ne peuvent être nébulisés de façon satisfaisante. Nevertheless, under these usual working temperature conditions of thermal foggers (typically between 110 and 200° C., or even 240° C.), it has been identified that the mono- and diglycerides of fatty acids cannot be nebulized in a satisfactory manner.
Il n’avait encore jamais été envisagé de conduire des traitements de fruits et légumes avec des températures de nébulisation supérieures à 250°C. De préférence, la température de thermonébulisation est comprise entre 260 etIt had never before been envisaged to carry out fruit and vegetable treatments with nebulization temperatures above 250°C. Preferably, the thermal fogging temperature is between 260 and
300°C. 300°C.
On entend ici par température de thermonébulisation la température du brouillard à la sortie de l'appareil de thermonébulisation. Here, thermal fogging temperature means the temperature of the mist at the outlet of the thermal fogging device.
Il est entendu que cette température de thémonébulisation est distincte de la température de chauffage de l’air par le thermonébulisateur avant l’injection du liquide. It is understood that this themonebulization temperature is distinct from the temperature of heating of the air by the thermal fogger before the injection of the liquid.
Selon cette première alternative, la composition est également appropriée pour l’application par pulvérisation ULV. Selon cette technique, de très faibles quantités de composition traitant sont pulvérisées, typiquement inférieures à 2L de solution diluée (contenant entre 0.5 et 10% de principe actif) par tonne de bulbes et tubercules. According to this first alternative, the composition is also suitable for application by ULV spraying. According to this technique, very small quantities of treating composition are sprayed, typically less than 2L of dilute solution (containing between 0.5 and 10% of active principle) per tonne of bulbs and tubers.
La pulvérisation peut être effectuée avec un appareillage de pulvérisation ultra bas volume, tel que à disque rotatif (« ultra low volume spininng dise applicator » tel que le pulvérisateur ULV fin commercialisé par Mafex) ou à buses d’atomisation à haute pression (« high pressure atomizing nozzles »).. The spraying can be carried out with ultra low volume spraying equipment, such as a rotating disc ("ultra low volume spininng say applicator" such as the fine ULV sprayer marketed by Mafex) or with high pressure atomizing nozzles ("high pressure atomizing nozzles”).
Selon une seconde alternative, ladite composition est une dispersion aqueuse de(s) mono- ou diglycéride(s) d'acide gras alimentaire(s) dans l’eau. According to a second alternative, said composition is an aqueous dispersion of mono- or diglyceride(s) of dietary fatty acid(s) in water.
Selon un mode de réalisation, elle peut comprendre éventuellement un ou plusieurs solvants et/ou éventuellement un ou plusieurs émulsifiants. According to one embodiment, it may optionally comprise one or more solvents and/or optionally one or more emulsifiers.
Selon cette seconde alternative, la composition aqueuse est appropriée pour l’application par aspersion, douchage ou immersion des bulbes ou tubercules avec ladite dispersion aqueuse. According to this second alternative, the aqueous composition is suitable for application by sprinkling, showering or immersion of bulbs or tubers with said aqueous dispersion.
Selon l’une ou l’autre des alternatives et sauf mention contraire, la quantité de produit appliqué dépend de la quantité des bulbes et tubercules à traiter, ainsi que des conditions de stockage et leur degré de maturité en cours de stockage et/ou souhaité. Typiquement, le procédé selon l’invention comprend l’application de 10 à 500 g d’agent actif par tonne de tubercules traités, de préférence entre 20 et 100 g/tonne. According to one or other of the alternatives and unless otherwise stated, the quantity of product applied depends on the quantity of bulbs and tubers to be treated, as well as the storage conditions and their degree of maturity during storage and/or desired. . Typically, the method according to the invention comprises the application of 10 to 500 g of active agent per ton of tubers treated, preferably between 20 and 100 g/ton.
Selon l’une ou l’autre des alternatives, lesdits émulsifiants éventuellement présents peuvent être notamment choisis parmi les Tweens™, les Spans™, les alcools, les sels de sodium ou potassium avec les acides gras, les acides gras éthoxylés et leurs mélanges. Selon l’une ou l’autre des alternatives, il a été mis en évidence que malgré les difficultés à appliquer les mono- et diglycérides d'acides gras, le procédé confère un enrobage homogène. According to one or other of the alternatives, said emulsifiers which may be present may be chosen in particular from Tweens™, Spans™, alcohols, sodium or potassium salts with fatty acids, ethoxylated fatty acids and mixtures thereof. According to one or the other of the alternatives, it has been demonstrated that despite the difficulties in applying the mono- and diglycerides of fatty acids, the process confers a homogeneous coating.
Selon un mode de réalisation, ladite composition d’enrobage peut comprendre un ou plusieurs ingrédients additionnels tels que les additifs habituellement utilisés, notamment pour le traitement des bulbes et tubercules. According to one embodiment, said coating composition may comprise one or more additional ingredients such as the additives usually used, in particular for the treatment of bulbs and tubers.
A titre de bulbes et tubercules, on peut notamment citer les pommes de terre. By way of bulbs and tubers, mention may in particular be made of potatoes.
Le traitement peut être réalisé en post-récolte, avant la mise en chambre de stockage ou dans la chambre de stockage, telle qu’une chambre froide. The treatment can be carried out post-harvest, before placing in the storage chamber or in the storage chamber, such as a cold room.
L'application de ladite composition peut se faire sur les bulbes et tubercules stockés en caisses ou palettes, ou de préférence stockés hors caisse ou palette, avant leur commercialisation. The application of said composition can be done on the bulbs and tubers stored in crates or pallets, or preferably stored outside the crates or pallets, before they are marketed.
Figures tricks
[Fig 1] La Figure 1 présente les résultats obtenus pour les essais d’efficacité réalisés selon les exemples ci-dessous. [Fig 1] Figure 1 presents the results obtained for the efficacy tests carried out according to the examples below.
Les exemples suivants sont donnés à titre illustratif et non limitatif de la présente invention. The following examples are given by way of non-limiting illustration of the present invention.
Exemples Examples
1 . Préparation d’une composition d’enrobage 1 . Preparation of a coating composition
Pour la préparation d’1kg de produit, à 400g de l’additif alimentaire E471 sont ajoutés 400g de solvant alimentaire de point d’ébullition compris entre 150 et 260°C, tel que le monopropylèneglycol de point d’ébullition 184°C et 200g d’alcool éthylique. For the preparation of 1kg of product, to 400g of food additive E471 are added 400g of food solvent with a boiling point between 150 and 260°C, such as monopropylene glycol with a boiling point of 184°C and 200g of ethyl alcohol.
2. Application et efficacité de la composition d’enrobage 2. Application and effectiveness of the coating composition
Des essais ont été réalisés sur des pommes de terre de la variété Amandine, selon la procédure suivante : 6 solutions traitantes ont été préparées suivant la même méthode ci-dessus décrite. Le principe actif a été dilué dans le mélange de solvant de sorte qu’après l’aspersion des solutions sur les tubercules le résidu de principe actif soit de 0 pour le témoin, 5g/T-10g/T- 20g/T-30g/T-60g/T et 80g/T (exprimé en g de résidu de principe actif par tonne de pommes de terre) . Tests were carried out on potatoes of the Amandine variety, according to the following procedure: 6 treating solutions were prepared using the same method described above. The active principle was diluted in the solvent mixture so that after the spraying of the solutions on the tubers the residue of active principle was 0 for the control, 5g/T-10g/T-20g/T-30g/ T-60g/T and 80g/T (expressed in g of residue of active principle per ton of potatoes).
Ces solutions traitantes ont été appliquées sur les tubercules au moyen d’une buse d’atomisation à haute pression. Une dose correspondant à 200mL de solution par tonne de tubercules a été utilisée. These treating solutions were applied to the tubers using a high pressure spray nozzle. A dose corresponding to 200mL of solution per tonne of tubers was used.
Les pommes de terre ainsi enrobées ont ensuite été conservées à température ambiante pendant 12 jours. The potatoes thus coated were then stored at room temperature for 12 days.
A l’issue de cette période, l’apparence des pommes de terre et notamment la présence et taille des germes présents ont été évalués. At the end of this period, the appearance of the potatoes and in particular the presence and size of the germs present were evaluated.
Résultats: Les résultats sont illustrés à la Figure 1 : Sur cette photographie, les pommes de terre traitées sont positionnées en colonne, selon le traitement et la dose de traitement qu’elles ont subis, comme suit (de gauche à droite) : 1ère colonne : témoin Results: The results are illustrated in Figure 1: In this photograph, the treated potatoes are positioned in a column, according to the treatment and the treatment dose they have undergone, as follows (from left to right): 1 st column: witness
2ème colonne : 5g/T de résidu de principe actif 3ème colonne : 10g/T de résidu de principe actif 4ème colonne : 20g/T de résidu de principe actif 5ème colonne : 30g/T de résidu de principe actif 6ème colonne : 60g/T de résidu de principe actif 7ème colonne : 80g/T de résidu de principe actif La taille des germes a été mesurée : elle est résumée pour chaque échantillon dans le tableau 1 : 2nd column: 5g/T of active ingredient residue 3rd column: 10g/T of active ingredient residue 4th column: 20g /T of active ingredient residue 5th column: 30g /T of active ingredient residue 6th column: 60g/T of active ingredient residue 7th column: 80g /T of active ingredient residue The size of the germs was measured: it is summarized for each sample in Table 1:
[Table 1]
Figure imgf000008_0001
[Table 1]
Figure imgf000008_0001

Claims

REVENDICATIONS
1. Procédé de traitement antigerminatif des bulbes et tubercules au moyen d’une composition comprenant un ou plusieurs mono- ou diglycéride d'acide gras alimentaire à titre d’agent actif. 1. Process for the anti-germination treatment of bulbs and tubers by means of a composition comprising one or more mono- or diglycerides of food fatty acids as active agent.
2. Procédé antigerminatif selon la revendication 1 tel que ladite composition est appliquée par thermonébulisation, aspersion, pulvérisation ultra-bas volume (ou Ultra Low Volume, ULV). 2. Anti-germination process according to claim 1 such that said composition is applied by thermal fogging, sprinkling, ultra-low volume spraying (or Ultra Low Volume, ULV).
3. Procédé antigerminatif selon la revendication 1 ou 2, tel que lesdits mono- et diglycérides d'acides gras alimentaires sont choisis parmi les mono- ou di-laurate, - myristate, -palmitate, -stéarate ou -oléate de glycérol, et leurs mélanges. 3. Anti-germination process according to claim 1 or 2, such that the said mono- and diglycerides of dietary fatty acids are chosen from mono- or di-laurate, - myristate, -palmitate, -stearate or -oleate of glycerol, and their mixtures.
4. Procédé antigerminatif selon l’une quelconque des revendications précédentes tel que lesdits mono- et diglycérides d'acides gras alimentaires sont choisis parmi les mono- et di-oléate de glycérol, et leurs mélanges. 4. Anti-germination process according to any one of the preceding claims, such that the said mono- and diglycerides of dietary fatty acids are chosen from glycerol mono- and di-oleate, and mixtures thereof.
5. Procédé antigerminatif selon l’une quelconque des revendications précédentes tel que ladite composition est une solution organique consistant en mono- ou diglycéride d'acide gras alimentaire ou une solution organique comprenant en outre un ou plusieurs solvants et éventuellement un ou plusieurs émulsifiants. 5. Anti-germination process according to any one of the preceding claims, such that the said composition is an organic solution consisting of mono- or diglyceride of a food fatty acid or an organic solution further comprising one or more solvents and optionally one or more emulsifiers.
6. Procédé selon la revendication 5 tel que le(s) solvant(s) est(sont) choisis parmi les huiles essentielles les substances terpéniques qui composent les huiles essentielles, les alcools légers ou supérieurs, les esters, les esters d’acides gras alimentaires, les glycols. 6. Process according to claim 5, such that the solvent(s) is (are) chosen from essential oils, terpene substances which make up essential oils, light or higher alcohols, esters, fatty acid esters food, glycols.
7. Procédé selon la revendication 6 tel que le(s) émulsifiant(s) est(sont) choisis parmi les Tweens™, les Spans™, les alcools, les sels de sodium ou potassium avec les acides gras, les acides gras éthoxylés et leurs mélanges. 7. Process according to claim 6, such that the emulsifier(s) is (are) chosen from Tweens™, Spans™, alcohols, sodium or potassium salts with fatty acids, ethoxylated fatty acids and their mixtures.
8. Procédé selon l’une quelconque des revendications 5 à 7 tel qu’il comprend 8. Method according to any one of claims 5 to 7 as it comprises
- la thermonébulisation de ladite solution organique à température comprise entre 180°C et 350°C l’application de l’aérosol de ladite composition ainsi obtenu. - thermal fogging of said organic solution at a temperature between 180°C and 350°C the application of the aerosol of said composition thus obtained.
9. Procédé selon l’une quelconque des revendications 5 à 7 tel qu’il comprend l’application de ladite solution organique par pulvérisation ULV. 9. A method according to any one of claims 5 to 7 such that it comprises the application of said organic solution by ULV spraying.
10. Procédé selon l’une quelconque des revendications 5 à 9, tel que la composition comprend : 10. Method according to any one of claims 5 to 9, such that the composition comprises:
- entre 5 et 100% en poids de mono- et diglycérides d'acides gras alimentaires, et éventuellement - between 5 and 100% by weight of mono- and diglycerides of dietary fatty acids, and optionally
- entre 0 et 95% en poids de solvant. - between 0 and 95% by weight of solvent.
11. Procédé antigerminatif selon l’une quelconque des revendications 1 à 4 tel que ladite composition est une dispersion aqueuse de(s) mono- ou diglycéride(s) d'acide gras alimentaire(s) dans l’eau, et éventuellement un ou plusieurs solvants et/ou éventuellement un ou plusieurs émulsifiants. 11. Anti-germination process according to any one of claims 1 to 4, such that said composition is an aqueous dispersion of mono- or diglyceride(s) of dietary fatty acid(s) in water, and optionally one or several solvents and/or optionally one or more emulsifiers.
12. Procédé selon la revendication 11 comprenant l’aspersion, douchage ou immersion des bulbes ou tubercules avec ladite dispersion aqueuse. 12. Method according to claim 11 comprising the sprinkling, showering or immersion of the bulbs or tubers with the said aqueous dispersion.
13. Procédé selon l’une quelconque des revendications précédentes comprenant l’application, simultanée, alternée ou étalée dans le temps d’un ou plusieurs agents anti-germinatifs tel que le CIPC, le 1 ,4 Diméthylnaphtalène (DMN) et les huiles essentielles telles que l’huile de girofle, l’huile de menthe verte, l’huile de menthe poivrée, l’huile d’orange et leurs constituants, tels que l’eugénol, l-carvone, menthone, menthol ou limonène. 13. Method according to any one of the preceding claims comprising the application, simultaneous, alternate or spread over time of one or more anti-germination agents such as CIPC, 1,4 Dimethylnaphthalene (DMN) and essential oils such as clove oil, spearmint oil, peppermint oil, orange oil and their constituents, such as eugenol, l-carvone, menthone, menthol or limonene.
14. Procédé selon l’une quelconque des revendications précédentes comprenant l’application de 10 à 500 g d’agent actif par tonne de tubercules traités, de préférence entre 20 et 100 g/tonne. 14. Process according to any one of the preceding claims, comprising the application of 10 to 500 g of active agent per tonne of tubers treated, preferably between 20 and 100 g/tonne.
15. Procédé selon l’une quelconque des revendications précédentes comprenant l’application dans une chambre de stockage. 15. A method according to any preceding claim comprising application to a storage chamber.
PCT/EP2022/065338 2021-06-07 2022-06-07 New anti-sprouting method for bulbs and tubers using mono-and diglycerides of fatty acids WO2022258582A1 (en)

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FR2105983A FR3123540B1 (en) 2021-06-07 2021-06-07 NEW PROCESS FOR ANTI-GERMINATION OF BULBS AND TUBERS BY MEANS OF MONO- AND/OR DIGLYCERIDE OF FATTY ACIDS

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1604570A2 (en) * 2004-06-11 2005-12-14 Luxan B.V. Sprout inhibitor for potatoes
EP3011834A1 (en) * 2014-10-20 2016-04-27 Agriphar S.A. Improved tuber storage
EP3127434A1 (en) * 2015-08-07 2017-02-08 Robertus Hasert The use of e471 as a coating agent for food ingredients and the method of preparation of e471 as a coating agent for food ingredients

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1604570A2 (en) * 2004-06-11 2005-12-14 Luxan B.V. Sprout inhibitor for potatoes
EP3011834A1 (en) * 2014-10-20 2016-04-27 Agriphar S.A. Improved tuber storage
EP3127434A1 (en) * 2015-08-07 2017-02-08 Robertus Hasert The use of e471 as a coating agent for food ingredients and the method of preparation of e471 as a coating agent for food ingredients

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