JP2821467B2 - Non-phytotoxic oil-release pesticides - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an oleaginous insecticide having no phytotoxicity, and more particularly, to a high-boiling solvent (or a high-boiling solvent) obtained by mixing a particulate carrier insecticide and a fluorine compound. Vegetable oil or mineral oil added to the insecticide granules.

The present invention also relates to the insecticide granules obtained by impregnating a high-boiling solvent (or a high-boiling solvent with vegetable oil or mineral oil added thereto) in which a pesticidal component is mixed in a granular carrier to which a fluorine compound has been added.

When the product of the present invention is sprayed on the water surface of a paddy field, oil components are uniformly released on the water surface and in the water to exert a sustained insecticidal effect, and there is no phytotoxicity to rice.

[Conventional technology and its problems] In recent years, the damage of rice weevil to rice has increased, and it has become a very important insect damage problem for rice cultivation farmers. Rice weevil is a well-known pest newly introduced to Japan from California in the United States, and its distribution has been significantly expanded since its discovery in Aichi Prefecture in 1976, and is now distributed throughout the country.

The pest overwinters as an adult, moves from the overwintering area to a paddy field by walking and walking, swims from the shore to reach the rice body, and starts to eat. After the feeding damage for a certain period, the present pest lays eggs on the rice stem, and the hatched larva passes through the water surface and reaches the root. After that, they spend time in the water until the emergence.

The present inventors, by observing the behavioral ecology of rice water weevil, by observing the insect, formed a uniform, stable and stable phytotoxic film on the diving surface against this pest, and Various investigations were conducted on the most effective control method by contacting the pests. Examples of the prior art include the following inventions.

In the specification of Japanese Patent Publication No. 41-10036, an insecticidal composition is described. The composition contains various higher alcohols and an organic phosphorus-based insecticide component or an organochlorine-based insecticide component. It contains a colloidal substance. However, those listed as specific examples are all powdered using only higher alcohol as a spreading agent, and have sufficient formation of a drug film when sprayed on the water surface. I can't say.

Japanese Patent Publication No. 41-10037 describes a water-developable insecticidal composition. And the composition is a developing agent using an addition conjugate such as higher fatty acid and ethylene oxide,
An organic phosphorus-based or organic chlorine-based insecticidal component is used, which is dropped on the water surface.

The specification of JP-B-44-17400 describes a pesticide applied to the surface of the water. The composition is obtained by mixing a pesticide with a mixture of one or two or more solvents and a spreading agent and dropping the mixture on the water surface.

JP-B-47-34135 describes a pesticidal composition for surface application. The composition is prepared by mixing an insecticide with a water-soluble liquid having a specific gravity of less than 1 and a boiling point of 200 ° C. or less, a thermoplastic synthetic resin or the like, and dropping and injecting the mixture into a paddy field.

The specification of JP-B-56-71001 describes a water surface application agent having good spreadability. The composition is prepared by mixing an organic solvent which is mixed with and immiscible with water, and an insecticide comprising one or more of an organic phosphorus-based pesticide and a carbamate-based pesticide, and dropped on the water surface.

JP-A-62-198602 describes an insecticidal composition of oil-release granules. The composition component is a mixture of an organic phosphorus pesticide such as vegetable oil and mineral oil and an insecticide composed of one or more of carbamate-based pesticides and impregnated with a granular carrier. In some cases, oil droplets containing suspended pesticide components adhered excessively to rice plants and caused chemical damage under certain conditions.

[Problems to be Solved by the Invention] As a result of additional examination based on the above-mentioned known technology, the present inventors have found that in order to form an effective oil film on the water surface, a certain size containing an effective insecticidal component is contained. The particles are sprayed, and at the moment the particles come into contact with water on the surface of the water, a part of the active ingredient is released together with the oil, and after the particles settle to the bottom of the water, they remain continuously at the same time as the particles gradually disintegrate. It is most preferable that the active ingredient is released. In addition, the oil film floating on the water surface is uniformly and stably diffused in order to eliminate the adverse effect on the rice body, and the excess to the rice body is reduced. The finding that it is desirable to eliminate excessive adhesion has been achieved.

This is because when the surface application agent is used, algae are generated in the paddy fields and the entire surface of the water is covered, so if oil is simply dropped, an oil film is formed on the algae. The idea is to focus on the point that the insecticidal effect is reduced because of swimming under the sea. And as a result of further research to develop a harmless oleaginous pesticide that satisfies the above conditions, as a result of adding a water-repellent organic fluorine-based compound to a specific oil mixed with insecticide components, It has been found that impregnation with a specific bulking agent provides desirable results and the present invention has been completed.

As apparent from the above description, an object of the present invention is to provide an oil-release pesticidal agent having a high insecticidal efficiency and having no harm to rice plants as a water application agent. Also,
Another object is to provide a method for killing pests that are active in water, such as rice water weevil, by contact with insecticide components in water.

[Means for Solving the Problems] The present invention has the following configurations.

(1) One or two or more insecticidal components are mixed with a composition obtained by mixing a water-repellent organic fluorine-based compound with a high-boiling solvent, vegetable oil, mineral oil, or a mixture thereof that is insoluble in water, The mixture is impregnated with a carrier made of a granular composition formed by molding a mineral powder or a vegetable powder, or one or two kinds of high-boiling solvents, vegetable oils, mineral oils, or mixtures thereof that are insoluble in water. The above insecticidal components are mixed, and the mixture is mixed with a mineral powder or a plant powder, mixed with an organic fluorine compound having a water-repellent action, and impregnated into a carrier composed of a molded granular composition. Non-phytotoxic oil-release pesticide granules.

(2) vegetable oils are cedar oil, rapeseed oil, corn oil,
One or more oils selected from sesame oil, soybean oil, menzite oil, sunflower oil, castor oil, drill oil, eno oil, linseed oil, or rice bran oil, and the mineral oil is spindle oil, kerosene oil, heavy oil or xylene. Wherein the high boiling point solvent is a solvent selected from dioctyl adipate, diisononyl adipate, diisodecyl adipate, diisooctyl phthalate, methyl naphthalene, and butyl benzylate. An oleaginous insecticide granule having no phytotoxicity according to the above item.

(3) the mineral powder is at least one selected from clay, talc, diatomaceous earth, calcium carbonate or magnesium carbonate, and the vegetable powder is selected from flour, starch, rice bran, bran, coconut, and oil cake The harmless oil-release insecticide granule according to the above item (1), which is one or more kinds of the obtained pesticides.

(4) The non-phytotoxic oil-releasing insecticidal granule according to the above (1), wherein the insecticidal component is at least one selected from pyrethroid A, pyrethroid B, pyrethroid C, reldan or off-nack, and XMC.

 The configuration and effect of the present invention will be described in detail below.

The essential components of the oil-releasing insecticide granules of the present invention are a water-insoluble high-boiling solvent, a vegetable oil or a mineral oil (high-boiling solvents are preferably used in combination with any of mineral oil and plant parts), and water-repellent organic fluorine compounds. , Insecticidal components, and carriers (particulate inorganic and organic compositions).

The water-insoluble high boiling solvent used in the present invention has a specific gravity of 1 or less and a boiling point of 200 ° C. or more, such as octyl adipate, diisononyl adipate, diisodecyl adipate, diisooctyl phthalate, and methyl naphthalene Can be preferably used.

The vegetable oil that can be used in the present invention is not limited, but, for example, cedar oil, rapeseed oil, sesame oil, soybean oil, menzite oil, sunflower oil, castor oil, drill oil, eno oil, flaxseed oil, rice bran oil, and the like are preferably used. it can. Vegetable oil is used in consideration of the microbial decomposition of the oil component after application of the product of the present invention, and also to avoid water pollution on paddy fields and the like and to reduce phytotoxicity to crops.

As the mineral oil used in the present invention, for example, spindle oil, kerosene, heavy oil, xylene and the like can be preferably used. As a preferred embodiment of the present invention, the use of a high-boiling solvent and a mineral oil or a vegetable oil in combination takes into account the dissolution of the insecticidal component and the retention of the insecticide in a solution state after the dissolution. Hold properly.

The organic fluorine-based compound used in the present invention is not particularly limited as long as it has a water-repellent action.For example, perfluoroalkyl acrylate methyl methacrylate copolymer, alkyl methacrylate perfluoroalkyl methacrylate copolymer,
Preferred are fluoroalkylcarboxylic acids and perfluoroalkylcarboxylic acids. Since the product of the present invention incorporates and uses a water-repellent organic fluorine compound, after spraying, the diffusion of the oily substance containing the insecticidal component on the water surface is remarkably good, and there is no partial stagnation. Moreover, the oil containing the dispersed insecticidal component forms a stable thin film on the water surface for a long period of time, and even if the rice body temporarily lays down, the excess of the oily substance with respect to the rice body is obtained. No adhesion.

The insecticidal component used in the present invention is not limited. In addition to the direct insecticidal effect on the target pest, it is required to have low fish toxicity and low toxicity to human harm, and therefore, the organophosphorus insecticide is required. In addition to the components, carbamate insecticides, pyrethroid insecticides, and the like are recommended. The insecticidal component preferably has good solubility in the above-mentioned vegetable oil or mineral oil. Specific examples of such insecticidal components include pyrethroids A (B, C), reldan, XMC, and off-nack.

Use ratio (weight ratio) of the above-mentioned high boiling point solvent, vegetable oil or mineral oil, insecticidal component and water-repellent organic fluorine compound
Is not limited, but in order to effectively impregnate the carrier described below with the insecticide component, 1 part of the
A ratio of 15 parts, a water-repellent organofluorine compound of 0.002 to 1.0 part, preferably 0.02 to 0.5 part is recommended.

The order of mixing these useful components is not limited, and they may be mixed in any order. In addition, the water-repellent organic fluorine-based compound may be added to a carrier composed of the following granular composition (hereinafter, referred to as a small-particle carrier). The oily mixture according to the invention mixed with the insecticidal component is then impregnated and absorbed in the following small-granular carrier.

Mineral powders include, for example, talc, clay, diatomaceous earth, white carbon, silica, fly ash, and the like.Vegetable powders include flour, starch, rice bran, bran, coconut, oil cake, etc. Can be. In addition, as a binder, it is desirable to use a water-soluble paste such as polyvinyl alcohol, gelatin, and carboxymethyl cellulose in order to facilitate disintegration after the small-particle-shaped carrier is put into water. Further, it is desirable to add a small amount of a water-soluble surfactant such as sodium dodecibenzenesulfonate as an auxiliary component (spreading aid).

The usage ratio (weight ratio) of the mineral powder or the vegetable powder, the binder and the surfactant and the mixing method are, for example, 0.01 to 0.10 part of the binder, 0.001 part of the surfactant per 1 part of the powder.
After mixing the three components sequentially or simultaneously, the mixture is molded. When the water-repellent organic fluorine compound is added to the small-particle carrier, the water-repellent organic fluorine compound may be added to a mineral powder or a vegetable powder, or may be added to a binder and a surfactant to be molded.

During the mixing, a small amount of water may be mixed, or the water may be previously mixed with a binder or a surfactant. As the molding method, various known granulation methods, for example, bread granulation and extrusion granulation can be applied. A small particulate carrier is thus obtained.

Next, the above-mentioned pesticidal component-containing oil mixture is impregnated into the above-mentioned small particulate carrier. The impregnation method is not limited. For uniform impregnation, for example, a method in which a predetermined amount of the carrier is kept in a rolling state or a fluid state and the oily mixture is dropped, sprayed, or sprayed can be adopted. However, of course, the former may be absorbed by the latter by immersing the small particulate carrier in the oily mixture. Although conditions such as the impregnation temperature are not limited, for example, the treatment is performed at room temperature to 50 ° C. for 30 minutes to 24 hours for easy treatment.

After completion, if necessary, through-flow drying or the like is performed to remove a part of unnecessary moisture or mineral oil. The oleaginous insecticide granules of the present invention thus obtained are products which have good flowability and do not easily powder or solidify. In addition, the method for producing the product of the present invention is simple and does not require a special heating step, so that there is no fear that the insecticidal component is decomposed.

When the product of the present invention is sprayed on water, a uniform oil film is first formed on the water surface at the moment of contact with water, and then, after the product of the present invention reaches the water surface via the water, the particulate matter gradually disintegrates, and the disintegration occurs. Simultaneously releases the active ingredient. Thus, even when a film of algae and various substances is present on the water surface, it is possible to form independent oil films on the upper surface and the lower surface of the film, respectively, and to exhibit a stable insecticidal effect. Also,
The oil film on the water surface is diffused uniformly and stably, there is no excessive adhesion to rice, and there is no chemical damage to rice.

In addition, the oil-releasing insecticide granules of the present invention can control paddy rice pests other than rice water weevil. For example, as is well known, brown planthoppers are pests that fly from overseas every year. In recent years, susceptibility to insecticides has been reduced, and there has been a demand for a drug that exhibits excellent efficacy. The present inventors have observed the fact that brown planthoppers and other planthoppers and leafhoppers have reached the water surface several times a day, and have confirmed a remarkable effect as a result of applying the oil-release insecticide granules of the present invention. did it.

The present invention will be described below with reference to examples and comparative examples.

Example 1, Comparative Example 1 5.0 parts by weight of cedar oil (hereinafter, parts by weight), 10.0 parts of dioctyl adipate and 5.0 parts of reldan were mixed, and the mixed part was mixed with 2.5 parts of polyvinyl alcohol (hereinafter, referred to as PVA).
Parts, 0.2 parts of sodium dodecylbenzenesulfonate and 0.3 parts of Erasguard 200 (Daiichi Kogyo Seiyaku Co., Ltd. water-repellent organic fluorine compound) mixed with 77.0 parts of clay, and impregnated with the granulated particles at room temperature. Absorbable granules (sample-A) according to the present invention by absorbing the whole amount and having no phytotoxicity
(Comparative Sample-A) was produced in the same manner except that 200 was not used.

Example 2 and Comparative Example 2 10.0 parts of dioctyl adipate and 5.0 parts of lherdan were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Erasguard 200 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Clay 82.0 in 0.3 parts of organofluorine compound
Parts are mixed and granulated and impregnated at room temperature to absorb the whole amount, and the harmless oil-releasing granules of the present invention (sample-
(Comparative Sample-B) was produced in the same manner except that B) and Erasguard 200 were not used.

Example 3, Comparative Example 3 10.0 parts of diisononyl adipate and 5.0 parts of lherdan were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Erasguard 300 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) Clay in 0.3 parts of organofluorine compound
The small granules obtained by mixing and granulating 0 parts are impregnated at room temperature, the whole amount is absorbed, and the same procedure is carried out except that the oil-free granules having no phytotoxicity of the present invention (Sample C) and Erasguard 300 are not used. (Comparative Sample-C).

Example, Comparative Example 4 10.0 parts of diisodecyl adipate, 5.0 parts of reldan and AM
-001 (Daiichi Kogyo Seiyaku Co., Ltd. water-repellent organic fluorine compound) 0.3 part was mixed, 2.5 parts of PVA was mixed with the mixture, 82.0 parts of clay was mixed with 0.2 parts of sodium dodecylbenzenesulfonate, and the mixture was granulated. The granules were impregnated at room temperature, the whole amount was absorbed, and the same procedure was carried out except that the harmless oil-releasing granules of the present invention (Sample-D) and AM-001 were not used (Comparative Sample-
D) was prepared.

Example 5, Comparative Example 5 10.0 parts of dioctyl adipate and 1.0 part of pyrethroid A were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Erasguard 200 (Daiichi Kogyo Seiyaku Co., Ltd.) were added to the mixture. Water-repellent organic fluorine compound) Clay 86 in 0.3 part
The small granules obtained by mixing and granulating 0 parts were impregnated at room temperature, the whole amount was absorbed, and the same procedure was carried out except that the oil-release granules having no phytotoxicity of the present invention (Sample-E) and Erasguard 200 were not used. (Comparative Sample-E).

Example 6, Comparative Example 6 10.0 parts of octyl adipate and 1.0 part of pyrethroid B were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate and Erasguard 200 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) were added to the mixture. 86.0 clay in 0.3 part of water-repellent organic fluorine compound
Parts are mixed and granulated and impregnated at room temperature to absorb the whole amount, and the harmless oil-releasing granules of the present invention (sample-
(Comparative Sample-F) was produced in the same manner except that F) and Erasguard 200 were not used.

Example 7 and Comparative Example 7 10.0 parts of diisooctyl phthalate and 5.0 parts of Offnac were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Erasguard 200 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd. Clay in 0.3 parts of organofluorine compound
The small granules obtained by mixing and granulating 0 parts are impregnated at room temperature, the whole amount is absorbed, and the same procedure is carried out except that the oleaginous granules having no phytotoxicity of the present invention (Sample-G) and Erasguard 200 are not used. (Comparative Sample-G).

Example 8 and Comparative Example 8 10.0 parts of dioctyl adipate and 3.0 parts of XMC were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Erasguard 200 (produced by Daiichi Kogyo Seiyaku Co., Ltd.) were added to the mixture. Aqueous organofluorine compound) 0.34 parts of clay mixed with 84.0 parts of clay and impregnated at room temperature with granulated small granules to absorb the whole amount, and to give a harmless oil-releasing granule of the present invention (Sample-H) and (Comparative Sample-H) was produced in the same manner except that Erasguard 200 was not used.

Example 9 and Comparative Example 9 10.0 parts of dioctyl adipate, 5.0 parts of spindle oil and 5.0 parts of reldan were mixed, and 2.5 parts of PVA, 0.2 parts of sodium dodecylbenzenesulfonate, and Elasgard 2 were added to the mixture.
00 (Daiichi Kogyo Seiyaku Co., Ltd. water-repellent organic fluorine compound)
0.3 parts, 20 parts of starch, 62.0 parts of clay and 62.0 parts of clay are mixed and granulated and impregnated at room temperature to absorb the whole amount, and the phytotoxic oil-releasing granules of the present invention (Sample-I) and Elasgard Same as above except that 200 was not used (Comparative Sample-I)
Was manufactured.

 Next, effects of the present invention will be described with reference to test examples.

Test Example 1 Samples -A, B, C, D, I (Example 1,
2, 3, 4, 9) and Examples 1, 2, 3,
Comparative Samples Excluding Fluorine Compounds in 4, 9
A, B, C, D, I and 7% granules of basagit were tested for insecticidal effect on rice water weevil and phytotoxicity to rice. The results are shown in Table 1.

Test site: 880 Motomachi, Kagoshima City District system: 3 wards Treatment date: December 17, 1987 Test crop: Rice (variety: Koshihikari) Treatment method: 1 m ² pot with rice planted 9 cm in diameter And the pot is hand-processed with 3 kg of chemicals per 10 ares.

Investigation method: Five, ten, and fifteen days after the treatment, five adults of the rice water weevil were released per pot, and one day later, the life and death of the adults and phytotoxicity to the rice were investigated.

Test Example 2 Samples -B, E, F, G (Examples 2, 5,
6, 7) and Comparative Samples B, E, F, and G in Examples 2, 5, 6, and 7 as Comparative Examples in which the fluorine-based compound was excluded.
And 7% granules of Vasajit were tested for their insecticidal effect on rice water weevil and for phytotoxicity to rice. The results are shown in Table 2.

Test site: 880 Motomachi, Kagoshima City District system: 3 wards Treatment date: January 20, 1988 Test crop: Rice (variety: Koshihikari) Treatment method: 1 m ² pot with rice planted 9 cm in diameter And the pot is hand-processed with 3 kg of chemicals per 10 ares.

Investigation method: Five, ten, and fifteen days after the treatment, five adults of the rice water weevil were released per pot, and one day later, the life and death of the adults and phytotoxicity to the rice were investigated.

Test Example 3 Samples -B, C, D, E (Examples 2, 3,
4, 5) and Comparative Examples B, C, D, and E as Comparative Examples in which the fluorine-based compounds were respectively removed in Examples 2, 3, 4, and 5.
Table 3 shows the results of tests conducted on the insecticidal effect on rice water weevil and the phytotoxicity on rice by using 7% granules of Basagit and cyclosall U granules.

Test site: 880 Motomachi, Kagoshima City District system: 1 are / district 1 district Processing date: April 30, 1988 Test crop: rice (variety: Koshihikari) 4 kg or 2 kg equivalent was hand-processed.

Investigation method: After treatment, 7, 14 and 21 days after the treatment, the presence or absence of adult damage to rice was investigated according to the degree of rice 10 strains / point (3 points / section). The degree of phytotoxicity to rice was investigated 7 and 14 days after treatment. One month later, the number of parasitic larvae was surveyed in six rice plants / section.

Test Example 4 Samples -B, E, F, H (Examples 2, 5,
6, 8) and Comparative Samples B, E, F, and H in Examples 2, 5, 6, and 8 as Comparative Examples in which the fluorine-based compound was excluded.
Was tested for its control effect on the leafhopper, the brown planthopper, the brown planthopper, and the chemical injury to rice. The results are shown in Table 4.

Test site: Suwa, Kamifukumoto-cho, Kagoshima City Ward system: 40m ² / Ward 3 Wards Treatment date: August 4, 1988 Test crop: Rice (variety: Nishihikari) Treatment method: Each drug is used in 10 ares. 4 kg equivalent was hand-processed.

Investigation method: Before and after treatment, 4, 8, and 15 days after the treatment, the population density was examined by 10 strains per ward by the method of sweeping off to a stick board. In addition, phytotoxicity to rice was investigated 4, 8 and 15 days after the treatment.

Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) A01N 25/12 A01N 25/32 CA (STN) REGISTRY (STN) WPIDS (STN)

Claims (4)

(57) [Claims] 1. A composition comprising a water-repellent high-boiling solvent, vegetable oil, mineral part, or a mixture thereof mixed with an organic fluorine-containing compound having a water-repellent action, and one or more pesticidal components. Or impregnating the mixture with a carrier composed of a granular composition formed by molding a mineral powder or a vegetable powder, or one or two or more of a high-boiling solvent, a vegetable oil, a mineral oil, or a mixture thereof that is insoluble in water. At least one kind of insecticidal components are mixed, and the mixture is mixed with a mineral powder or a plant powder, mixed with an organic fluorine compound having a water-repellent action, and impregnated into a carrier made of a molded granular composition. An oil-release pesticide without harm. 2. The vegetable oil is at least one selected from cedar oil, rapeseed oil, corn oil, sesame oil, soybean oil, menzite oil, sunflower oil, castor oil, kiri oil, eno oil, linseed oil, and rice bran oil. The mineral oil is one or more oils selected from spindle oil, kerosene, heavy oil or xylene, and the high boiling point solvent is dioctyl adipate,
Diisononyl adipate, diisodecyl adipate,
The harmless oil-release insecticide granule according to claim 1, which is a solvent selected from diisooctyl phthalate, methyl naphthalene and butyl benzylate. 3. The mineral powder is at least one selected from clay, talc, diatomaceous earth, calcium carbonate and magnesium carbonate, and the plant powder is flour, starch, rice bran, bran, coconut, oil cake The non-phytotoxic oil-releasing insecticide granule according to claim 1, which is at least one selected from the group consisting of: 4. The insecticidal component is pyrethroid A, pyrethroid B, pyrethroid C, reldan or off-nack, XM
The non-phytotoxic oil-release pesticidal granule according to claim 1, which is one or more kinds selected from C.