JP2003095832A - Weed, disease and noxious insect-controlling agent for paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weed, disease and noxious insect-controlling agent for paddy fields. SOLUTION: The weed, disease and noxious insect-controlling agent for paddy fields contains two components consisting of fentrazamide and a component selected from a group consisting of imidacloprid, thiacloprid and carpropamid, or three components consisting of fentrazamide, either of imidacloprid and thiacloprid, and carpropamid as active ingredients.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pest control agent for paddy fields. More specifically, the present invention relates to a control agent for weed diseases and pests for paddy fields, which can control harmful weeds, pests and diseases occurring in paddy fields.

[0002]

2. Description of the Related Art When controlling plant or animal pests in paddy rice cultivation, herbicides, insecticides, fungicides and the like are appropriately used according to the purpose. And when controlling pests at the same time, or when they can be applied at the same time due to their occurrence, etc., and when a synergistic effect can be expected by simultaneous use, multiple types of control agents, especially a mixture of insecticide and fungicide, is used. Has been done. By using this so-called admixture, the number of times of use is reduced as compared with the case of individual use, and labor saving is greatly expected, which can reduce working labor. Further, when a synergistic effect is expected, the concentration of the drug itself can be reduced, and the mixed agent also contains an advantageous element in terms of cost.

Under the favorable conditions of using such a mixture, an attempt has recently been made to achieve the subsequent control of weeds and pests by simultaneously treating the weeds and pests in paddy rice cultivation. However, no admixture has been found that has a satisfactory effect.

[0004]

[Means for Solving the Problems] Under the circumstances described above, the inventors of the present invention have conducted earnest studies to develop a control agent for weed diseases and pests for paddy fields, and as a result, we have found that the active ingredient, fentrazamide, {general name [chemical name] : 4- (2-chlorophenyl) -N-
Cyclohexyl-N-ethyl-4,5-dihydro-5-
Oxo-1H-tetrazole-1-carboxamide]}
And imidacloprid, which is an insecticidal active ingredient, {general name [chemical name: 1- (6-chloro-3-pyridylmethyl) -N-
Nitroimidazolidin-2-ylideneamine]}, thiacloprid which is an insecticidal active ingredient {generic name [chemical name: 3-
(6-chloro-3-pyridylmethyl) -2-thiazolidinylidene-cyanamide]} and bactericidal active ingredient calpropamide {generic name [chemical name: (1R, 3S) -2,2]
-Dichloro-N-[(R) -1- (4-chlorophenyl) ethyl] -1-ethyl-3-methyl-cyclopropanecarboxamide, (1S, 3R) -2,2-dichloro-N-[(R). -1- (4-chlorophenyl) ethyl]
-1-Ethyl-3-methyl-cyclopropanecarboxamide, (1S, 3R) -2,2-dichloro-N-
[(S) -1- (4-chlorophenyl) ethyl] -1-
Ethyl-3-methyl-cyclopropanecarboxamide and (1R, 3S) -2,2-dichloro-N-[(S) -1
-(4-Chlorophenyl) ethyl] -1-ethyl-3-
A mixture of methylcyclopropanecarboxamide} and one component selected from the group consisting of the following: or fentrazamide, and one of imidacloprid or thiacloprid and carpropamide. It was found that when applied later to Honda, an excellent and accurate effect was obtained for controlling both paddy field weeds and paddy rice pests, and the present invention was completed.

Thus, the present invention provides a pesticide for controlling weed diseases for paddy fields, which comprises as active ingredients two components of fentrazamide and one component selected from the group consisting of imidacloprid, thiacloprid and carpropamide. Is.

The present invention also comprises fentrazamide and one component of either imidacloprid or thiacloprid,
The present invention provides a control agent for weed diseases and pests for paddy fields, which contains three components, carpropamide, as an active ingredient.

The present invention will be described in more detail below.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Fentrazamide, which is used as an active ingredient in the combined control agent of the present invention, is a herbicidal active ingredient, imidacloprid, thiacloprid are insecticidal active ingredients, and carpropamide is a bactericidal active ingredient. It is a compound.

In the combined control agent of the present invention, the mixing ratio of each active ingredient is not strictly limited, and the relative ratio may be changed according to the application time, application area, application method, formulation form, etc. of the control agent. Can be varied over a wide range, but generally 0.5-5 parts by weight of imidacloprid and thiacloprid per 1 part by weight of fentrazamide,
Preferably within the range of 0.75 to 3 parts by weight and carpropamide within the range of 1 to 40 parts by weight, preferably 5 to 30 parts by weight.

The combined control agent of the present invention exhibits a strong control effect against both paddy field weeds and rice pests.

Examples of paddy field weeds and paddy rice pests targeted by the control agent of the present invention are as follows. 〇 Dicots of the following genera as paddy field weeds: Polygonum, Polygonum (Rorippa), Scutellaria (Rotala), Asena (Lindernia), Taukogi (Bidens), Abnome (D)
opatrium), genus Takasaburo (Eclipta), genus Mizochabe (Elatine), genus Giant Amber (Gratiola), genus Pepper (Lindernia), genus Ludwigi
a), genus Oenanthe, genus Ranunculu
s), Pepper (Deinostema) and the like.

Monocots of the following genera : Echinochlo
a), genus Panicum, genus Poa
a), Cyperus genus, Cyperus genus (Mono)
choria), genus Fimbristylis, genus Kwai (Sa
gittaria), Harii (Eleocharis), Firefly (Sc
irpus), genus Elisma (Alisma), genus Genus (Ane)
ilema), genus Swine (Blyxa), genus Eriocaulo
n), and the genus Potamogeton.

More specifically, the control agent of the present invention can be used for the following representative paddy field weeds.

Botanical name Latin name Dicotyledonous plant Rottaria indica Koehne Azena Lindernia procumbens Philcox Citrus Ludwigia prostrata Roxburgh Hirumushiro Potamogeton distinctus A. Benn Michaja Ela aciala chora Echoe .. water chestnut Eleocharis Kuroguwai Ohwi smallflower umbrellaplant Cyperus difformis L. Cyperus Cyperus serotinus Rottboel arrowhead Sagittaria pygmaea Miq alisma canaliculatum Alisma canaliculatum A. Br et Bouche bulrush Scirpus juncoides Roxburgh 〇 rice pests as Hemiptera insects: the green rice leafhopper (Nephotettix cincticep
s), the brown planthopper (Nilaparvata lugens), the brown planthopper (Laodelphax striatellus (Fallen)), and the white-bellied planthopper (Sogatella furcifera (Horvath)).

Coleoptera : Oulema oryza
e (Kuwayama), rice weevil (Lissorhoptrus o)
ryzophilus Kuschel) etc. * Rice diseases include blast disease (Pyricularia oryzae).

However, the use of the control agent of the present invention is not limited to these weeds and pests, and can be similarly applied to other paddy field weeds and rice pests.

When the control agent of the present invention is used for controlling paddy field weeds and rice pests, it can be made into a usual formulation. Examples of the dosage form include liquid preparations, emulsions, wettable powders, flowable preparations, wettable granules, wettable granules, concentrated emulsion concentrates, floating granules (jumbo preparations), microcapsules in polymer substances, etc. Can be mentioned.

These formulations can be prepared by methods known per se. For example, each of the above active ingredients may be added as a spreading agent, ie, a liquid diluent and / or a solid diluent,
And, if necessary, the formulations according to the invention can be prepared by further mixing with one another using surfactants, ie emulsifiers and / or dispersants and / or foam formers.

When water is used as the spreading agent, for example, an organic solvent can be used as an auxiliary solvent. As the liquid diluent, for example, aromatic hydrocarbons (for example,
Xylene, toluene, alkylnaphthalene etc.), chlorinated aromatic or chlorinated aliphatic hydrocarbons (eg chlorobenzenes, ethylene chloride, methylene chloride etc.), aliphatic hydrocarbons [eg cyclohexane etc. or paraffins ( Mineral oil fractions, minerals, vegetable oils, etc.), alcohols (eg, butanol, glycol and their ethers or esters), ketones (eg, acetone,
Examples thereof include methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), organic solvents such as a strong polar solvent (eg, dimethylformamide, dimethyl sulfoxide, etc.), and water. Examples of the solid diluent include ammonium salts or soil natural minerals (eg, kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite, diatomaceous earth, etc.), soil synthetic minerals (eg, highly dispersed silicic acid, alumina, silicic acid). Salt, etc.) and the like. In addition, as a solid carrier for granules, for example, crushed and fractionated rock (eg, calcite, marble, pumice, sepiolite, dolomite, etc.), inorganic or organic powder synthetic particles, organic substance fine particles The body (for example, sawdust, coconut coconut, corn cob, tobacco stem, etc.) can be used.

As the emulsifier and / or foaming agent, a nonionic or anionic emulsifier [eg polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers (eg alkylaryl polyglycol ethers, alkyl sulfonates, Alkylsulfates, arylsulfonates, etc.], albumin hydrolysis products and the like.

Suitable dispersants are, for example, lignin sulfite waste liquor and methylcellulose.

Adhesives can also be used in the formulations (powder, granules, emulsions) such as carboxymethyl cellulose, natural or synthetic polymers (eg gum arabic, polyvinyl alcohol, polyvinyl acetates). Etc.), natural phospholipids (for example, cephalins and lecithins), synthetic phospholipids, and the like. Furthermore, mineral oils and vegetable oils can also be used as additives.

Colorants can also be used, and the colorants include inorganic pigments (for example, iron oxide, titanium oxide, Prussian blue, etc.), organic dyes such as alizarin dyes, azo dyes or metal phthalocyanine dyes. And, in addition, trace elements such as iron, manganese, boron, copper, cobalt, molybdenum or zinc salts may be mentioned.

Formulations generally contain a total of 0.1 of the above active ingredients.
It can be contained in a concentration of ˜95% by weight, preferably 0.5 to 90% by weight.

The control agent of the present invention can be used as it is or in the form of its formulation for controlling paddy field weeds and rice pests, and it is also possible to mix each active ingredient in a tank at the time of use. , Other active compounds commonly used in paddy fields, such as fungicides, insecticides and / or herbicides other than those used in the present invention, and plant growth regulators, plant nutrients, soil conditioners, safeners It is also possible to appropriately mix the above.

The control agent of the present invention is used as it is or in the form of a preparation thereof, or in an application form prepared by further diluting the preparation, for example, a ready-to-use solution.
ion), a flowable agent, a jumbo agent, a wettable granule or a granule. The drug in these usage forms can be applied to the paddy field by a method such as undiluted solution hand-scattering, dropping, throwing, or granulating.

The pesticide of the present invention can be applied to the paddy field at the same time as the rice planting or after the rice planting. The amount of said herbicide which can be applied can be varied within a substantial range. The application amount is, for example, 0.3 to 5 kg as the total amount of each active ingredient.
/ Ha, preferably in the range of 0.5 to 3.5 kg / ha.

The excellent effects of the control agent according to the present invention will be described more specifically with reference to the following examples. However, the present invention should not be limited to this.

[0029]

[Examples] Biological test example and formulation example : Test mixture composition composition A: granulation composition of carpropamide 6.7%, imidacloprid 1.7% and fentrazamide 0.7% B: carpropamide 20%, imidacloprid
100 g per pack of 5%, fentrazamide 2% and bensulfuron-methyl 0.51% 100 g granular formulation C: carpropamide 36%, imidacloprid
9% and Fentrazamide 3.7% Flowable Composition D: Carpropamide 20%, Imidacloprid
Granules of 5%, fentrazamide 2% and bensulfuron-methyl 0.51% Among the components of the above composition, bensulfuron-methyl is a sulfonylurea herbicide and is represented by the following chemical name.

Methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl) amino] carbonyl] amino]
Sulfonyl] methyl] benzoate Test Example 1 After mechanically transplanting paddy rice (variety: Koshihikari) seedlings into a paddy field, 0.25 areal sections were provided with a plastic sheet, and a predetermined amount of composition A was applied to the surface of water 7 days after the transplantation. Processed. In order to promote the occurrence of blast, 20 days after transplantation, rice blasts affected by blast were transplanted around the test plots. Novie and leafhoppers were naturally occurring and flying. Process 5
The damage of leaf blast after 0 days and panicle blast after 84 days was investigated for 45 strains per ward, and the control effect against Nobie was investigated after 50 days, and the number of black leafhoppers inhabited for 40 strains per ward after 37 days investigated. The control value of leaf blast was determined by investigating the degree of damage of the lesion area per strain, and the control value of panicle blast was examined by the degree of damage per strain. For Nobie, 100% complete mortality and 0% non-effect were sought to control weeds against untreated plots. In the case of leafhoppers, 40 treated plots were investigated based on the number of inhabitants per 10 untreated plots. , The insecticidal effect was judged. The phytotoxicity to paddy rice was visually judged 50 days after the treatment as a ratio to non-treated. The test was performed in triplicate. The results are shown in Table 1. Test Example 2 After mechanically transplanting rice seedlings (cultivar: Koshihikari) into a paddy field, a section of 1 are each provided with a plastic sheet,
Five days after the transplantation, one pack of the composition B was charged per are and the composition was applied on the water surface. In the same way as in Example 1, in order to promote the occurrence of blast disease, 20 days after transplantation, rice blast diseased with blast disease was transplanted around the test plots. Paddy field weeds and leafhoppers were naturally occurring and flying. The effect and phytotoxicity are the same criteria as in the above-mentioned test example, and the control effect against the leafhopper leafhopper after 40 days of treatment, the leaf blast after 50 days of treatment, the control effect against paddy weeds (Novier, Konagi, Azena, Tamagaya) and the phytotoxicity survey against paddy rice. Carried out. The test was performed in duplicate. The results are shown in Table 2. Test Example 3 Under the same conditions as in Example 2, 50 ml per 1 are of Composition C was applied as a stock solution on the surface of water. Medicinal effect (controlling effect of paddy field weeds against Nobie) and phytotoxicity were determined by the same method as in the above test example. The test was performed in duplicate. The results are shown in Table 3. Test Example 4 After spraying a predetermined amount of the composition D at the time of mechanical transplantation of paddy rice seedlings, the composition was divided into 0.25 ares with a plastic sheet, and the effect on naturally occurring leaf blast disease, panicle blast disease, paddy weeds and leafhopper leafhoppers. The rice seedling simultaneous treatments were examined 50 days, 86 days, 50 days, and 32 days after, respectively, according to the same criteria as in the above test example. Treated for phytotoxicity to paddy rice 50
After the day, it was visually judged as a ratio of no treatment. The test was performed in triplicate. The results are shown in Table 4. result

[0031]

[Table 1]

Formulation Example 1 A mixture of 4 parts by weight of fentrazamide, 6 parts by weight of imidacloprid, 15 parts by weight of carpropamide, 25 parts by weight of bentonite (montmorillonite), 47 parts by weight of talc (talc) and 3 parts by weight of lignin sulfonate, and 25 parts of water. Add parts by weight and knead well, and use an extrusion-type granulator for 10
Granules of ˜40 mesh and dried at 40-50 ° C. to give granules. Formulation Example 2 95 parts by weight of clay mineral particles having a particle size distribution of 0.2 to 2 mm are put into a rotary mixer, and 2 parts by weight of fentrazamide and 3 parts by weight of imidacloprid are sprayed together with a liquid diluent under rotation to make them even. After that, it is dried at 40 to 50 ° C to obtain granules. Formulation Example 3 Fentrazamide 2 parts by weight, imidacloprid 2 parts by weight, carpropamide 20 parts by weight, ethylene glycol 1
0 parts by weight, polyoxyalkylene tristyryl phenyl ether 3 parts by weight, xanthan gum 10 parts by weight, 14%
Silicone oil emulsion 0.5 parts by weight and water 52.
After thoroughly stirring 5 parts by weight of the mixture, the mixture is ground with a grinder (Dynomill KDL type) to give an aqueous suspension preparation. Formulation Example 4 Fentrazamide 5 parts by weight, imidacloprid 5 parts by weight, carpropamide 15 parts by weight, lignin sulfonic acid sodium salt 30 parts by weight, bentonite 15 parts by weight and calcined diatomaceous earth powder 30 parts by weight are sufficiently mixed, and water is added thereto. After thoroughly kneading the mixture, it is extruded through a 0.3 mm screen and dried to give a wettable granule.

[0033]

EFFECTS OF THE INVENTION The control agent for weeds and pests for paddy field of the present invention, as shown in the above-mentioned test example, exhibits an accurate control effect against various paddy field weeds and pests for paddy rice field, and exhibits excellent residual efficacy. Forget

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Claims (4)

[Claims] 1. A control agent for weed diseases and pests for paddy fields, which comprises two components as active ingredients, fentrazamide and one component selected from the group consisting of imidacloprid, thiacloprid and carpropamide. 2. A control agent for weed diseases and pests for paddy fields, which comprises three components of fentrazamide, one component of imidacloprid or thiacloprid, and carpropamide as active ingredients. 3. The control agent according to claim 2, which contains three components of fentrazamide, imidacloprid, and carpropamide as active ingredients. 4. The imidacloprid and thiacloprid are contained in the range of 0.5 to 5 parts by weight and the carpropamide is contained in the range of 1 to 40 parts by weight per 1 part by weight of fentrazamide. The described control agent.