JP4578943B2 - Agrochemical composition - Google Patents

Description

  The present invention relates to an agrochemical composition.

  Agricultural chemicals such as insecticides, fungicides, herbicides, acaricides, plant growth regulators are used in dosage forms such as emulsions, wettable powders, granules, powders, and flowables. At that time, in order to sufficiently bring out the effect of the raw material of the agricultural chemical, various devices have been made on the physical properties of the preparation. However, it is difficult to further enhance the effect of the agricultural chemical by the device on the preparation.

Conventionally, a surfactant has been used as a spreading agent for agricultural chemicals or a component that enhances the efficacy of agricultural chemicals (Patent Document 1). It is also known to use sorbitan fatty acid esters as pest control agents (Patent Documents 2, 3, and 4).
Japanese Patent Laid-Open No. 8-151302 U.S. Pat. No. 2,374,918 Japanese Patent Publication No.61-23161 Japanese Patent Publication No.62-43968

  Pesticides are expected to have excellent biocidal effects, low toxicity to human livestock, low phytotoxicity, low persistence, excellent handleability, and easy availability . In addition to the single medicinal effect, those having a plurality of medicinal effects may be advantageous.

  The subject of this invention is obtaining the agrochemical composition excellent in safety | security and excellent in the insecticidal effect, the acaricidal effect, or the bactericidal effect. Furthermore, together with these effects, an agrochemical composition with low phytotoxicity is obtained.

  The present invention relates to a polyhydric alcohol fatty acid ester nonionic surfactant (A) [hereinafter referred to as component (A)] and a polyhydric alcohol fatty acid ester alkylene oxide adduct nonionic surfactant [hereinafter referred to as (B1). And a pesticide composition containing one or more (B) [hereinafter referred to as component (B)] selected from resin acid-based nonionic surfactant (hereinafter referred to as component (B2)), and the agrochemical The present invention relates to a method for controlling insects (pests), mites, or fungi using the composition.

  ADVANTAGE OF THE INVENTION According to this invention, the agrochemical composition excellent in safety | security and excellent in the insecticidal effect, the acaricidal effect, or the bactericidal effect is obtained. That is, the present invention provides an insecticidal, acaricidal or bactericidal agricultural chemical composition. Furthermore, according to the present invention, an agrochemical composition having these effects and having low phytotoxicity can be obtained.

<(A) component>
Examples of the polyhydric alcohol fatty acid ester nonionic surfactant include sorbitan fatty acid ester, glycerin fatty acid ester, and sucrose fatty acid ester.

  Of these, sorbitan fatty acid esters are preferred. As the sorbitan fatty acid ester, any of mono-, di- and triesters can be used. However, those having a monoester content of 25 to 70% by weight are desirable. The fatty acid constituting the ester is preferably a fatty acid having 8 to 22 carbon atoms and more preferably 8 to 18 carbon atoms, and specific examples include capric acid, lauric acid, palmitic acid, oleic acid, stearic acid and the like. The component (A) is preferably sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, or sorbitan monooleate.

<(B) component>
Among the components (B), as the (B1) component polyhydric alcohol fatty acid ester alkylene oxide (hereinafter referred to as alkylene oxide AO) adduct-based nonionic surfactant, sorbitan fatty acid ester AO adduct, glycerin fatty acid ester AO adduct, sucrose fatty acid ester AO adduct, etc. are mentioned.

  As the component (B1), a sorbitan fatty acid ester AO adduct is preferable. A sorbitan fatty acid ester AO adduct is produced by a method of adding AO to sorbitan and then esterifying with a fatty acid. Examples of AO to be added include ethylene oxide (hereinafter referred to as EO), propylene oxide (hereinafter referred to as PO), butylene oxide (hereinafter referred to as BO), and EO is particularly preferable. The average added mole number of AO is preferably 2 to 30 moles, more preferably 5 to 25 moles. In the sorbitan fatty acid ester AO adduct, mono, di and triesters can be used as in the case of sorbitan fatty acid ester, but a mixture of these is generally used. However, those having a monoester content of 25 to 70% by weight are desirable. The fatty acid constituting the ester is preferably a fatty acid having 8 to 22 carbon atoms and more preferably 8 to 18 carbon atoms, and specific examples include capric acid, lauric acid, palmitic acid, oleic acid, stearic acid and the like. The component (B1) is preferably polyoxyethylene (EO average addition mole number of 5 to 30) sorbitan monooleate.

  Moreover, as resin acid type nonionic surfactant which is (B2) component among (B) component, a rosin AO adduct is preferable. The rosin AO adduct is obtained by adding 2 to 50, preferably 5 to 40 moles, more preferably 8 to 30 moles of AO containing AO, preferably EO essential, to rosin on average.

  Here, rosin is a resin acid present in the residue obtained by distilling off volatile substances such as essential oils from resin oils obtained mainly from plants of the pine family, and abietic acid and its analogs as main components, Contains pimaric acid and the like. Since rosin is derived from a natural product, there are some variations in constituent components and physical properties, but in the present invention, any rosin that is normally distributed as rosin can be used. Among the rosins, those circulated as tall rosin are particularly preferable.

  In the agricultural chemical composition of the present invention, the weight ratio of the component (A) to the component (B) is preferably (A) / (B) = 1 / 0.01 to 1/5, and further, the stability of the preparation and the viewpoint of the biocidal effect. Therefore, (A) / (B) = 1 / 0.01 to 1/1 is more preferable. Moreover, it is preferable that the agrochemical composition of this invention contains (A) component by 1000-5000 ppm, and also the density | concentration of 1000-2000 ppm. The composition containing the component (A) at this concentration can be used as an agrochemical formulation as it is or after being appropriately diluted so that the concentration of the component (A) is at least 1000 ppm.

  The present inventors have found that when the component (A) and the component (B) are combined, pests, mites or fungi can be effectively controlled. Furthermore, two or more of the three harmful organisms, and even three of them can be effectively controlled simultaneously. Conventionally, it is known that the component (A) and the component (B) of the present invention are blended in an agrochemical composition alone as an agrochemical or as an auxiliary component of an agrochemical base, etc., but these are used in combination. In addition to that, it has not been known that when these are used in combination, an agrochemical composition excellent in insecticidal effect, acaricidal effect or bactericidal effect can be obtained. Of the three medicinal effects, the present invention provides an agrochemical composition that functions not only individually but also in combination of two or more and even three at the same time.

That is, according to the present invention,
(1): Insecticide comprising (A) component and (B) component (2): Acaricide comprising (A) component and (B) component (3): (A) component and (B) component Bactericide (4): Insecticide consisting of (A) component and (B) component, acaricide (5): Insecticide consisting of (A) component and (B) component, fungicide (6): Acaricide and fungicide comprising component (A) and component (B) (7): An insecticide, acaricide and fungicide comprising components (A) and (B) are obtained.

  In the agricultural chemical composition of the present invention, a surfactant other than the component (A) and the component (B) can be used in combination. As such surfactant, (A) component, nonionic surfactant other than component (B), anionic surfactant, cationic surfactant and amphoteric surfactant, or a mixture thereof should be used. Can do. As the surfactant used in combination, an anionic surfactant is preferable.

  Anionic surfactants include sodium mono- and di-alkylnaphthalene sulfonate, sodium alpha-olefin sulfonate, sodium alkane sulfonate, alkyl sulfosuccinate, alkyl sulfate, polyoxyalkylene alkyl ether sulfate, polyoxy Alkylene alkyl aryl ether sulfates, polyoxyalkylene styryl phenyl ether sulfates, mono- and di-alkyl benzene sulfonates, alkyl naphthalene sulfonates, formaldehyde condensates of alkyl naphthalene sulfonates, alkyl diphenyl ether sulfonates, olefinic sulfonic acids Salts, mono and dialkyl phosphates, polyoxyalkylene mono and dialkyl phosphates, polyoxyalkylene mono and diphenyl ethers Phosphates, polyoxyalkylene mono and dialkyl phenyl ether phosphates, polycarboxylates, fatty acid salts, linear and branched alkyl polyoxyalkylene ether acetic acid or salts thereof, alkenyl polyoxyalkylene ether acetic acid or salts thereof, linear And branched alkylamide polyoxyalkylene ether acetic acid or a salt thereof, stearic acid and a salt thereof, oleic acid and a salt thereof, N-methyl fatty acid taurides, a mixture of two or more of these (sodium, potassium, ammonium) And amine salts). As the anionic surfactant, fatty acid salts are preferable, and sodium salts and potassium salts of higher fatty acids such as oleic acid and castor oil fatty acid are particularly preferable.

  Moreover, you may add a chelating agent, a pH adjuster, inorganic salt, a thickener, etc. to the agrochemical composition and its formulation of this invention as needed.

  The formulation type of the agrochemical composition of the present invention may be any of emulsion, solution, wettable powder, flowable formulation and the like, and the formulation type is not limited. Therefore, it may contain other additives according to the formulation type, such as emulsifiers, solvents, dispersants, carriers and the like.

Example 1
<Agricultural chemical composition>
Using the agrochemical composition containing each component at the concentrations shown in Tables 1 and 2 (the balance is water), an acaricidal test, an insecticidal test, and a bactericidal (control value) test were performed by the following methods. The results are shown in Tables 1 and 2.

(1) Tick-killing test Adult spider mites were placed on a green bean leaf disk in 30 cultivars per group, 3 repetitions, and then cultured at 25 ° C for 24 hours. After that, the entire leaf disc is immersed in the pesticide composition for 5 seconds, taken out from the pesticide composition and observed after standing at 25 ° C for 48 hours. I asked for it.

(2) Insecticidal test Adult peach aphid was applied to a green kidney bean leaf disc in 30 animals per group, 3 times, and then cultured at 25 ° C for 24 hours. Thereafter, the entire leaf disc was immersed in the pesticide composition for 5 seconds, taken out from the pesticide composition, and allowed to stand at 25 ° C. for 48 hours and then observed, and the insecticidal rate was determined based on the case of the untreated section.

(3) Sterilization test A spore suspension (10 ⁷ / ml) of cucumber gray mold fungus was sprayed on cucumber seedlings at a rate of 10 ml per pot and allowed to stand at 25 ° C. and 90% relative humidity for 1 day. The agrochemical composition was sprayed at 5 ml per pot. Thereafter, the cells were cultured at 25 ° C. and 85% relative humidity, the number of lesions was counted, and the control value for the untreated area was calculated by the following formula.

  Comparative products 1-7 to 1-9 show the weight ratio of (A) component / other components as (A) / (B) weight ratio for convenience.

Example 2
<Agricultural chemical composition>
Using the agrochemical composition containing each component at the concentration shown in Table 3 (the balance is water), a phytotoxicity test was conducted on soybeans by the following method. The results are shown in Table 3.

<Drug hazard test>
Apply a sufficient amount of the agrochemical composition to five soybean seedlings (main leaf 1-2 leaf stage) with a sprayer. Seven days after the distribution of the agricultural chemical composition, the degree of browning chemical damage was evaluated for each strain according to the following criteria by visual observation, and the average of five strains was obtained.
・ Chemical hazard criteria ×: Withered (over 75% browning)
+++: Browning of 50% or more and less than 75% ++: Browning of 25% or more and less than 50% +: Browning of 5% or more and less than 25% ±: Browning of more than 0% and less than 5%-: Healthy (no phytotoxicity)

Claims (4)

Insecticide, killing consisting of sorbitan fatty acid ester (A) whose fatty acid constituting the ester is a fatty acid having 8 to 22 carbon atoms and polyoxyethylene rosin acid ester (B) having an average added mole number of ethylene oxide of 10 to 30 An agrochemical composition for mite or sterilization, which is used as an agrochemical formulation having a concentration of (A) of 1000 to 5000 ppm. A sorbitan fatty acid ester (A) in which the fatty acid constituting the ester is a fatty acid having 8 to 22 carbon atoms , a polyoxyethylene rosin acid ester (B) having an average added mole number of ethylene oxide of 10 to 30, and an anionic surfactant A pesticidal composition for insecticide, acaricide or sterilization, comprising (C), wherein the pesticidal composition is used as an agrochemical formulation having a concentration of (A) of 1000 to 5000 ppm. The agrochemical composition according to claim 1 or 2, wherein the weight ratio of (A) to (B) is (A) / (B) = 1 / 0.01 to 1/5. A method for controlling insects, ticks or fungi using a pesticidal formulation (A) having a concentration of 1000 to 5000 ppm prepared from the pesticidal composition according to any one of claims 1 to 3 .