JP7534872B2 - Agricultural chemical adhesive composition - Google Patents

Description

The present invention relates to an adhesive composition for pesticides, a pesticide composition, and a method for spraying pesticides.

To prevent or eliminate diseases caused by harmful organisms present on plants, such as plant pathogens and plant pests, producers dilute agricultural and horticultural fungicides, insecticides, and other pesticide preparations with water and spray them on plants. However, when pesticides adhere to the plant surface after spraying, their active ingredients are easily washed away by rainfall or irrigation, and they can also be peeled off or removed by wind, reducing the sustainability of the pest control effect of the pesticide. As a result, agricultural productivity declines and the frequency of pesticide spraying increases, leading to increased labor and production costs. Furthermore, there are issues such as a deterioration in environmental safety due to overspraying of pesticides.

To overcome these problems, adhesives have been developed to fix pesticide ingredients to the plant surface, preventing pesticides from being washed away, peeled off, or dropped off due to rainfall, etc.

For example, Patent Document 1 discloses an agricultural chemical adhesive composition that contains a specific fatty acid triglyceride, a specific fatty acid, a polyoxyalkylene sorbitol fatty acid ester, and water.

Patent Document 2 discloses a spreader composition for agricultural chemicals that contains a polysaccharide, a polyoxyalkylene sorbitan fatty acid ester, and one or more nonionic surfactants selected from polyoxyalkylene alkyl ethers, sorbitan fatty acid esters, and silicone surfactants.

JP 2015-163604 A JP 2012-72116 A

In addition to the ability to fix the pesticide to plants, etc., it is also desirable for the adhesive for pesticides to be stable at low temperatures, and in particular to return to a liquid state when heated to room temperature after freezing (hereinafter referred to as low-temperature reversibility). If the low-temperature reversibility is insufficient, it will be necessary to re-dissolve the pesticide by heating or other means when it is used, which reduces workability.

The present invention provides a binder composition for pesticides that has excellent adhesion and low-temperature recovery properties.

The present invention relates to a binder composition for agricultural chemicals, which contains (A) one or more compounds selected from fatty acids having from 8 to 20 carbon atoms and their salts (hereinafter referred to as component A) and (B) one or more compounds selected from sorbitan fatty acid esters and polyoxyalkylene sorbitan fatty acid esters (hereinafter referred to as component B).

The present invention also relates to an agrochemical composition containing the agrochemical adhesive composition of the present invention and an agrochemical raw material.

The present invention also relates to a method for spraying a pesticide using a pesticide spray solution containing a pesticide raw material, the pesticide binder composition of the present invention, and water.

According to the present invention, there is provided an agrochemical fixing agent composition which is excellent in fixing properties of agrochemicals and in low-temperature recovery properties.
The adhesion of pesticides refers to the property of fixing pesticides such as fungicides, insecticides, and herbicides to objects, and the pesticide adhesive composition of the present invention improves the adhesion of such pesticides. By improving the adhesion of pesticides, the pesticides are prevented from being washed away, peeled off, or dropped off due to rainfall, etc., and the efficacy of the pesticides can be maintained for a long period of time on objects such as plants, and rain resistance can be improved.

The agricultural chemical binder composition of the present invention contains one or more compounds (component A) selected from fatty acids having from 8 to 20 carbon atoms and their salts, and one or more compounds (component B) selected from sorbitan fatty acid esters and polyoxyalkylene sorbitan fatty acid esters.
The pesticide binder composition of the present invention exhibits excellent pesticide fixing properties and also exhibits excellent low-temperature recovery properties during low-temperature storage.
Although the details of the action mechanism of the agricultural chemical binder composition of the present invention are not clear, it is believed to be as follows.
It is presumed that component A can improve the adhesion of the pesticide to the plant surface while improving water resistance and significantly improving adhesion. It is presumed that component B stably emulsifies the pesticide and component A when sprayed in water, significantly improving adhesion and low-temperature recovery.
The pesticide adhesive composition, the pesticide composition, and the method for spraying the pesticide composition of the present invention will be described in detail below.

[Agricultural chemicals adhesive composition]
<Component A>
Component A is one or more compounds selected from fatty acids and salts thereof having 8 to 20 carbon atoms. From the viewpoints of improving adhesion and low-temperature recovery, the number of carbon atoms of the fatty acid of component A is 8 or more, preferably 10 or more, and more preferably 12 or more, and from the same viewpoints, it is 20 or less, preferably 18 or less.

The fatty acid of component A may be either a saturated fatty acid or an unsaturated fatty acid, with unsaturated fatty acids being preferred from the viewpoint of improving low-temperature recovery. The fatty acid of component A may be either a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred from the viewpoint of improving adhesion.

Examples of the salts of the fatty acids of component A include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as magnesium and calcium, ammonium salts, amine salts, and alkanolamine salts.

From the viewpoint of improving adhesion and low-temperature recovery, the melting point of component A is preferably 35°C or lower, more preferably 25°C or lower, even more preferably 20°C or lower, and even more preferably 15°C or lower. Here, the melting point of component A is measured by the method described in JIS K 0064. It is preferable that component A is liquid at 25°C.

Specific examples of the fatty acid of component A include caprylic acid, capric acid, 2-propylheptanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, and arachidic acid. From the viewpoint of improving adhesion and low-temperature recovery, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and linolenic acid are preferred, capric acid, lauric acid, myristic acid, oleic acid, linoleic acid, and linolenic acid are more preferred, capric acid, oleic acid, and linoleic acid are even more preferred, and oleic acid is even more preferred. Component A may contain two or more types.

<Component B>
Component B is one or more compounds selected from sorbitan fatty acid esters (hereinafter, component B _S ) and polyoxyalkylene sorbitan fatty acid esters (hereinafter, component B _T ).

From the viewpoint of improving adhesion and low-temperature recovery, the melting point of component B is preferably 25°C or lower, more preferably 20°C or lower, and even more preferably 15°C or lower. Here, the melting point of component B is measured by the method described in JIS K 0064. If component B does not show a clear melting point by this method, it is preferable that component B is liquid at 25°C.

The ester of component B may be a monoester, a diester, or a triester, with monoesters and triesters being preferred.

The number of carbon atoms of the fatty acid constituting component B is preferably 8 or more, more preferably 12 or more, and preferably 20 or less, more preferably 18 or less, from the viewpoint of improving the adhesion and low-temperature recovery. The fatty acid constituting component B may be either linear or branched, and is preferably linear from the viewpoint of improving the adhesion. In addition, the fatty acid constituting component B is preferably a fatty acid selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, and arachidonic acid, more preferably a fatty acid selected from lauric acid, myristic acid, oleic acid, linoleic acid, and linolenic acid, even more preferably a fatty acid selected from lauric acid, oleic acid, and linoleic acid, and even more preferably a fatty acid selected from lauric acid and oleic acid. Component B may contain two or more kinds.

Of the components B, the polyoxyalkylene sorbitan fatty acid ester (component B _T ) preferably contains a polyoxyethylene group as the polyoxyalkylene group. The average number of moles of the polyoxyalkylene group added is preferably 1 or more, more preferably 6 or more, and preferably 50 or less, more preferably 40 or less, and even more preferably 30 or less. The polyoxyalkylene sorbitan fatty acid ester (component B _T ) may include polyoxyethylene (average number of moles of ethyleneoxy group added: 6 to 30) sorbitan fatty acid (carbon number: 8 to 20) esters, and specific examples thereof include polyoxyethylene sorbitan oleate, polyoxyethylene sorbitan laurate, and polyoxyethylene sorbitan palmitate.

Component B includes esters of fatty acids having 8 to 20 carbon atoms and sorbitan or alkylene oxide adducts of sorbitan.

From the viewpoint of improving the adhesion, component B is preferably a sorbitan fatty acid ester (component B _S ), and more preferably an ester of a fatty acid having from 8 to 20 carbon atoms and sorbitan.

<Composition, optional ingredients, etc.>
The agricultural chemical binder composition of the present invention contains component A in an amount of preferably 20% by mass or more, more preferably 40% by mass or more, and preferably 99% by mass or less, more preferably 95% by mass or less. In the present invention, the amount of component A involved in mass % and mass ratio is calculated based on the acid form of the compound.

The pesticide adhesive composition of the present invention contains component B in an amount of preferably 0.5% by mass or more, more preferably 1% by mass or more, and preferably 40% by mass or less, more preferably 20% by mass or less.

From the viewpoint of improving adhesion, the pesticide adhesive composition of the present invention contains Component B in an amount of preferably 1 part by mass or more, more preferably 2 parts by mass or more, even more preferably 4 parts by mass or more, and preferably 1500 parts by mass or less, more preferably 300 parts by mass or less, even more preferably 75 parts by mass or less, even more preferably 50 parts by mass or less, even more preferably 20 parts by mass or less, per 100 parts by mass of Component A.

The pesticide binder composition of the present invention may contain components other than component A and component B to the extent that the effects of the present invention are not impaired.

From the viewpoint of improving low-temperature recovery, the agricultural chemical binder composition of the present invention may further contain (C) a compound (excluding components A and B) having an SP value of 8 to 20 (hereinafter referred to as component C) as necessary. Examples of component (C) include organic solvents having an SP value of 8 to 20.
From the viewpoint of improving low-temperature recovery, the SP value of component C is 8 or more, preferably 8.5 or more, more preferably 8.7 or more, and is 20 or less, preferably 18 or less, more preferably 17 or less. The SP value is a solubility parameter, and is a value determined by the Hoy method (unit: (cal/cm ³ ) ^1/2 ).

From the viewpoint of improving adhesion and low-temperature recovery, component C is preferably one or more compounds selected from propylene glycol, 1-propanol, ethyl acetate, glycerin, butanol, isobutanol, ethanol, 2-propanol, acetone, and ethyl lactate, and more preferably one or more compounds selected from propylene glycol, 1-propanol, and ethyl acetate. Component C may contain two or more types.

When the pesticide adhesive composition of the present invention contains component C, the composition preferably contains 5% by mass or more, more preferably 10% by mass or more, and preferably 90% by mass or less, more preferably 70% by mass or less of component C.

When the agricultural chemical binder composition of the present invention contains component C, the mass ratio C/(A+B) of the content of component C to the sum of the contents of components A and B is preferably 0.05 or more, more preferably 0.1 or more, and preferably 10 or less, more preferably 2.5 or less.

The agricultural chemical fixing agent composition of the present invention may contain, in addition to components A, B, and C, compounds used as, for example, oils or surfactants.

The pesticide binder composition of the present invention may be composed of component A and component B. The pesticide binder composition of the present invention may be composed of component A, component B, and component C. In either case, a small amount of a component other than these components may be contained. The pesticide binder composition of the present invention may also contain water, but the water content may be, for example, 50% by mass or less, further 20% by mass or less, further 5% by mass or less, and further 1% by mass or less in the composition. The pesticide binder composition of the present invention may have a water content of 0% by mass or more, further 0.001% by mass or more, and further 0.01% by mass or more. The pesticide binder composition of the present invention may have a water content of substantially 0% by mass or further 0% by mass. A water content of substantially 0% by mass means that, for example, a very small amount of water that is inevitably mixed in from the manufacturing raw materials may be contained.

[Pesticide composition]
The pesticide composition of the present invention is a pesticide composition containing the pesticide binder composition of the present invention and an agrochemical raw material. The pesticide composition of the present invention may contain component A, component B, and an agrochemical raw material.
The pesticide composition of the present invention may be a compound comprising the pesticide binder composition of the present invention and an agrochemical raw material. The pesticide composition of the present invention may be a compound comprising component A, component B, and an agrochemical raw material.
Furthermore, the pesticide composition of the present invention may contain Component C. Moreover, the pesticide composition of the present invention may further comprise Component C blended therein.
The pesticide composition of the present invention preferably contains water.
The matters described in the pesticide binder composition of the present invention can also be appropriately applied to the pesticide composition of the present invention. For example, the preferred range of the content ratio of component B to the content of component A in the pesticide composition of the present invention and the mass ratio C/(A+B) are the same as those in the pesticide binder composition of the present invention.

The pesticide raw material used in the pesticide composition of the present invention includes at least one pesticide raw material selected from fungicides, insecticides, miticides, herbicides, and plant growth regulators. Here, the pesticide raw material refers to a compound that is an active ingredient of a pesticide.

Examples of agricultural chemical raw materials used in the agricultural chemical composition of the present invention include, but are not limited to, those described in the 2011 edition of the Agricultural Chemicals Handbook (published by the Japan Plant Protection Association on February 25, 2011). In addition, the agricultural chemicals binder composition of the present invention and agricultural chemical compositions containing the same can be used safely without causing any phytotoxicity to various crops.

Examples of fungicides include those described in paragraph 0043 of WO 2012/029893. Examples of insecticides include those described in paragraphs 0044 to 0045 of WO 2012/029893. Examples of acaricides include those described in paragraph 0046 of WO 2012/029893. Examples of herbicides include those described in paragraph 0047 of WO 2012/029893.

In the pesticide composition of the present invention, the ratio of the pesticide binder composition of the present invention to 100 parts by mass of the pesticide raw material is preferably 1 part by mass or more, more preferably 5 parts by mass or more, even more preferably 10 parts by mass or more, and preferably 5,000 parts by mass or less, more preferably 1,000 parts by mass or less, even more preferably 500 parts by mass or less. Each component is contained or blended so as to obtain this ratio.
In the pesticide composition of the present invention, the ratio of the total of components A and B, or the total of components A, B and C, relative to 100 parts by mass of the pesticide raw material is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, even more preferably 1 part by mass or more, and preferably 1000 parts by mass or less, more preferably 500 parts by mass or less, even more preferably 200 parts by mass or less. Each component is contained or blended so as to obtain this ratio.

[Pesticide spraying method]
The pesticide spraying method of the present invention is a pesticide spraying method using a pesticide spray liquid containing a pesticide technical product, the pesticide binder composition of the present invention, and water (hereinafter, also referred to as the pesticide spray liquid of the present invention). The pesticide spray liquid of the present invention may contain a pesticide technical product, component A, component B, and water.
The matters described with respect to the pesticide adhesive composition and the pesticide composition of the present invention can also be appropriately applied to the pesticide spraying method of the present invention.

In the pesticide spray solution of the present invention, the ratio of the pesticide binder composition of the present invention to 100 parts by mass of the pesticide raw material is preferably 10 parts by mass or more, more preferably 20 parts by mass or more, even more preferably 50 parts by mass or more, and preferably 1,000 parts by mass or less, more preferably 500 parts by mass or less, even more preferably 300 parts by mass or less.
For example, in the present invention, the pesticide adhesive composition of the present invention is mixed and sprayed in an amount of preferably 10 parts by mass or more, more preferably 20 parts by mass or more, even more preferably 50 parts by mass or more, and preferably 1,000 parts by mass or less, more preferably 500 parts by mass or less, even more preferably 300 parts by mass or less, per 100 parts by mass of the pesticide raw material.

From the viewpoint of the adhesion of the pesticide, the pesticide spray solution of the present invention contains component A preferably at 10 ppm or more, more preferably at 30 ppm or more, even more preferably at 50 ppm or more, even more preferably at 100 ppm or more, and preferably at 10,000 ppm or less, more preferably at 5,000 ppm or less, even more preferably at 3,000 ppm or less, and even more preferably at 1,500 ppm or less.

From the viewpoint of the adhesion of the pesticide, the pesticide spray solution of the present invention contains component B preferably at 5 ppm or more, more preferably at 10 ppm or more, even more preferably at 15 ppm or more, even more preferably at 20 ppm or more, and preferably at 5000 ppm or less, more preferably at 1000 ppm or less, even more preferably at 800 ppm or less.

When the pesticide spray solution of the present invention contains component C, from the viewpoint of the adhesion of the pesticide, it contains component C preferably at 10 ppm or more, more preferably at 100 ppm or more, even more preferably at 200 ppm or more, and preferably at 10,000 ppm or less, more preferably at 1,000 ppm or less, even more preferably at 500 ppm or less.

The remainder of the pesticide spray solution of the present invention contains water.

The pesticide spray solution of the present invention may have a pH at 20°C of preferably 3 or more, more preferably 4 or more, and preferably 11 or less, more preferably 10 or less.

In the present invention, from the viewpoint of pesticide performance expression, the pesticide spray liquid of the present invention is sprayed preferably at least 0.5 L, more preferably at least 1 L, even more preferably at least 5 L, and preferably at most 5,000 L, more preferably at most 1,000 L, even more preferably at most 500 L, and even more preferably at most 500 L. Specifically, the pesticide spray liquid of the present invention is sprayed preferably at least 0.5 L and at most 5,000 L, more preferably at least 1 L and at most 1,000 L, and even more preferably at most 5 L and at most 500 L, per 10 a. Note that this 10 a is based, for example, on the area of the place where the pesticide spray liquid of the present invention is sprayed.

<Component A>
A-1: Myristic acid 2% by mass, palmitic acid 5% by mass, stearic acid 2% by mass, _C14 - _C18 unsaturated fatty acid 91% by mass (main component: oleic acid) (manufactured by Kao Corporation, "Lunac OV"), melting point 20°C
A-2: Oleic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), melting point 16°C
A-3: Capric acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), melting point 31°C
A-4: Caprylic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), melting point 17°C

<Component B>
B-1: Sorbitan monolaurate (manufactured by Kao Corporation, "Rheodol SP-L10"), melting point 13°C
B-2: Sorbitan monooleate (manufactured by Kao Corporation, "Rheodol SP-O10V"), melting point -10°C
B-3: Sorbitan trioleate (manufactured by Kao Corporation, "Rheodol SP-O30V"), melting point -23°C
B-4: Polyoxyethylene (20) sorbitan monooleate (manufactured by Kao Corporation, "Rheodol TW-O120V") (the number in parentheses is the average number of moles of ethylene oxide added), melting point -24°C

<Component C>
C-1: Propylene glycol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)
C-2: 1-propanol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)
C-3: Ethyl acetate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)

<Component D (pesticide)>
D-1: 40% tetrachloroisophthalonitrile preparation (manufactured by Sumitomo Chemical Co., Ltd., "Daconil 1000")

[Test 1: Pesticide adhesion test]
Cabbage seedlings at the 10-leaf stage (variety: Hatsuaki, manufactured by Takii Seed Co., Ltd.) were prepared in advance, and healthy, fully expanded leaves with about 5 to 8 leaves were used for the test.

A pesticide spray solution was prepared by mixing components A, B, C, D, and water to the concentrations shown in Table 1 (concentrations calculated as active ingredients). Water was used in the amount remaining in the pesticide spray solution.

Cabbage leaves were cut from the petiole, and 100 μL of the above pesticide spray solution was dropped at any four points on each leaf. The leaves were then stored for one day at a temperature of 25°C and a humidity of 60%, after which the droplets of the pesticide spray solution on the cabbage leaves were allowed to dry naturally.

100 mL of distilled water was added to a 200 mL vial (Maruemu Co., Ltd., media vial), cabbage leaves with dried droplets of pesticide spray solution were placed inside, and the vial was rotated at 100 rpm for 3 hours using a rotary shaker (MIX ROTOR VMR-5R, AS ONE Co., Ltd.), with the aim of simulating the agitation of the water to wash away the pesticide components on the leaves.

After that, the leaves were dried at room temperature, and the parts of the leaves with visibly white remaining pesticide attached were cut off with a cutter (4 pieces), and 5 mL of ethanol (FUJIFILM Wako Pure Chemical Industries, Ltd.) and one piece of the cut leaf were placed in a 15 mL centrifuge tube (AGC Technoglass Co., Ltd.), and the pesticide components were extracted by gently stirring by hand for 30 seconds, and the leaf was immediately removed. Here, leaf pieces of the same size were prepared and extraction operations were performed for three systems: an untreated system in which the leaves were not treated with pesticide (extraction with leaves only), a system in which the leaves were treated with only pesticide and no runoff treatment with water was performed, and a system in which only pesticide or pesticide and fixing agent were treated and runoff treatment with water was performed.

The agrochemical technical substance dissolved in ethanol was quantified using a spectrophotometer (U-2910, Hitachi, Ltd.) based on the absorbance at 325 nm derived from the agrochemical technical substance. The average value of each absorbance was used to calculate the adhesion rate according to the following formula (1). The results are shown in Table 1. In the formula, p, q, and r are the absorbances after the following treatments, respectively.
Adhesion rate (%) = (r-p)/(q-p) x 100 (1)
p: Absorbance of the untreated system (extracted only from leaves) where no pesticide was applied to the leaves q: Absorbance of the system where only the pesticide was applied to the leaves and no runoff treatment was performed with water r: Absorbance of the system where only the pesticide or the pesticide and the fixative were applied and runoff treatment was performed with water

[Test 2] Low temperature recovery test of the binder composition for agricultural chemicals Components A, B and C were mixed in the concentrations shown in Table 2 to prepare a binder composition for agricultural chemicals.
In addition, a pesticide binder composition was prepared by removing the pesticide and water from the pesticide spray solution in Table 1 (the ratios of components A, B, and C correspond to the ppm in Table 1, and the total is 100 mass %).
25 g of the agricultural chemical adhesive composition was placed in a 50 mL glass vial (screw tube No. 7, manufactured by Maruemu Co., Ltd.) and stored at -17°C for 2 days to solidify. It was then stored at 25°C for 1 hour, and the recovery state of the composition was visually observed and the low temperature recovery was evaluated according to the following criteria. The results are shown in Tables 1 and 2.
A: Reverted to a transparent liquid AB: Reverted to a cloudy white liquid B: Remained in a solid state and did not revert

As is clear from the results in Table 1, the agricultural chemical binder compositions of the examples containing components A and B of the present invention had improved adhesion rates.
In addition, as is clear from the results in Table 1, the pesticide adhesive compositions of the examples containing components A and B of the present invention have excellent low-temperature recovery properties, and when component C is further contained, the low-temperature recovery properties become even better.

As is clear from the results in Table 2, the agricultural chemical adhesive compositions of the examples containing the components A and B of the present invention are excellent in low-temperature recovery property.
The pesticide adhesive compositions of Examples 2-1 to 2-8 can be used together with the pesticide technical substance D-1 to prepare the same pesticide spray solution as in Example 1.

Claims (8)

The binder composition for agricultural chemicals contains (A) one or more compounds selected from fatty acids having from 8 to 20 carbon atoms (hereinafter referred to as component A) and (B) one or more compounds selected from sorbitan fatty acid esters and polyoxyalkylene sorbitan fatty acid esters (hereinafter referred to as component B), wherein the binder composition for agricultural chemicals contains 4 to 75 parts by mass of component B relative to 100 parts by mass of component A , and has a binder ratio of 50% or more as calculated by the following formula (1) using the average value of each absorbance quantified at a wavelength derived from an agricultural chemical raw material:
Adhesion rate (%) = (r-p)/(q-p) x 100 (1)
In the formula,
p: Absorbance of untreated system (extracted only from leaves) where no pesticides were applied to the leaves
q: Absorbance of the system in which only the pesticide is applied to the leaves and no runoff treatment is performed with water
r: Absorbance of the system in which the pesticide and the fixative were applied to the leaves and then runoff was carried out by water. The agricultural chemical fixing agent composition according to claim 1, wherein component B is one or more compounds selected from esters of fatty acids having 8 to 20 carbon atoms and sorbitan, and esters of alkylene oxide adducts of fatty acids having 8 to 20 carbon atoms and sorbitan. The pesticide adhesive composition according to claim 1 or 2, containing 4 to 50 parts by mass of component B per 100 parts by mass of component A. The agricultural chemical fixing agent composition according to any one of claims 1 to 3, further comprising (C) a compound (excluding component A and component B) having an SP value of 8 or more and 20 or less. An agricultural chemical composition comprising the agricultural chemical adhesive composition according to any one of claims 1 to 4 and an agricultural chemical raw material. A method for spraying an agricultural chemical using an agricultural chemical spray solution containing an agricultural chemical raw material, an agricultural chemical adhesive composition according to any one of claims 1 to 4, and water. The pesticide spraying method according to claim 6, wherein the pesticide spraying solution contains 10 parts by mass or more and 1,000 parts by mass or less of the pesticide binder composition per 100 parts by mass of the pesticide raw material. The method for spraying a pesticide according to claim 6 or 7, in which 0.5 L to 5,000 L of the pesticide spray solution is sprayed per 10 a.