JP7386629B2 - Composition for covering plants, method for producing composition for covering plants, and method for covering plants - Google Patents

Description

The present invention relates to a composition for covering plants, a method for producing a composition for covering plants, and a method for covering plants.

The surfaces of plants such as fruits are coated with a coating agent for the purpose of retaining moisture and protecting them from dirt. Various coating materials have been proposed.

For example, Patent Document 1 describes a slow-drying fruit wax in which shellac, rosin, and other additives are added as solutes and dissolved using water and alcohol as solvents. This slow-drying fruit wax dries quickly and is said to have no ignitability.

Note that, for example, as described in Patent Document 2, fruit is cultivated by wrapping the fruit with a fruit bag during the growing period. However, when using fruit bags, it is not possible to check the fruit from the outside after bagging, and in order to check the growth status, it is necessary to remove the fruit from the bag and bag it again.

Japanese Unexamined Patent Publication No. 49-117641 Japanese Patent Application Publication No. 2015-134972

However, there is room for improvement in the workability of compositions for covering plants, and there is a need for even better plant protection performance. For example, in terms of workability, it is required to be able to easily apply or spray while preventing dripping, to be less sticky, and to be highly safe without igniting. Regarding plant protection performance, in addition to protecting plants from the outside air and sunlight, it is also required to improve ventilation so as not to impede the breathing of plants and to prevent insect damage.

The slow-drying fruit wax described in Patent Document 1 mentioned above has room for improvement in workability such as spreadability and plant protection performance.

The present invention was made in view of the above-mentioned problems, and it is possible to easily form a film containing oil on the surface of plants with excellent spreadability, and to form a film with good plant protection performance. An object of the present invention is to provide a composition for covering plants, a method for producing the composition for covering plants, and a method for covering plants.

As a result of intensive studies to solve the above problems, the present inventors have discovered an outer shell containing cellulose nanofibers and a substance-containing capsule containing an oil (C) contained in a space surrounded by the outer shell. The inventors have discovered that the above problems can be solved by a composition containing (X), and have completed the present invention.
That is, the present invention provides the following [1] to [14].
[1] A plant coating composition that is supplied to the surface of a plant and coats the surface of the plant,
comprising a substance-containing capsule (X) and an aqueous medium (B),
A composition for covering plants, wherein the substance-containing capsule (X) includes an outer shell containing cellulose nanofibers (A) and an oil (C) encapsulated in a space surrounded by the outer shell.
[2] The plant coating composition according to [1] above, wherein the oil component (C) contains at least one component selected from the group consisting of hydrocarbon oil components, natural animal and vegetable oils, and semi-synthetic oils and fats. .
[3] The plant coating composition according to [1] or [2] above, wherein the viscosity at 23° C. and 50 rpm is 500 to 20,000 mPa·s.
[4] Any one of [1] to [3] above, wherein the TI value (viscosity at a rotation speed of 5 rpm/viscosity at a rotation speed of 50 rpm) at 23° C. of the plant coating composition is 1.2 to 20. A composition for covering plants according to item 1.
[5] The composition for covering plants according to any one of [1] to [4] above, wherein the cellulose nanofibers (A) have an average diameter (thickness) of 1 to 1,000 nm.
[6] The composition for covering plants according to any one of [1] to [5] above, wherein the cellulose nanofibers (A) have an average fiber length of 0.01 to 10 μm.
[7] The plant coating composition according to any one of [1] to [6] above, wherein the content of the oil (C) based on the total mass of the plant coating composition is 0.05 to 80% by mass. Composition.
[8] The above [1], wherein the content ratio of the oil (C) and the aqueous medium (B) is (C):(B) = 1:0.1 to 1:1,000 in mass ratio. The composition for covering plants according to any one of [7].
[9] The composition for covering plants according to any one of [1] to [8] above, wherein the substance-containing capsule (X) has an average particle diameter of 1 to 60 μm.
[10] The plant according to any one of [1] to [9] above, wherein the content of the surfactant is less than 10 parts by mass based on 100 parts by mass of the total amount of cellulose nanofibers (A). Coating composition.
[11] A method for producing a plant coating composition according to any one of [1] to [10] above, comprising:
Adding oil (C) to a dispersion in which cellulose nanofibers (A) are dispersed in an aqueous medium (B),
The dispersion to which oil (C) has been added is stirred to form substance-containing capsules (X ) A method for producing a composition for covering plants.
[12] The oil (C) contains a solid oil that is solid at room temperature, the solid oil is dissolved in an organic material that is liquid at room temperature, and the organic material in which the solid oil is dissolved is added to the dispersion and stirred. The plant coating according to [11] above, wherein at least a part of the solid oil content is incorporated into the space surrounded by the outer shell of the cellulose nanofibers (A) to produce substance-containing capsules (X). A method for producing a composition for use.
[13] Supplying the plant coating composition according to any one of [1] to [10] above to the surface of a plant to coat the surface of the plant with the plant coating composition. Coating method.
[14] The method according to [13] above, wherein the plant coating composition supplied to the surface of the plant is dried to form a film of at least one of the cellulose nanofibers (A) and the oil (C) on the surface of the plant. How to cover plants.

Advantageous Effects of Invention According to the present invention, a composition for coating plants, which can easily form a film containing oil on the surface of a plant, which has excellent spreadability, and can form a film with good protection performance for plants; A method for producing a composition and a method for coating plants can be provided.

FIG. 1 is a cross-sectional view showing an example of the composition for covering plants of the present invention. 1 is a process diagram showing an example of the method for covering plants of the present invention.

In this specification, the lower and upper limits described in stages for preferred numerical ranges (for example, ranges of content, etc.) can be independently combined. For example, from the description "preferably 10 to 90, more preferably 30 to 60", the "preferable lower limit (10)" and "more preferable upper limit (60)" are combined to become "10 to 60". You can also do that.
In this specification, cellulose nanofibers may be abbreviated as CNF.

[Composition for plant coating]
The composition for coating plants according to an embodiment of the present invention is a composition for coating plants that is supplied to the surface of a plant to coat the surface of the plant, and comprises a substance-containing capsule (X) and an aqueous medium (B). The substance-containing capsule (X) includes an outer shell containing CNF (A) and an oil (C) contained in a space surrounded by the outer shell. Note that in this specification, CNF (A), aqueous medium (B), and oil (C) may be collectively referred to as components (A) to (C).

FIG. 1 is a cross-sectional view showing an example of a composition for covering plants. The plant coating composition 10 shown in FIG. 1 contains a substance-encapsulating capsule (X) and an aqueous medium (B). The substance-containing capsule (X) is composed of an outer shell 2 containing CNF (A).
In the plant coating composition according to the embodiment of the present invention, at least a portion of the oil (C) is encapsulated in the outer shell containing CNF (A).
Here, "a state in which oil (C) is encapsulated in an outer shell containing CNF (A)" means that the outer shell containing CNF (A) forms a hollow particle, and the hollow part of the hollow particle It means a state in which oil (C) is incorporated into. At this time, the oil (C) is separated from the outside of the hollow particles by the outer shell that constitutes the hollow particles. The CNF (A) encapsulating the oil (C) is called a substance-containing capsule (X).

In the plant coating composition of one aspect of the present invention, the substance-containing capsule (X) encapsulates the oil (C), and the CNF (A) constituting the outer shell of the substance-containing capsule (X) is It may be in a state in which oil (C) is adsorbed. In this specification, "the outer shell composed of CNF (A) adsorbs oil (C)" means that oil (C) exists within the network structure of the outer shell composed of CNF (A). It means that.

The CNF (A) contained in the outer shell of the substance-containing capsule (X) has a finer structure than general cellulose fibrils such as pulp, so it has a larger surface area per unit mass, resulting in As a result, the amount of oil (C) attracted to the surface of CNF (A) also increases.
Furthermore, CNF(A) has a plurality of fibers intertwined with each other to form an outer shell. C) It is easy to maintain the adsorbed state.
Therefore, during and for a while after the formation of the substance-containing capsule (X), unless a certain pressure is intentionally applied, the oil (C) will not be incorporated into the substance-containing capsule (i.e., the mesh structure of the outer shell The state in which oil (C) exists in the inner space and the space inside the outer shell is maintained, making it difficult for oil (C) to be released to the outside. Furthermore, the presence of the substance-containing capsule (X) suppresses the oil component (C) from settling into the plant coating composition, thereby maintaining good storage stability of the plant coating composition.

Note that in the plant coating composition of one embodiment of the present invention, an oil component (C) that is not incorporated into the substance-containing capsule (X) may be present.
Further, the substance-containing capsule (X) may contain an aqueous medium (B) together with the oil (C).
Furthermore, the substance-containing capsule (X) may also contain gas such as air. During the stirring process during the formation of the substance-containing capsule (X), gas such as air is mixed into the composition for covering plants. It is also possible that gas is taken in.

By the way, since CNF (A) forms hydrogen bonds with the aqueous medium (B), it has a property of having high affinity with the aqueous medium (B).
Therefore, the outer shell containing CNF (A) of the substance-containing capsule (X) may be in a state in which the aqueous medium (B) is adsorbed. In other words, the substance-containing capsule (X) is in a state in which the oil (C) is encapsulated or in addition, the oil (C) is adsorbed to the outer shell, and the aqueous medium (B) is retained in the outer shell. You can.

In the composition for coating plants of the present invention, the larger the amount of oil (C) incorporated into the substance-containing capsule (X), the more the oil (C) is composed of the substance-containing capsule (X) and is separated from the substance-containing capsule (X). The amount of liquid flowing into the tank will be less.
In addition, the aqueous medium contains substance-containing capsules (X) that have an outer shell containing CNF (A), and CNF (A) that does not form a substance-containing capsule (X) and is dispersed in the aqueous medium. It is thought that the more interactions with water molecules, the smaller the amount of liquid composed of the aqueous medium (B) that exists separately from the CNF (A) because the aqueous medium is retained. Therefore, the solid content in the plant coating composition is preferably as high as possible.
The solid content in the plant coating composition of one aspect of the present invention is preferably 80 to 100% by mass, more preferably 90 to 100% by mass, based on the total amount (100% by mass) of the plant coating composition. It is preferably 95 to 100% by weight, even more preferably 98 to 100% by weight.

As used herein, the "solid content" in the plant coating composition refers to the percentage of solids remaining on the Tetron mesh (#200 mesh) after the plant coating composition is applied onto the Tetron mesh (#200 mesh) and left to stand. Specifically, it refers to the value measured by the method described in Examples.
In addition, the solid content remaining on the Tetron mesh mentioned above includes not only CNF (A) but also oil (C) taken into the substance-containing capsule (X) and the outer shell of the substance-containing capsule (X). The mass also includes the retained aqueous medium (B) and the mass of the aqueous medium (B) retained in the CNF (A) that does not participate in the formation of the outer shell of the substance-containing capsule (X).

In one aspect of the present invention, the average particle diameter of the substance-containing capsules (X) contained in the plant-coating composition is preferably from the viewpoint of suppressing aggregation of the substance-containing capsules (X) in the plant-coating composition. is 1 μm or more, more preferably 5 μm or more, even more preferably 7 μm or more, even more preferably 10 μm or more, particularly preferably 15 μm or more, and from the viewpoint of more uniformly covering the surface of the plant, preferably 60 μm or less, It is more preferably 50 μm or less, still more preferably 40 μm or less, even more preferably 35 μm or less, particularly preferably 30 μm or less.
If the average particle diameter of the substance-containing capsules (X) is 1 μm or more, the substance-containing capsules (X) will be less likely to aggregate with each other in the composition for covering plants, and will be easier to uniformly supply to plants.
Furthermore, when the average particle diameter of the substance-containing capsules (X) is 60 μm or less, the substance-containing capsules (X) are densely supplied to the plant surface, making it easier to coat the plant surface more uniformly.

The standard deviation with respect to the average particle diameter of the substance-containing capsule (X) contained in the plant coating composition of the present invention is preferably 25 μm or less, more preferably 20 μm or less, even more preferably 15 μm or less, and usually 1 μm or more. It is.
If the standard deviation of the average particle diameter of the substance-containing capsules (X) is 25 μm or less, the difference in the amount of organic solvent taken in each substance-containing capsule (X) will not be too large, and it will be uniformly supplied to plants. It becomes easier.

The presence of CNF(A) imparts appropriate thixotropy to the plant coating composition having the above-mentioned structure. For this reason, the composition for covering plants has spreadability, making it easier to adhere to the surface of plants.
In addition, after the plant coating composition is applied to the plant surface, the substance-containing capsule is cleaved, and the oil and CNF are spread over the plant surface in a film form. Effects such as protection of plants from natural heat, maintenance of moisture retention and freshness by suppressing evaporation of water from plants, and prevention of frost damage due to heat insulation effects can be obtained. In addition, CNF can also contribute to the prevention of insect damage by covering the plant surface in a film form.
Furthermore, since the film formed by CNF(A) is considered to be porous, it is less likely to inhibit plant respiration, less likely to hinder the growth of plants before harvesting, and less likely to hinder the growth of plants after harvest. Easy to keep fresh.
Furthermore, since CNF (A) itself is a safe substance for the human body, and safe aqueous medium (B) and oil (C) can also be selected, it is easy to make the entire plant coating composition safe. Therefore, it can also be sprayed on plants at the pre-harvest stage of growth.
Furthermore, since CNF(A) is an amphiphilic material having a hydrophilic group and a hydrophobic site, it plays a role as a surfactant. Therefore, ease of wetting and spreading is ensured, and spreadability can be imparted to the composition for covering plants.

In this specification, the average particle diameter of the substance-containing capsule (X) and the standard deviation with respect to the average particle diameter are determined by measuring the target plant coating composition at a magnification of 500 to 1,000 times using a digital microscope. It can be calculated from the image obtained when observed.
In other words, the average value of the particle diameters (outer diameter of the outer shell constituting the substance-containing capsule (X)) of 36 arbitrarily selected particles among the particles shown in the image is the above-mentioned "average particle diameter". It can be done. Furthermore, the "standard deviation with respect to the average particle diameter" can also be calculated from the particle diameter values of each of the 36 particles. The above standard deviation is the standard deviation of the population, and in the above calculation, the standard deviation is calculated for all 36 particle size values.

The viscosity of the plant coating composition of one embodiment of the present invention at 23° C. and 50 rpm is preferably 500 mPa·s or more, from the viewpoint of achieving good storage stability and suppressing sedimentation when stored in a container. More preferably 1,000 mPa・s or more, still more preferably 1,200 mPa・s or more, and from the viewpoint of improving ease of stirring and removal from the container, preferably 20,000 mPa・s or less, more It is preferably 15,000 mPa·s or less, more preferably 12,000 mPa·s or less.

Furthermore, the TI value (viscosity at a rotation speed of 5 rpm/viscosity at a rotation speed of 50 rpm) at 23° C. of the plant coating composition of one embodiment of the present invention indicates that the composition has good storage stability, and sedimentation occurs when stored in a container. From the viewpoint of suppressing It is 20 or less, more preferably 15 or less, even more preferably 10 or less, even more preferably 8 or less.
Moreover, in this specification, the viscosity of the composition for covering plants means a value measured using a B-type viscometer in accordance with JIS Z 8803:2011.

The pH of the plant coating composition of one embodiment of the present invention is preferably 4 or more, more preferably 5 or more, from the viewpoint that the particles formed are stable and the dispersed state is easily maintained in the plant coating composition. , more preferably 6 or more, preferably 10 or less, more preferably 9 or less, still more preferably 8 or less.
In addition, in this specification, the pH of the composition for covering plants means a value measured based on the method described in Examples in an environment of 23° C. and 50% relative humidity.

The plant coating composition of one embodiment of the present invention may contain components other than CNF (A), aqueous medium (B), and oil (C).
However, in the plant coating composition of one aspect of the present invention, the total content of CNF (A), aqueous medium (B), and oil (C) is the total amount (100% by mass) of the plant coating composition. On the other hand, it is preferably 60 to 100% by weight, more preferably 65 to 100% by weight, even more preferably 70 to 100% by weight, even more preferably 80 to 100% by weight.

The concentration of the active ingredient in the plant coating composition according to one aspect of the present invention is preferably 0%, based on the total amount (100% by mass) of the plant coating composition, from the viewpoint of making it easier to exhibit the effects of the present invention. .5% by mass or more, more preferably 0.7% by mass or more, even more preferably 1.0% by mass or more, even more preferably 1.5% by mass or more, and also facilitates coating by coating or spraying. From this point of view, the content is preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 30% by mass or less, even more preferably 20% by mass or less.
In addition, in this specification, "active ingredient" means the component contained in the composition for covering plants, excluding the aqueous medium (B), and specifically, CNF (A), oil component, etc. (C), polysaccharides other than CNF (A), and various additives. That is, it differs from the above-mentioned "solid content percentage" in that it does not include the mass of the aqueous medium (B) incorporated into the CNF (A).

The substance-containing capsule (X), which has an outer shell containing CNF (A) and incorporates oil (C), is based on the shape (diameter, fiber length, aspect ratio) of the CNF (A) to be blended, and the components (A) to The blending amount of each of (C), the blending ratio of CNF (A) and oil component (C), the blending ratio of aqueous medium (B) and oil component (C), the type of oil component (C), etc. are adjusted as appropriate. By adjusting it, it can be made easier to form.
Next, details of each component constituting the composition for covering plants will be explained.

<Cellulose nanofiber (A)>
Raw materials for CNF (A) used in one embodiment of the present invention include, for example, kraft pulp or sulfite pulp derived from wood; powdered cellulose obtained by pulverizing kraft pulp or sulfite pulp with a high-pressure homogenizer or mill; Microcrystalline cellulose powder purified by chemical treatment such as hydrolysis; Bast fiber pulp such as mulberry, gampi, and mitsumata; Cellulose-based raw materials derived from plants such as cotton pulp, kenaf, hemp, rice, bakasu, and bamboo; etc. Examples include raw materials.

Note that if a large amount of lignin remains in these raw materials, there is a risk of inhibiting the oxidation reaction of the raw materials, so it is preferable to use cellulose-based raw materials from which lignin has been removed from these raw materials.
In addition, it is also possible to use the above-mentioned cellulose-based raw material that has been pulverized using a dispersion device such as a high-speed rotation type, colloid mill type, high pressure type, roll mill type, or ultrasonic type, or a wet type high pressure or ultra-high pressure homogenizer.

Moreover, these cellulose-based raw materials may be chemically and/or physically modified to have enhanced functionality. Here, chemical modification includes addition of a functional group by acetylation, carboxylation, carboxysodiumization, esterification, cyanoethylation, acetalization, etherification, arylation, alkylation, acryloylation, isocyanation, etc. Another example is to compose or coat an inorganic substance such as a silicate or titanate by a chemical reaction or a sol-gel method.
In addition, physical modification of metals and ceramic raw materials includes physical vapor deposition methods (PVD methods) such as vacuum evaporation, ion plating, and sputtering, chemical vapor deposition methods (CVD methods), and plating methods such as electroless plating and electrolytic plating. For example, the surface may be coated with
It should be noted that these modification treatments may be performed at the time of fibrillation of the cellulosic raw material or before or after fibrillation.

The above-mentioned cellulose-based raw material can be made into CNF by defibrating it into nanofibers.
As a specific method, after preparing a dispersion in which a cellulose-based raw material is dispersed in a dispersion medium such as water, a dispersion containing CNF can be obtained by applying shear force to the cellulose-based raw material. .
The method of applying shear force to cellulose raw materials is to add the cellulose raw materials to a dispersion medium such as water, and then use a high-speed rotation type, colloid mill type, high pressure type, roll mill type, ultrasonic type, etc. Preferably.
At this time, the pressure applied to the dispersion is preferably 50 MPa or more, more preferably 100 MPa or more, and still more preferably 140 MPa or more.
From the viewpoint of applying a strong shearing force to the cellulosic raw material under such high pressure, it is preferable to apply the shearing force using a high-pressure device, and it is preferable to use a wet-type high-pressure or ultra-high-pressure homogenizer.

The average diameter (thickness) of the CNFs (A) used in one embodiment of the present invention is such that it is easy to form substance-containing capsules (X) with small variations in shape and size, and the formed substance-containing capsules From the viewpoint of improving the film strength of (X), the thickness is preferably 1.0 nm or more, more preferably 1.5 nm or more, even more preferably 2.0 nm or more, even more preferably 2.5 nm or more, and Preferably it is 1,000 nm or less, more preferably 500 nm or less, even more preferably 200 nm or less, even more preferably 100 nm or less.

The average fiber length of CNF (A) used in one embodiment of the present invention is determined from the viewpoint of facilitating the formation of substance-containing capsules (X) and improving the membrane strength of the formed substance-containing capsules (X). , preferably 0.01 μm or more, more preferably 0.1 μm or more, even more preferably 0.2 μm or more, even more preferably 0.3 μm or more, and preferably 10 μm or less, more preferably 7.0 μm or less, More preferably, it is 5.0 μm or less, even more preferably 2.5 μm or less.

The average aspect ratio of CNF (A) used in one embodiment of the present invention is as follows, from the viewpoint of facilitating the formation of substance-containing capsules (X) and improving the film strength of the formed substance-containing capsules (X). Preferably 5 or more, more preferably 10 or more, still more preferably 15 or more, and preferably 10,000 or less, more preferably 5,000 or less, still more preferably 3,000 or less, More preferably it is 1,000 or less, particularly preferably 500 or less.

Note that the "aspect ratio" is the ratio of the length to the thickness of the target CNF [length/thickness], and the "length" of the CNF is the ratio between the two most distant points of the CNF. refers to distance.
In addition, if a part of the target CNF is in contact with other CNFs and it is difficult to determine the "length", measure the length of only the part of the target CNF where the thickness can be measured. , the aspect ratio of the portion may be within the above range.

In the plant coating composition of one aspect of the present invention, the amount of CNF(A) to be blended is based on the amount of substance-containing capsules with small variations in shape and size based on the total amount (100% by mass) of the plant coating composition. From the viewpoint of facilitating the formation of (X) and improving the membrane strength of the formed substance-containing capsule (X), preferably 0.7% by mass or more, more preferably 0.8% by mass or more, even more preferably The content is 1.0% by mass or more, more preferably 1.2% by mass or more, and from the viewpoint of appropriately adjusting the viscosity of the plant coating composition so as to facilitate the formation of substance-containing capsules (X). , preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 7% by mass or less, even more preferably 5% by mass or less, particularly preferably 3% by mass or less.

<Aqueous medium (B)>
In the composition for coating plants according to one aspect of the present invention, most of the aqueous medium (B) is adsorbed on the outer shell of the substance-containing capsule (X), or is absorbed on the outside of the substance-containing capsule (X). exists in
However, a part of the aqueous medium (B) may be encapsulated together with the oil (C) inside the substance-containing capsule (X).
Examples of the aqueous medium include water, methanol, ethanol, 1-propanol, 2-propanol, diethylene glycol, glycerin, pyrrolidone-based solvents, and mixtures of two or more of these. In particular, water is preferred since the substance-containing capsule (X) has good dispersibility.

In the plant coating composition of one embodiment of the present invention, from the viewpoint of preparing a plant coating composition having an appropriate viscosity and facilitating the formation of substance-containing capsules (X) with small variations in shape and size, The amount of the aqueous medium (B) is preferably 15% by mass or more, more preferably 30% by mass or more, even more preferably 50% by mass or more, based on the total amount (100% by mass) of the plant coating composition. It is even more preferably 60% by mass or more, and preferably 99% by mass or less, more preferably 98.7% by mass or less, even more preferably 98.5% by mass or less.

In the plant coating composition of one embodiment of the present invention, a plant coating composition having an appropriate viscosity is prepared, substance-containing capsules (X ), the blending ratio of the aqueous medium (B) to 100 parts by mass of CNF (A) is preferably 500 parts by mass or more, more preferably 1,000 parts by mass or more, still more preferably 2 parts by mass. ,000 parts by mass or more, even more preferably 3,000 parts by mass or more, and preferably 20,000 parts by mass or less, more preferably 15,000 parts by mass or less, even more preferably 10,000 parts by mass or less. be.

Note that the plant coating composition of one embodiment of the present invention is formed by blending an oil component (C) into an aqueous dispersion containing CNF (A) and an aqueous medium (B).
After preparing the aqueous dispersion in advance, by blending the oil (C), the CNF (A) can easily take in the oil (C), thereby creating substance-containing capsules (X) with small variations in shape and size. more likely to form.
The aqueous dispersion is preferably prepared by blending each component so that the blending ratio of CNF (A) and aqueous medium (B) falls within the above range.
Further, the aqueous dispersion may contain components other than the components (A) to (C) together with the CNF (A) and the aqueous medium (B).

<Oil content (C)>
The oil component (C) used in one aspect of the present invention preferably contains at least one component selected from the group consisting of hydrocarbon oil components, natural animal and vegetable oils, and semi-synthetic oils and fats.
Hydrocarbon oil components include liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, vaseline, n-paraffin, isoparaffin, isododecane, isohexadecane, polyisobutylene, hydrogenated polyisobutylene, polybutene, ozokerite, ceresin, and microcrystalline wax. , paraffin wax, polyethylene wax, polyethylene/polypropylene wax, squalane, squalene, pristane, polyisoprene, wax, and the like.
Natural animal and vegetable oils and semi-synthetic oils and fats include avocado oil, linseed oil, almond oil, prickly pear oil, eno oil, olive oil, cacao butter, kapok wax, kaya oil, carnauba wax, cod liver oil, candelilla wax, beef tallow, beef leg tallow, Beef bone fat, hydrogenated beef tallow, kyonin oil, spermaceti wax, hydrogenated oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, sugar cane wax, sasanquat oil, safflower oil, shea butter, sinensis oil, cinnamon oil, jojoba wax , olive squalane, shellac resin, turtle oil, soybean oil, tea seed oil, camellia oil, evening primrose oil, corn oil, lard, rapeseed oil, Japanese tung oil, bran wax, germ oil, horse tallow, persic oil, palm oil, Palm kernel oil, castor oil, hydrogenated castor oil, castor oil fatty acid methyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil, hydrogenated jojoba ester, macadamia nut oil, beeswax, mink oil, cottonseed oil, cotton wax, Japanese oak, Japanese oak kernel. Oil, montan wax, coconut oil, hydrogenated coconut oil, coconut oil fatty acid glyceride, mutton tallow, peanut oil, lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, isopropyl lanolin fatty acid, POE (polyoxyethylene) lanolin Examples include alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, and egg yolk oil.
Shellac resin is a resin component purified by a known solution extraction method such as the soda method using a resinous secreted substance that covers the body of the shellac insect as a raw material.
The main component of the purified resin component is an ester compound of a linear resin acid such as aleuritic acid and a sesquiterpene resin acid such as jararic acid, laxjalaric acid, and derivatives thereof.
Examples of shellac resins that can be used include purified shellac resins, bleached shellac resins, and decolorized shellac resins.

By using an oil component (C) that becomes liquid at a temperature higher than the melting point of the aqueous medium (B) and lower than the boiling point of the aqueous medium (B), the oil component can be (C) is easily dispersed uniformly throughout the composition, and is also easily encapsulated in the substance-containing capsule (X). Therefore, the oil component (C) is preferably selected in consideration of the melting point and boiling point of the aqueous medium (B) used. In other words, the aqueous medium (B) should be such that the temperature at which the oil (C) becomes liquid is higher than the melting point of the aqueous medium (B), taking into account the temperature characteristics of the oil (C) used. It is preferable to choose a temperature between below the boiling point.

The oil component (C) may also be one obtained by dissolving an oil component that is solid at room temperature into an oil component that is liquid at room temperature, as described later. Further, the oil component (C) may be composed entirely of the various oil components mentioned above, or may be one obtained by dissolving these oil components in an organic solvent. In the latter case, for example, at least one component selected from the group consisting of the above-mentioned hydrocarbon oil components, natural animal and vegetable oils, and semi-synthetic oils and fats is dissolved in an organic solvent that can dissolve the component. It can be used as (C).
In this specification, when an oil component is dissolved in an organic solvent, the entire solution is referred to as an oil component (C).

The content ratio of oil (C) and aqueous medium (B) is preferably 1:0.1 to 1:1,000, more preferably 1:1 to 1,000 in terms of mass ratio. The ratio is 1:500, more preferably 1:2.5 to 1:100, particularly preferably 1:4 to 1:50. In other words, the mass ratio (B)/(C) is preferably 0.1 or more, more preferably 1 or more, even more preferably 2.5 or more, particularly preferably 4 or more, and also preferably It is 1,000 or less, more preferably 500 or less, even more preferably 100 or less, particularly preferably 50 or less. (C): When (B) or (B)/(C) is within the above range, the water content is relatively low, so it dries easily, and when it dries, CNF and oil tend to spread into a film.

The content of oil (C) based on the total mass of the composition for covering plants is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 1.0% by mass or more, and , preferably 80% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less. When the content of oil (C) is within the above range, the covered area and amount of coverage of plants will increase, so effects such as moisturizing and antifouling will be easily exhibited.

<Other components other than components (A) to (C)>
The composition for covering plants according to one aspect of the present invention may contain components other than components (A) to (C) to the extent that the effects of the present invention are not impaired.
Such other components are appropriately selected depending on the use of the plant coating composition, and include, for example, colorants, antioxidants, pH adjusters, sweeteners, fragrances, preservatives, and ultraviolet absorbers. , polymerization inhibitors, antibacterial agents, insecticides, antifoaming agents, foaming agents, flocculants, thickeners, plasticizers, modifiers, flame retardants, flame retardants, and the like.

The composition for covering plants according to one embodiment of the present invention may contain a surfactant.
However, when plant coating compositions containing surfactants are used for human contact applications, the surfactants also act as penetrants and irritating irritants, especially for users with sensitive skin. Furthermore, there is a concern that a composition for covering plants containing a surfactant may affect the stability of the physical properties of the composition for covering plants.
Therefore, in the plant coating composition of one aspect of the present invention, the content of the surfactant is preferably as small as possible.
From the above viewpoint, in the plant coating composition of one embodiment of the present invention, the content of the surfactant is preferably less than 10 parts by mass, more preferably 1 part by mass, based on 100 parts by mass of the total amount of CNF(A). parts by weight, more preferably less than 0.1 parts by weight, even more preferably less than 0.01 parts by weight, particularly preferably less than 0.001 parts by weight, and most preferably 0 parts by weight.

In addition, in the plant coating composition of one aspect of the present invention, polysaccharides other than CNF (A) may be contained, but they can improve the thermal stability of the substance-containing capsules (X) and improve the thermal stability of the substance-containing capsules. From the viewpoint of facilitating the formation of (X), the content of the polysaccharide is preferably as low as possible.
From the above viewpoint, in the plant coating composition of one aspect of the present invention, the content of polysaccharides other than CNF(A) is preferably less than 10 parts by mass, based on 100 parts by mass of the total amount of CNF(A). More preferably it is less than 1 part by weight, still more preferably less than 0.1 part by weight, even more preferably less than 0.01 part by weight, and particularly preferably 0 part by weight.

[Method for producing plant coating composition]
Although there are no particular limitations on the method for producing the composition for covering plants, a method comprising the following steps (1) and (2) is preferred.
- Step (1): A step of preparing an aqueous dispersion containing CNF (A) and an aqueous medium (B).
- Step (2): A step of adding oil (C) to the aqueous dispersion obtained in step (1).
The details of components (A) to (C) used in steps (1) and (2) are as described above.

<Step (1)>
Step (1) is a step of preparing an aqueous dispersion containing CNF (A) and an aqueous medium (B).
In this step, if a commercially available aqueous dispersion is used, this step may be omitted, or CNF (A) or an aqueous medium (B) may be added to the commercially available aqueous dispersion to adjust the desired blending amount. It may also be prepared into an aqueous dispersion.

In addition, when blending other components other than components (A) to (C), they may be blended during the preparation of the aqueous dispersion in step (1), or may be blended after step (2). Good too.

The pH of the aqueous dispersion obtained in step (1) is determined from the viewpoint of suppressing aggregation of CNF (A) in the aqueous dispersion and reducing variations in shape and size of the substance-containing capsules (X) formed. , preferably 4 or more, more preferably 5 or more, even more preferably 6 or more, and preferably 10 or less, more preferably 9 or less, still more preferably 8 or less.

<Step (2)>
Step (2) is a step of adding oil (C) to the aqueous dispersion obtained in step (1).
In this step, it is preferable to add the oil (C) while stirring the aqueous dispersion using a stirring device equipped with a stirring blade such as a homodisper, mixer, or paddle blade.

The stirring speed (rotation speed) when stirring the aqueous dispersion is preferably 500 rpm from the viewpoint of suppressing agglomeration of CNF (A) and reducing variations in shape and size of the substance-containing capsules (X) formed. Above, more preferably 1,000 rpm or more, still more preferably 1,500 rpm or more, even more preferably 2,000 rpm or more, and preferably 5,000 rpm or less, more preferably 4,500 rpm or less, more preferably 4 ,000 rpm or less, more preferably 3,500 rpm or less, even more preferably 3,000 rpm or less.

In addition, when the oil component (C) contains a solid oil component that is a solid component at room temperature, this solid oil component is dissolved in an organic material that is liquid at room temperature, and then the organic material in which this solid oil component is dissolved is made into an aqueous dispersion. By adding the mixture to CNF and further stirring, at least a part of the solid oil contained in the oil (C) is incorporated into the space surrounded by the outer shell of the CNF (A) to form substance-containing capsules (X). It is preferable to let
The organic material that is liquid at room temperature is not particularly limited as long as it is liquid at a temperature higher than the melting point of the aqueous medium (B) and lower than the boiling point of the aqueous medium (B) and can dissolve solid oil. Any organic material can be used depending on the type of solid oil. Oil (C) that is liquid at room temperature can also be used as an organic material that is liquid at room temperature. In this case, it becomes easier to increase the amount of oil (C) contained in the substance-containing capsule (X).

The temperature of the aqueous dispersion when stirring the aqueous dispersion is preferably 5° C. from the viewpoint of suppressing agglomeration of CNF (A) and reducing variations in shape and size of the substance-containing capsules (X) formed. As mentioned above, the temperature is more preferably 10°C or higher, still more preferably 15°C or higher, and from the viewpoint of suppressing volatilization of the added oil (C), preferably 95°C or lower, more preferably 70°C or lower, and even more preferably The temperature is 50°C or lower, more preferably 40°C or lower.

As for the method of adding the oil (C), it is preferable to add it in a fixed amount at fixed time intervals, from the viewpoint of making it easier to uniform the particle size of the substance-containing capsule (X).
Specifically, the amount of oil (C) added every 10 seconds to 100 parts by mass of the total amount of the aqueous dispersion is preferably 0.1 part by mass or more, more preferably 1 part by mass or more, and still more preferably 3 parts by mass. The amount is at least 5 parts by mass, even more preferably at least 5 parts by mass, and is preferably at most 20 parts by mass, more preferably at most 15 parts by mass, even more preferably at most 10 parts by mass, even more preferably at most 7 parts by mass. .

The stirring time from the start of addition of the oil component (C) is preferably 3 minutes or more, more preferably 5 minutes or more, and even more preferably 10 minutes or more, from the viewpoint of making it easier to uniform the particle size of the substance-containing capsules (X). The time is preferably 180 minutes or less, more preferably 120 minutes or less, even more preferably 60 minutes or less, even more preferably 40 minutes or less, particularly preferably 20 minutes or less. Note that the stirring time refers to the time from the addition of the oil (C) to the end of stirring. In order to sufficiently disperse the oil (C) and promote the formation of capsules, stirring should be continued even after the addition of the required amount of oil (C) is completed until the above-mentioned time period from the start of addition of the oil (C) has elapsed. is desirable.

[Plant covering method]
In the method for coating plants according to one embodiment of the present invention, the plant coating composition is supplied to the surface of the plant by coating or spraying, and the surface of the plant is coated with the plant coating composition. Hereinafter, one embodiment of a method for covering plants will be described with reference to the drawings.
FIG. 2 is an enlarged cross-sectional view of the vicinity of the plant surface, schematically showing a method of covering the plant. As shown in FIG. 2(a), a plant coating composition 10 is applied to the surface of a plant 20.
There is no particular restriction on the plants that are the objects to be covered, and various types of plants can be the objects to be covered. There is no particular restriction on the part of the plant to which the plant coating composition is applied, and it can be applied to various parts such as fruits, leaves, stems, and flowers. It may be edible things such as fruits and vegetables, or it may be ornamental plants.

There is no particular restriction on the method of supplying the plant coating composition 10, and for example, a coating method using a coating device such as a brush or a spray coating method using a sprayer or the like can be used. It can also be applied by hand or by dipping the plants in the plant coating composition 10.
When a plant surface is coated by spraying the plant coating composition, the optimal rheology for spraying can be obtained since the plant coating composition has appropriate thixotropy. Therefore, the plant coating composition is prevented from dripping from the spray nozzle. Furthermore, it is possible to prevent the plant coating composition from falling from the plants after spraying. In addition, oil mist has the problem of ignitability, but in the above plant coating composition, the capsules containing oil are covered with an aqueous medium, so even if the plant coating composition is sprayed, It has low ignitability and allows safe application of plant coating compositions.
Since the substance-containing capsules (X) containing oil (C) in the space surrounded by the outer shell 2 are dispersed in the aqueous medium (B), the substance-containing capsules (X) are uniformly arranged on the surface of the plant 20. Easy to do.
Note that at the time when the plant coating composition 10 is supplied to the plant 20, the substance-containing capsule (X) exists on the surface of the plant 20 together with the aqueous medium (B).

When the aqueous medium (B) evaporates by natural drying or drying in a dryer, as shown in Figure 2(b), substance-containing capsules (X) are released from areas where the aqueous medium (B) is low. is cleaved (the cleavage portion of the outer shell 2 is indicated by the symbol 2a). Then, the oil (C) flows out of the substance-containing capsule (X) from the cleavage portion 2a, and the outer shell 2 collapses.
Finally, as shown in FIG. 2(c), the CNF (A) that made up the outer shell 2 dissolves and spreads in a film to cover the surface of the plant 20, and the oil (C) is released. It spreads further to cover it. The aqueous medium (B) evaporates and almost disappears.
In this way, after the substance-containing capsule (X) contained in the plant coating composition is supplied to the surface of the plant, it releases the oil (C) to the outside with the evaporation of the aqueous medium (B), and forms the substance itself. The plants are covered with CNF (A) and oil (C). Therefore, as described above, effects such as protection of plants from sunlight, dirt, etc., maintenance of moisture retention and freshness of plants, and heat insulation can be obtained. In addition, CNF can also contribute to the prevention of insect damage by covering the plant surface in a film-like manner.
The plant coating composition may be supplied to the plants while the plants are growing or after they are harvested. The membrane formed on the surface of the plant by CNF(A) is considered to be porous and does not easily inhibit the respiration of the plant. Therefore, it is difficult to hinder the growth of plants before harvesting, and it is easier to maintain the freshness of plants after harvesting.

In addition, when manually coating plants with the plant coating composition, by washing the hands before the aqueous medium dries and before the substance-containing capsule (X) ruptures, it is possible to prevent the oil from directly adhering to the hands. Since the coating composition can be removed, stickiness is less likely to occur.

Note that an emulsion is not formed simply by adding CNF (A) to oil (C) and stirring. Therefore, even if such a mixture is used, the oil (C) and CNF (A) cannot be properly sprayed onto the plant surface. Therefore, protection and moisture retention of plants are likely to be insufficient, and the effect of preventing insect damage is also likely to be insufficient.

The present invention will be specifically explained with reference to the following examples, but the present invention is not limited to the following examples. In addition, the physical property values in the following synthesis examples, production examples, and examples are values measured by the following method.

[Average diameter (thickness), average length, and average aspect ratio of CNF]
Using a transmission electron microscope (manufactured by Carl Zeiss, product name "LEO912"), the diameter (thickness) and length of 10 arbitrarily selected CNFs were measured, and the average value of the 10 CNFs was calculated from the target. The "average diameter (thickness)" and "average length" of the CNF. Further, "average length/average diameter (thickness)" was defined as the average aspect ratio.

[Example 1]
In preparing plant coating composition E1, the following commercially available aqueous dispersion (1) containing CNF and commercially available liquid paraffin (1) were used.
-Aqueous dispersion (1): Product name "BiNFi-s AMa10002", manufactured by Sugino Machine Co., Ltd. An aqueous dispersion containing 2% by mass of mechanically processed CNF having an average diameter (thickness) of 76.8 nm, an average length of 1.4 μm, and an average aspect ratio of 18.2. It contained 4,900 parts by mass of water based on 100 parts by mass of CNF, and the pH was 7.0.
- Liquid paraffin (1): Product name "Moresco White P-350", manufactured by MORESCO Co., Ltd.
Pour 5,000 parts by mass of the aqueous dispersion (1) (100 parts by mass of CNF) into a container, use an ultra-high-speed multi-stirring system (manufactured by PRIMIX Co., Ltd., product name "Labolution (registered trademark)", stirring blade: Homo The aqueous dispersion was stirred at a rotation speed of 3,000 rpm using a Disper (manufactured by the same company, blade diameter: 35 mm). After the stirring was started, liquid paraffin (1) was added at a rate of 5 parts by mass every 10 seconds to 100 parts by mass of the total amount of the aqueous dispersion. Add liquid paraffin (1) to 5,000 parts by mass of the above aqueous dispersion (100 parts by mass of CNF) until the amount of liquid paraffin (1) becomes 500 parts by mass (solid content ratio: CNF: liquid paraffin = 1:5). The addition was continued, and stirring was terminated 20 minutes after the start of stirring to prepare a plant coating composition E1 containing a substance-encapsulating capsule (X) having an outer shell containing CNF. Note that all operations were performed at room temperature (23°C).
Table 1 shows the materials and amounts used to prepare plant coating composition E1. In addition, Table 1 also shows the materials and blending amounts of each Example and each Comparative Example described below.

[Example 2]
A plant coating composition E2 was prepared in the same manner as in Example 1, except that the following commercially available CNF-containing aqueous dispersion (2) was used in place of the aqueous dispersion (1).
- Aqueous dispersion (2): An aqueous dispersion adjusted to contain 2% by mass of carboxymethylated CNF (CM-modified CNF) manufactured by Nippon Paper Industries Co., Ltd., product name "CM-modified CNF powder product". Average diameter (thickness) = approximately 50 nm, average length = approximately 2 μm, average aspect ratio = approximately 40, and contains 4,900 parts by mass of water per 100 parts by mass of CNF, and pH = It was 7.

[Example 3]
A plant coating composition E3 was prepared in the same manner as in Example 1, except that the following commercially available CNF-containing aqueous dispersion (3) was used in place of the aqueous dispersion (1).
-Aqueous dispersion (3): Product name "TEMPO oxidized CNF", manufactured by Nippon Paper Industries Co., Ltd. An aqueous dispersion containing 1% by mass of chemically treated CNF having an average diameter (thickness) of 3.8 nm, an average length of 0.7 μm, and an average aspect ratio of 184. It contained 9,900 parts by mass of water based on 100 parts by mass of CNF, and the pH was 7.0.

[Example 4]
The same procedure as in Example 2 was used, except that 100 parts by mass of carnauba wax (product name "Powdered Carnauba Wax", manufactured by Yamakei Sangyo Co., Ltd.) dissolved in 500 parts by mass of liquid paraffin (1) was used as the oil. A plant coating composition E4 was prepared.

[Example 5]
In the same manner as in Example 2, except that 500 parts by mass of carnauba wax (product name "Powdered Carnauba Wax", manufactured by Yamakei Sangyo Co., Ltd.) dissolved in 500 parts by mass of liquid paraffin (1) was used as the oil. A plant coating composition E5 was prepared.

[Comparative example 1]
Comparative composition CE1 was prepared in the same manner as in Example 1 except that liquid paraffin (1) was not blended.

[Comparative example 2]
Comparative composition CE2 was prepared by preparing 4,900 parts by mass of water.

[Comparative example 3]
Comparative composition CE3 was prepared by preparing 500 parts by mass of liquid paraffin (1).

[Comparative example 4]
Comparative composition CE4 was prepared in the same manner as in Example 1, except that the ingredients were mixed by hand using a spoon instead of using a stirring device.

Next, the compositions prepared in each example were evaluated as follows. The evaluation results are shown in Table 2.

[Average particle diameter and standard deviation of substance-containing capsules]
In the image obtained when the composition prepared in each example was observed using a digital microscope at a magnification of 500 to 1,000 times, the particle size of 36 randomly selected particles (substance-containing capsule (X) The outer diameter of the outer shell constituting the capsule was measured, and the average value thereof was taken as the average particle diameter of the capsule diameter. Further, the standard deviation was calculated for all of the above 36 particle size values.

[Viscosity and TI value of plant coating composition]
In accordance with JIS Z 8803:2011, the viscosity of each composition was measured at 23° C. and rotation speeds of 5 rpm and 50 rpm using a B-type viscometer. Further, the ratio of [viscosity at a rotational speed of 5 rpm]/[viscosity at a rotational speed of 50 rpm] was defined as the TI value.

[Measurement of solid content in plant coating composition]
Using a truncated conical cup with an upper base diameter of 7.2 cm, a lower base diameter of 6.8 cm, and a height of 8 cm, a Tetron mesh (#200 mesh) cut into a square of 10 cm on a side was placed on the upper base of the cup. Then, the edge of the cup and the Tetron mesh were fixed with clips to prepare a measurement container.
10 g of the compositions prepared in the Examples and Comparative Examples were spread thinly on the Tetron mesh of this measurement container and allowed to stand for 1 minute. Then, the mass w [g] of the liquid in the composition that had fallen into the measurement container was measured, and the solid content percentage in the composition was calculated from the following formula.
・Solid content rate [mass%] = 100 - (w [g] / 10 [g] x 100)

[pH of plant coating composition]
Two-point calibration of pH 4.01 standard solution and pH 6.86 standard solution using a compact pH meter (manufactured by Horiba Advanced Techno Co., Ltd., product name "LAQUAtwin pH-22B") in an environment of 23°C and 50% relative humidity. After performing this, a sample was dropped to cover the entire flat sensor and measurements were taken.

[Spreadability of composition]
After washing the mandarin oranges by hand with water and drying them, the mandarin oranges were placed on a desk, and two pushes of each composition were sprayed onto the mandarin oranges using a commercially available finger spray container, and visually observed after 10 minutes. Then, the spreadability was evaluated according to the following criteria, and 3 and 2 were considered to be acceptable.
・The appearance has not changed from immediately after spraying, and the composition does not drip on the desk...3
・The composition is slightly dripping compared to immediately after spraying, but it is not dripping on the desk...2
・The composition is dripping down on the desk...1

[Presence or absence of capsules after spraying]
Each composition was sprayed onto the outer surface of the tangerine peel using a commercially available finger spray container, and immediately thereafter, the presence or absence of capsules was confirmed by observing at 500x magnification using a digital microscope.

[Surface gloss]
After hand-washing the mandarin oranges with water and drying them, the mandarin oranges were placed on a desk, and five pushes of each composition were sprayed onto the mandarin oranges using a commercially available finger spray container. Then, visually observe the surface condition of the mandarin oranges immediately after spraying and the state of the surface of mandarin oranges one week later, and compare the two to determine whether or not the freshness is maintained immediately after spraying using the following criteria. I judged it.
・The freshness is maintained almost the same as immediately after spraying...3
・Compared to immediately after spraying, the freshness is slightly lower, but it is at a level that is not a problem...2
・There is no freshness or the surface is dry and the level is such that it cannot be shipped as a product...1

From Tables 1 and 2, it can be seen that the plant coating compositions of Examples 1 to 5 all contain capsules containing oil in the outer shell containing CNF, and have excellent spreading properties. I understand. Furthermore, when the plant coating compositions of Examples 1 to 5 are sprayed on plants, the capsules disappear and the oil contained in the capsules spreads over the surface of the plants, thereby successfully protecting the surface of the plants. I understand.
On the other hand, it can be seen that the compositions of Comparative Examples 1 to 4 do not have capsules containing oil and cannot protect the surface of plants for a long period of time when sprayed on plants. It can also be seen that the compositions of Comparative Examples 2 to 4 have poor spreadability.

2 Outer shell 2a Cleavage part 10 Plant coating composition 20 Plant

Claims (14)

A plant coating composition that is supplied to the surface of a plant and coats the surface of the plant,
comprising a substance-containing capsule (X) and an aqueous medium (B),
A composition for covering plants, wherein the substance-containing capsule (X) includes an outer shell containing cellulose nanofibers (A) and an oil (C) encapsulated in a space surrounded by the outer shell. The composition for covering plants according to claim 1, wherein the oil component (C) contains at least one component selected from the group consisting of hydrocarbon oil components, natural animal and vegetable oils, and semi-synthetic oils and fats. The composition for covering plants according to claim 1 or 2, wherein the viscosity of the composition for covering plants at 23° C. and 50 rpm is 500 to 20,000 mPa·s. The plant according to any one of claims 1 to 3, wherein the TI value (viscosity at a rotation speed of 5 rpm/viscosity at a rotation speed of 50 rpm) at 23° C. of the plant coating composition is 1.2 to 20. Coating composition. The composition for covering plants according to any one of claims 1 to 4, wherein the cellulose nanofibers (A) have an average diameter (thickness) of 1 to 1,000 nm. The composition for covering plants according to any one of claims 1 to 5, wherein the cellulose nanofibers (A) have an average fiber length of 0.01 to 10 μm. The composition for covering plants according to any one of claims 1 to 6, wherein the content of oil (C) is 0.05 to 80% by mass based on the total mass of the composition for covering plants. Any one of claims 1 to 7, wherein the content ratio of the oil (C) and the aqueous medium (B) is (C):(B) = 1:0.1 to 1:1,000 in mass ratio. The composition for covering plants according to item 1. The composition for coating plants according to any one of claims 1 to 8, wherein the substance-containing capsule (X) has an average particle diameter of 1 to 60 μm. The composition for covering plants according to any one of claims 1 to 9, wherein the content of the surfactant is less than 10 parts by mass based on 100 parts by mass of the total amount of cellulose nanofibers (A). A method for producing a plant coating composition according to any one of claims 1 to 10, comprising:
Adding oil (C) to a dispersion in which cellulose nanofibers (A) are dispersed in an aqueous medium (B),
The dispersion to which oil (C) has been added is stirred to form substance-containing capsules (X ) A method for producing a composition for covering plants. The oil (C) contains a solid oil that is solid at room temperature, the solid oil is dissolved in an organic material that is liquid at room temperature, and the organic material in which the solid oil is dissolved is added to the dispersion and stirred, 12. The plant coating composition according to claim 11, wherein at least a part of the solid oil component forms substance-containing capsules (X) that are incorporated into the space surrounded by the outer shell of the cellulose nanofibers (A). Production method. A method for coating plants, comprising supplying the plant coating composition according to any one of claims 1 to 10 to the surface of a plant, and coating the surface of the plant with the plant coating composition. The plant coating according to claim 13, wherein the plant coating composition supplied to the plant surface is dried to form a film of at least one of the cellulose nanofibers (A) and the oil (C) on the plant surface. Method.