JP2005213270A - Method for suppressing generation of spotted paddy rice caused by stink bug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for suppressing the generation of spotted paddy rice caused by stink bugs, capable of preventing a worker from being exposed to chemical agents and reducing chemical load to the environment and excellent in workability. <P>SOLUTION: This method for suppressing the generation of spotted paddy rice caused by stink bugs comprises applying to the water surface of a paddy field a composition containing at least one compound having penetrating and migrating properties and expressing an inhibitory effect on sapping of stink bugs. In the method, the compound is a nitromethylene-based insecticide, a nitroimino-based insecticide, a cyanoimino-based insecticide or an insecticide having phenylpyrazole skeleton. The nitromethylene-based insecticide is nitenpyram, the nitroimino-based insecticide is imidacloprid, dinotefuran, thiamethoxam or clothianidin, the cyanoimino-based insecticide is thiacloprid, the nitrocyano-based insecticide is acetamiprid and the phenylpyrazole skeleton-having insecticide is fipronyl, ethiprole or acetoprole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for inhibiting the production of spotted rice by stink bugs. More specifically, the present invention relates to a method for preventing the occurrence of stink bugs on the ears of paddy rice and suppressing the production of spotted rice.

  Among the many insect pests on rice, there are hemipods such as planthoppers and stink bugs that have a significant effect on the harvest and quality of rice. Among them, stink bugs have recently become a problem as a pest that damages the ears of paddy rice and degrades the quality of the harvested rice, making it difficult to control. Comparing the effects of planthoppers on paddy rice and the effects of stink bugs on paddy rice, the effects of both on paddy rice are very different. In other words, the damage to paddy rice does not become obvious unless the planthoppers reach a certain density. On the other hand, stink bugs cause serious damage to the quality of harvested rice even at very low density. In general, if two or more rice grains in 1000 rice grains have a sucking trace due to stink bugs, the grade of the rice is lowered as spotted rice. In addition, if a few stink bugs are confirmed per are, the stink bug sucks the ears of paddy rice, resulting in serious damage to the quality of the harvested rice. Therefore, the control of stink bugs is required to have a very high control effect compared to the control of planthoppers.

  These stink bugs enter the paddy field by walking or jumping in and repeat the multiplication, and the ears of rice and certain stink bugs injure the stem. Generally, damage occurs from the flowering of paddy rice to the harvesting season.

  Control of stink bugs is carried out by spraying drugs using a sprayer or by spraying drugs using an aircraft at the time when stink bugs are expected to occur. That is, stink bugs are controlled by spraying powder, liquid, etc. 2-3 times during heading, milk ripening or yellow ripening. In this control method, in order to completely control stink bugs, it was necessary to spray agricultural chemicals two to three times, which was not sufficient in terms of manpower and control costs. In addition, chemical spraying by sprayers and aircraft is a method in which emulsion, wettable powder, powder, etc. are sprayed directly on the foliage where stink bugs are present. The chemical exposure of workers during spraying, difficult working conditions, other than paddy fields There are many problems to be solved, such as the diffusion of the chemicals into the environment, the use of an excessive amount of chemicals to maintain the spraying effect, the deterioration of the control effect due to rainfall, the deviation from the appropriate control time, and the poor work efficiency.

Recently, nitromethylene insecticides such as imidacloprid, nitenpyram, thiamethoxam, thiacloprid, clothianidin, acetamiprid, dinotefuran, etc., insecticides having phenylpyrazole skeletons such as fipronil, ethiprole, acetoprole, etc. Insecticides having osmotic transfer properties have been developed as pest control insecticides for paddy rice. (Japanese Patent Laid-Open Nos. 61-267575, 4-154471, 3-157308, 6-183918, 7-179448, 63-316771, 6-271408, etc.)
These insecticides are in the form of spraying agent and water surface application agent, and can be used for pest control of paddy rice such as planthoppers. It is also described in the publication that some of these insecticides have an insecticidal effect against stink bugs. However, these publications do not disclose anything about preventing the sucking of paddy rice ears by stink bugs and thereby controlling the production of spotted rice by stink bugs.

JP-A 61-267575 Japanese Patent Laid-Open No. 04-154741 JP 03-157308 A Japanese Patent Laid-Open No. 06-183918 Japanese Unexamined Patent Publication No. 07-179448 JP-A-63-316771 Japanese Patent Laid-Open No. 06-271408

  The present invention solves the problems of control of stink bugs by insecticide spraying methods using conventional sprayers, prevents chemical exposure to workers, improves working conditions, prevents diffusion to the environment, is not affected by the weather, etc. An object of the present invention is to provide a method for suppressing the production of spotted rice by stink bugs with excellent workability, and the present invention further prevents the stink bugs from sucking the ears of rice by the method of treating insecticide on the water surface. It is another object of the present invention to provide a method for suppressing the production of spotted rice caused by sucking rice ears by stink bugs.

  As a result of earnestly examining the method for preventing the sucking of stink bugs on the ears of rice by the water surface application method of the composition containing the compound having osmotic transferability, the present inventors have found that the compound having osmotic transferability on the water surface. When treated, it has a sucking-inhibiting effect on stink bugs, and it can sufficiently prevent the stink bugs from sucking on the ears of rice without causing the stink bugs to die completely. The present invention has been completed by finding that the production of can be suppressed.

  That is, the present invention relates to a stink bug characterized by applying a composition containing at least one kind of compound having osmotic transfer properties and exhibiting a sucking inhibitory action to stink bugs to the water surface of a paddy field. This is a method for suppressing the production of spotted rice by paddy rice.

The method of the present invention prevents the damage of stink bugs to the ears of paddy rice, and as a result, can effectively suppress the production of speckled rice and contribute to ensuring the quality of rice.
In addition, since the method of the present invention applies a chemical to the surface of the water, there are problems with conventional control methods for stink bugs, such as prevention of chemical exposure to workers, improvement of working conditions, prevention of diffusion to the environment, and independence from the weather. This can contribute to the simplification of work and the improvement of work conditions.
Furthermore, in the method of the present invention, the absorption of the ears of the ears of stink bug rice is inhibited in an amount smaller than the dose of the drug for killing stink bugs, so that a sufficient amount of the drug is less effective than the dose of the conventional agricultural chemical. Can be obtained, and control costs can be reduced and soil pollution can be prevented.

  The compound showing the control effect on stink bugs used in the present invention is a compound having osmotic transfer properties and showing a sucking inhibitory action on stink bugs. According to the present invention, the compound having osmotic transfer property is that the active compound is absorbed from the roots and foliage of the plant and transferred to other parts of the plant, and the pests absorb the pests and leaves to eat or eat the pests. It is a compound that has the effect of causing death. According to the present invention, the compound having osmotic transfer properties and exhibiting a sucking inhibitory action against stink bugs, the compound permeates and transfers through the plant body, and as a result, the stink bugs do not completely die. , Meaning a compound that can prevent the positive sucking of stink bugs. Such include those conventionally known as insecticidal compounds. Specific examples of compounds used in the method of the present invention include imidacloprid, 3- (2-chlorothiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-ylidene-N- (nitro ) Amine (generic name thiamethoxam), (RS) -1-methyl-2-nitro-3-[(3-tetrahydrofuryl) methyl] guanidine (generic name dinotefuran), (E) -1- (2-chloro-1) , 3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine (generic name clothianidin) and other nitroimino insecticides, nitromethylene insecticides such as nitenpyram, acetamiprid, N- [3- (6-chloro Cyanoimino insecticides such as pyridin-3-ylmethyl) thiazolidine-2-ylidene] cyanamide (generic name thiacloprid) and fipronil, 5-amino-1- (2,6-dichloro-α, α, α-trifluoro-p -Tolyl) -4-ethylsulfinylpyrazole-3-carbonitrile ( (Generic name ethiprole), 1- [5-amino-1- (2,6-dichloro-α, α, α-trifluoro-p-tolyl) -4-methylsulfinylpyrazol-3-yl] ethanone (generic name aceto) Insecticides having a phenylpyrazole skeleton such as (Prolol) can be mentioned, but the compound is not limited to these as long as it is a compound having osmotic transfer properties and a sucking inhibitory action against stink bugs. In the method of the present invention, these compounds are applied to the surface of water against stink bugs alone or in admixture of two or more.

  In order to prevent the stink bugs from sucking into the rice ears, compounds that have osmotic transfer properties and have a sucking inhibitory action against stink bugs can be used on the surface more than the dosage that produces the stink bug sucking inhibitory effect. What is necessary is just to apply. Specifically, if 1 g or more of active ingredient is applied to the water surface per 10 ares, the active ingredient permeates and transfers to paddy rice, and stink bugs have a sucking inhibitory effect. Even if a large amount of active ingredient is applied, it does not affect the expression of stink bug sucking inhibitory effect, but an application amount of 100 g or less is sufficient from an economical point of view. Preferably, an application amount of 10 g or more and 70 g or less of active ingredient per 10 ares is sufficient. If the compound that has osmotic transfer properties and exhibits a sucking inhibitory action against stink bugs is an insecticide, these doses are generally sufficient in amounts less than the amount that the insecticide exhibits an insecticidal effect. It is.

  The timing of applying to the water surface the composition containing the compound having osmotic transfer properties and having a sucking inhibitory action on stink bugs of the present invention may be any time as long as it is within the growing period of paddy rice, preferably If the insecticide is treated on the surface of the water during the period from the time when the rice is divided to the time of yellow ripening, it is possible to effectively prevent stink bugs from sucking the rice. More preferably, the insecticide may be treated during a period from 30 days before heading of rice to 20 days after heading. The method of the present application is usually able to control the sucking of the ears of stink bugs in a single treatment, but depending on the occurrence of stink bugs, even if treated on the water surface, There is no problem.

  According to the present invention, the method of preventing stink bugs from sucking rice ears is a method of applying to the water surface a composition containing a compound having osmotic transfer properties and a stink bug inhibiting action on stink bugs. . As used herein, the method of applying to the water surface means applying the compound directly to the water surface in the form of a composition such as a solid preparation or a liquid preparation. The solid preparation of the compound is applied directly to the water surface, or suspended in water and applied to the water surface in the form of a small amount of liquid or suspension in a high concentration state. Examples include a method of spraying a hand from the shore, a method of encapsulating a granule in a pack and the like, a method of administering this, and a method of water mouth treatment using inflow diffusion of water from the water mouth. The liquid preparation of the compound is treated on the water surface in the same manner as the solid preparation. Examples of solid preparations that can be applied to the water surface include granules, jumbo agents, wettable powders, granular wettable powders, granular water solvents, and powders. Moreover, the dosage form which packed these with water-soluble films, such as PVA, can also be used. Liquid preparations that can be applied to the water surface include emulsions, solutions, oils, flowables, emulsions, microemulsions, suspoemulsions, microcapsules and the like. In any dosage form, when an insecticide that has osmotic transfer properties and exhibits a sucking-inhibiting action on stink bugs is applied to the water surface, the compound permeates into the rice plant and the stink bugs against the ears of paddy rice Absorption can be prevented.

  By the method of the present invention, it is possible to effectively and simply prevent the soup from sucking rice ears by stink bugs. Examples of the stink bugs that can prevent the soup from sucking rice ears include the following. The winged turtle, the horned winged turtle, the red winged turtle, the yellow winged turtle, the spotted turtle, the winged turtle, the red turtle, the turtle, the turtle, , Medaka, stag beetle, stag beetle, horned beetle, horned beetle, white-headed beetle, white-headed beetle , Hirata Leopardus longhorn bug, Sabi Leopardus longhorn bug, Giant longhorn beetle, Vulgaria lepidoptera, Red spotted bug Bark beetles such as worms, kobanhyotanagamekamushi, horned beetles such as phlegm beetle, azuki bean bug, beetle beetle, beetle beetle, beetle, beetle beetle such as beetle beetle, beetle beetle, beetle beetle Spider helicoptercidae, Thai spider helicoptercidae, Hosohelimemushi, etc., Hosohelikamushi, Akahhimeheramemushi, Kebukahimeheramemushi, Scashihimeheramemushi, Himeherikamemushi, etc. Chrysomelidae, shrimp bug, quail stink bug, bark beetle, spotted stink bug, spotted beetle, spotted beetle, spotted shrimp bug, marshirahoshimemushi, otogeshirahoshimemushi, togeshirahoshimushi Hoshikamemushi, brown marmorated stink bug rice bug, garnishing Giro bugs, order Hemiptera, southern green stink bug, Ezo stali, Piezodorus bug, Plautia crossota stali, red bugs, rice black bugs and bugs such as Iwasaki stink bug like. The method of the present invention can effectively prevent the sucking of these stink bugs, particularly the stink bugs that suck the ears of paddy rice.

  By the method of the present invention, the positive sucking activity of stink bugs can be prevented without causing the stink bugs to die completely. Furthermore, it is possible to prevent sucking activity on the ears of paddy rice. As a result, it is possible to suppress the production of rice spotted rice caused by the sucking activity of stink bugs on the ears of rice.

  In actually applying the composition used in the method of the present invention, the composition may be used in combination with other active compounds, for example, bactericides and fertilizers, if necessary. Furthermore, when other active compounds are included, these active compounds preferably have osmotic transfer properties. Representative examples thereof include isoprothiolane, flutolanil, azoxystrobin, probenazole, furamethpyr, tifluzamide, validamycin, pyroxylone, metminostrobin, IBP, fusalide, kasugamycin, carpropamide, dichromedin, tricyclazole, validamycin, pencyclon, mepronil, EDDP, etc. Can be illustrated.

  The formulation of the composition used in the method of the present invention does not require any special conditions, and granule, wettable powder, granule hydration is performed by a method familiar to those skilled in the art according to general agricultural chemicals. It can be prepared in any dosage form such as an agent, a granular water solvent, a powder, an emulsion, a liquid, an oil, a flowable, an emulsion, a microemulsion, a suspoemulsion, and a microcapsule.

  Thus, if a composition containing at least one kind of compound that has osmotic transfer properties and exhibits a sucking inhibitory action on stink bugs is applied to the water surface, the production of spotted rice by stink bugs can be effectively performed. In addition to being able to control, all the problems of the conventional control method using a sprayer such as simplification of farm work, chemical exposure to workers engaged in farm work, diffusion to the environment, and influence of weather can be solved.

  Hereinafter, the present invention will be described in more detail with reference to formulation examples and test examples. In addition, the part in a formulation example shows a weight part.

Formulation Example 1
An emulsion was obtained by uniformly stirring and mixing 10 parts of dinotefuran, 10 parts of Solpol 355S (manufactured by Toho Chemical Co., Ltd., surfactant) and 80 parts of Solvesso 150 (manufactured by Exxon).

Formulation Example 2
10 parts of dinotefuran, 2 parts of sodium alkylnaphthalene sulfonate, 1 part of sodium lignin sulfonate, 5 parts of white carbon, 82 parts of diatomaceous earth were uniformly stirred and mixed to obtain 100 parts of wettable powder.

Formulation Example 3
After 10 parts of dinotefuran and 5 parts of a 20% aqueous solution of polyvinyl alcohol were sufficiently stirred and mixed, 65 parts of a 0.8% aqueous solution of xanthan gum was added and stirred again to obtain 100 parts of a flowable agent.

Formulation Example 4
20 parts of dinotefuran and 90 parts of urea were uniformly and thoroughly mixed to obtain 100 parts of an aqueous solvent.

Formulation Example 5
1 part of dinotefuran, 2 parts of white carbon, 2 parts of sodium lignin sulfonate, 95 parts of bentonite were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Formulation Example 6
1 part of thiacloprid, 2 parts of white carbon, 2 parts of sodium lignin sulfonate and 95 parts of bentonite were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Formulation Example 7
1 part of thiamethoxam, 2 parts of white carbon, 2 parts of sodium lignin sulfonate and 95 parts of bentonite were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Formulation Example 8
1 part of clothianidin, 2 parts of white carbon, 2 parts of sodium lignin sulfonate and 95 parts of bentonite were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Formulation Example 9
1 part of Ethiprole, 2 parts of white carbon, 2 parts of sodium lignin sulfonate and 95 parts of bentonite were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Formulation Example 10
1 part of acetoprole, 2 parts of white carbon, 2 parts of sodium lignin sulfonate, 95 parts of bentonite, and the like were uniformly ground and mixed, then kneaded with water, granulated and dried to obtain 100 parts of granules.

Test Example 1 Effects on stink bugs in heading treatment in pots Grains prepared in Formulation Examples 5 to 10 above, or commercially available products in rice at the heading time (koshihikari: 1 / 5000a pot: managed at a water depth of 3 cm) One Meyer granule, Bestguard granule, Mospiran granule, and Prince granule were sprayed in an amount equivalent to 3 kg / 10a. Seven days after the treatment, only the ears were covered with goose, and 5 males and 5 females were released in the goose (1 ward, 3 continuous). Life or death was determined 6 days after release. In addition, spotted rice was investigated at the time of harvest. As a result of the test, it was found that even if the mortality rate was insufficient and the stink bug did not die, it exhibited a sufficient juice-inhibiting action.

Test Example 2 Effect on stink bugs in heading treatment in pots Rice (Koshihikari: 1 / 5000a pot: managed at a water depth of 3 cm) 10 days before heading the granules prepared in Formulation Example 5 on the surface equivalent to 3 kg / 10a Processed. In addition, the flowable agent prepared in Formulation Example 3 was added to 30 gai. / 10a equivalent amount of water surface was processed. Twenty days after the treatment, only the ears were covered with goose, and 5 males and 5 females were released in the goose (1 ward, 3 continuous). Life or death was determined 6 days after release. As a result of the test, the same amount of sucking inhibition was observed at the same treatment amount regardless of the dosage form.

Claims (4)

  (RS) -1-methyl-2-nitro-3-[(3-tetrahydrofuryl) methyl] guanidine (generic name dinotefuran), (E) -1- (2-chloro-1,3-thiazol-5-ylmethyl) ) -3-Methyl-2-nitroguanidine (generic name clothianidin), N- [3- (6-chloropyridin-3-ylmethyl) thiazolidine-2-ylidene] cyanamide (common name thiacloprid), and 3- (2- A composition containing at least one compound selected from chlorothiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-ylidene-N- (nitro) amine (generic name: thiamethoxam) In the form from 30 days before heading of paddy rice to 20 days after heading, the compound is packed in the form of granules, jumbo, granule wettable powder, granule water solvent, or water-soluble film etc. Inhibits the production of spotted rice by stink bugs, characterized by direct application How.   (RS) -1-methyl-2-nitro-3-[(3-tetrahydrofuryl) methyl] guanidine (generic name dinotefuran), (E) -1- (2-chloro-1,3-thiazol-5-ylmethyl) ) -3-Methyl-2-nitroguanidine (generic name clothianidin), N- [3- (6-chloropyridin-3-ylmethyl) thiazolidine-2-ylidene] cyanamide (common name thiacloprid), and 3- (2- A composition containing at least one compound selected from chlorothiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-ylidene-N- (nitro) amine (generic name: thiamethoxam) During the period from 30 days before heading of paddy rice to 20 days after heading, the compound is in the form of a granule, jumbo agent, granule wettable powder, granule water solvent, or a solid preparation in which these are packed in a water-soluble film, etc. Production of spotted rice by stink bugs, characterized by direct application How to win.   3. A method for suppressing the production of spotted rice by stink bugs according to claim 1 or 2, wherein an amount of 1 g to 100 g of the compound per 10 ares is applied to the water surface of the paddy field.   3. A method for suppressing the production of spotted rice by stink bugs according to claim 1 or 2, wherein an amount of 10 g or more and 70 g or less of the compound per 10 ares is applied to the water surface of the paddy field.