JP4246002B2 - Aphid repellent composition - Google Patents

Description

【００１１】
〔式中、Ｘはハロゲン原子、直鎖でも分岐鎖でもよく、飽和でも不飽和でもよいアルキル基（好ましくは炭素数１〜３）、ハロゲン化アルキル基（好ましくは炭素数１〜３）、アルコキシ基（好ましくは炭素数１〜３）、フェノキシ基、フェニル基、シアノ基、又はニトロ基を表し、Ｘが複数存在する場合は、同一でも異なっていてもよい。ｎは０〜５の数を表し、Ｒは直鎖でも分岐鎖でもよく、飽和でも不飽和でもよいアルキル基（好ましくは炭素数１〜４）、シクロアルキル基（好ましくは炭素数３〜６）、又はアルキル（好ましくは炭素数１〜３）スルフェニル基で置換されたアルキル基（好ましくは炭素数１〜４）を表す。〕
【００１２】
また、本発明は、上記本発明の植物病害虫用忌避剤を含有する水溶液を植物に散布する、植物病害虫の忌避方法に関する。
【００１３】
【発明の実施の形態】
＜（Ａ）成分＞
上記一般式（Ｉ）で表される化合物は、植物成長調整剤（わい化剤）であるウニコナゾールＰとして知られているトリアゾール系化合物を包含する。また、上記一般式（II）で表される化合物は、植物成長調整剤（わい化剤）であるパクロブトラゾールとして知られているトリアゾール系化合物を包含する。しかし、これらの化合物が、植物病害虫、特にアブラムシに対する忌避効果を有することは、従来全く知られていなかった。前記特許文献４においても、当該化合物の病害虫の忌避効果については全く言及されていない。
【００１４】
本発明の植物病害虫用忌避剤は、わい化剤や殺菌剤として供給される量よりも少量でも十分な病害虫の忌避効果が得られる。これは、通常、わい化剤が、ジベレリンの生合成を阻害することでわい化効果が発現する、また殺菌剤が直接菌体に作用するのに対し、本発明で得られる病害虫の忌避効果はこのようなわい化機構とは異なる機構により発現するためであると考えられる。本発明では、（Ａ）成分を植物に供給する（更に吸収される）ことで顕著な病害虫忌避効果が得られる。このことから、本発明の（Ａ）成分は、植物体に何らかの忌避物質を誘導させる開始剤のような役割を果たしていることが推察されるが、その作用機構は必ずしも明らかではない。
【００１５】
本発明では、忌避効果の点で、一般式（Ｉ）の化合物が好ましく、式中のＸが塩素原子、ｎが１、Ｒがｔ−ブチル基である化合物が特に好ましい。
【００１６】
一般式（II）の化合物では、式中のＸが塩素原子、ｎが１、Ｒがｔ−ブチル基である化合物が好ましい。
【００１７】
また、（Ａ）成分の化合物の塩は、臭化水素酸、塩酸、ヨウ化水素酸等のハロゲン化水素酸、酢酸、トリクロロ酢酸、マレイン酸、コハク酸等のカルボン酸、ｐ−トルエンスルホン酸、メタンスルホン酸等のスルホン酸、リン酸などの塩が挙げられる。
【００１８】
本発明の植物病害虫用忌避剤は、（Ａ）成分を０．００００２５〜１００重量％、更に０．０００２５〜１０重量％、特に０．００２５〜１重量％含有することが、製剤化及び忌避効果発現の点で好ましい。
【００１９】
本発明の植物病害虫用忌避剤は、（Ａ）成分以外の成分を含有しなくても十分な効果が発揮できる。実際の使用にあたっては、そのまま、あるいは忌避剤として使いやすくするために担体と混合して施用することができ、通常使用される形態、例えば粉剤、水和剤、油剤、乳剤、錠剤、粒剤、微粉剤、エアゾール剤、液剤、フロアブル剤、水溶液等の何れで使用することもできる。
【００２０】
本発明の植物病害虫用忌避剤の対象となる病害虫としては、特に限定はされないが、アブラムシ類、ダニ類、アザミウマ類等が挙げられ、特にアブラムシの忌避剤として有効である。また、本発明の植物病害虫用忌避剤の対象となる植物としては、特に限定はされないが、ナス科、アブラナ科、ユリ科、マメ科、ウリ科、キク科、セリ科、イネ科、ヒルガオ科、アカザ科、バラ科等の植物が挙げられ、特にアブラナ科の植物として、ダイコン、ハクサイ、カブ、カリフラワー、キャベツ、ブロッコリーが好ましい。例えば、植物がカブでアブラムシの忌避を目的とする場合は、当該植物が本葉二葉展開した時期に、（Ａ）成分が１０ａあたり０．２５〜０．３７５ｇとなるように適当な態様（例えば水溶液等）で供給することが好ましい。
【００２１】
＜その他の成分＞
本発明の植物病害虫用忌避剤は、植物由来の精油成分及び植物由来の香気成分から選ばれる１種以上の成分〔以下、（Ｂ）成分という〕を含有することが忌避効果の速効性の点で好ましい。このうち、植物由来の精油成分としては、スペアミント油、ペパーミント油、ハッカ油、タイム油、ローズマリー油、ジンジャー油、シトロネラ油等が挙げられる。また、植物由来の香気成分としては、１−カルボン、１−メントール、１，８−シネオール、カンファー等が挙げられる。本発明の植物病害虫用忌避剤は、（Ｂ）成分を０．１〜９５重量％、更に１〜７０重量％、特に１０〜５０重量％含有することが、忌避効果及び香気持続性の点で好ましい。
【００２２】
本発明の植物病害虫用忌避剤は、界面活性剤〔以下、（Ｃ）成分という〕を含有することが製剤化及び（Ｂ）成分を配合する場合の香気持続性の点で好ましい。本発明の植物病害虫用忌避剤は、（Ｃ）成分を０．００５〜７０重量％、更に０．０５〜６０重量％、特に０．５〜５０重量％含有することが、製剤化及び（Ｂ）成分を配合する場合の香気持続性の点で好ましい。
【００２３】
界面活性剤としては、非イオン界面活性剤、両性界面活性剤、陰イオン界面活性剤、陽イオン界面活性剤が挙げられる。植物に対する薬害が少ないという点で非イオン界面活性剤が好ましく、非イオン界面活性剤として、ショ糖脂肪酸エステル、ソルビタン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル、グリセリンモノ脂肪酸エステル、ポリグリセリン脂肪酸エステル、ポリエチレングリコール脂肪酸エステル、ポリオキシエチレン硬化ヒマシ油、テトラオレイン酸ポリオキシエチレンソルビット等のエステル型非イオン界面活性剤とアルキルポリグリコシドが特に好ましい。
【００２４】
本発明の植物病害虫用忌避剤は、においの少ないエステル化合物、多価アルコール、多価アルコール脂肪酸エステル、ワックス、多孔質物質及び高分子化合物から選ばれる１種以上の、精油成分又は香気成分の保留剤〔以下、（Ｄ）成分という〕を含有することが好ましい。本発明の植物病害虫用忌避剤は、（Ｄ）成分を０．０２〜９９重量％、更に０．２〜９０重量％、特に２〜８０重量％含有することが、製剤化及び（Ｂ）成分を配合する場合の香気持続性の点で好ましい。
【００２５】
（Ｄ）成分としては、アミルフタレート、ベンジルベンゾエート、エチルベンゾエート、エチルフタレート等のにおいの少ないエステル化合物、グリセリン、マンニトール、ソルビトール、エチレングリコール、ジエチレングリコール、プロピレングリコール、ポリエチレングリコール等の多価アルコール、脂肪酸トリグリセリド、脂肪酸ジグリセリド等の多価アルコール脂肪酸エステル、アルコール脂肪酸エステル等のワックス、シリカ、ゼオライト、デキストリン、シクロデキストリン等の多孔質物質、セルロース、デンプン、ゼラチン、ポリ塩化ビニル、ポリエチレン、ポリエステル、ポリビニルアルコール等の天然もしくは合成の高分子化合物が挙げられる。
【００２６】
＜植物病害虫の忌避方法＞
本発明の植物病害虫用忌避剤は、液体、固体いずれの形態で用いることもできるが、特に水溶液で用いられることが好ましい。かかる水溶液中の（Ａ）成分の濃度は０．０１〜１０ｐｐｍ（重量比）、更に０．１〜５ｐｐｍ（重量比）であることが忌避効果発現の点で好ましい。このような水溶液を植物に散布することで、優れた植物病害虫の忌避効果が得られる。アブラムシについては前記した散布量が好ましい。また、固体の場合は、（Ａ）成分及びその他の成分を、適当な担体に担持させたシート状、ネット状、粉状、粒状、板状、フィルム状などのものが考えられる。
【００２７】
【実施例】
実施例１
本例では、供試虫はモモアカアブラムシ、供試植物はカブとした。園芸用プランターにクレハ園芸用培土（呉羽化学製）を充填し、２条（２列）、１ｃｍ間隔でカブの種（タキイ種苗、品種スワン）を播種した。これを２個用意し、一方は処理区、他方は対照区（未処理区）とした。発芽後、株間隔が２ｃｍとなるように間引きし、最終的に株間４ｃｍ、プランター当たりの株数を２４〜２６株とした。
【００２８】
本葉が２枚展開した後、処理区は、忌避剤として、ウニコナゾールＰ（一般式（Ｉ）中のＸが塩素原子、ｎが１、Ｒがｔ−ブチル基の化合物）を２．５ｐｐｍ（重量比）含有する水溶液を、全体が十分に濡れる量で散布した。次いで、本葉が４枚展開した後に、前記水溶液の２回目の散布を行った。なお、前記水溶液は、界面活性剤（展着剤アプローチＢＩ、花王株式会社製）にウニコナゾールＰ標準品（和光純薬工業株式会社）を０．２５重量％配合した後、７０℃でウニコナゾールＰを完全溶解させ、室温まで冷却したものを、水道水で１０００倍希釈して調製した。また、対照区では、前記界面活性剤の希釈液を散布した。この界面活性剤希釈液は、前記界面活性剤に水を０．２５重量％配合した後、水道水で１０００倍希釈して調製した。
【００２９】
栽培期間中、プランターはガラス温室内に、５０ｃｍの間隔を開けて並列に設置し、潅水は１日１回、定法通りにシャワーによって行った。
【００３０】
２回目の散布から３週間後、処理区及び対照区のカブの苗についてアブラムシ付着数と草丈を計測した。結果を表１に示す。
【００３１】
【表１】

【００３２】
表１に示されるように、本発明の植物病害虫用忌避剤を用いた処理区では、アブラムシの平均付着数は５匹であった。これに対して、対照区では、アブラムシの平均付着数は１３０匹であり、本発明の植物病害虫用忌避剤により、顕著なアブラムシの忌避効果が得られていることがわかる。なお、草丈は、処理区では生育初期にわい化（草丈が減少し、草勢がコンパクトになる現象）が観察されたが、成長に伴い対照区との差が無くなった。
【００３３】
実施例２〜４及び比較例１〜３
本例では、供試虫はモモアカアブラムシ、供試植物はピーマンとした。１２ｃｍポット（ポリエチレン製）にクレハ園芸培土を充填し、ピーマン（品種：京みどり、タキイ種苗製）を播種した。発芽後、間引きを行って、ポット当たりの株数を３株とした。播種から約３週間後、本葉が２枚展開した時期に、表２に示す組成の植物病害虫用忌避剤０．８２ｇを各株の株元（土から茎が出ているところ）に設置した。
【００３４】
その後、アブラムシが繁殖している温室内で通常通りの栽培を行った。植物病害虫用忌避剤を設置してから１１日目と１８日目に、株当たりのアブラムシ付着数を測定した。結果を表２に示す。
【００３５】
【表２】

【００３６】
表２に示されるように、本発明の植物病害虫用忌避剤を用いた実施例２、３及び４では、１１日目のアブラムシ付着数は、３株平均で全て０匹であった。また、実施例２、３及び４では、１８日目のアブラムシ付着数は、３株平均でそれぞれ２、０、０匹であった。これらから、本発明の植物病害虫用忌避剤による明らかな病害虫用忌避効果が確認できる。
【００３７】
一方、本発明の（Ａ）成分を含有しない比較例１、２では、１１日目のアブラムシ付着数は、３株平均で共に３匹であり、１８日目のアブラムシ付着数は、それぞれ３株平均で１３、２５匹であった。更に（Ａ）成分と共に（Ｂ）成分も含有しない比較例３では、１１日目のアブラムシ付着数は、３株平均で３８匹であり、１８日目のアブラムシ付着数は、３株平均で２１３匹であった。
【００３８】
これらから、アブラムシ等の病害虫に対して忌避効果がある（Ｂ）成分を（Ａ）成分と併用することによって、相乗的に忌避効果が高まることが確認できる。
【発明の効果】
本発明によれば、植物病害虫、特にアブラムシに対して優れた忌避効果を示す植物病害虫用忌避剤が得られる。[0001]
BACKGROUND OF THE INVENTION
[0002]
The present invention relates to a plant pest repellent.
[Prior art]
Aphids not only cause growth inhibition and quality degradation on crops and horticultural plants by sucking and fixing, but also cause significant damage to plants by mediating viruses.
[0003]
At present, chemically synthesized pesticides such as organophosphorus insecticides, carbamate insecticides, and pyrethroid insecticides are used to control aphids. However, with these pesticides, aphid growth can be suppressed, but virus transmission cannot be sufficiently prevented. Considering the burden on the environment, it may be desirable to avoid aphids without relying on these pesticides or to reduce the use of pesticides. Furthermore, since aphids pass several tens of generations per year, there is also a problem that drug resistance is likely to develop. There are also concerns about worker safety and persistence in agricultural products.
[0004]
Insects such as aphids may repel certain plant essential oils. If the aphid flight can be suppressed by utilizing the repellent effect of essential oils, the above-described virus transmission, environmental load, drug resistance, and the like can be solved, and thus it is considered highly useful. From this point of view, research has been conducted in the past to apply essential oils to the repellent of plant pests. For example, Patent Documents 1 to 3 describe specific essential oil components or specific compounds in essential oil components as aphids. It is disclosed for use as a repellent.
[0005]
Patent Document 4 discloses the use of a specific triazole compound as a bactericide.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-110623 [Patent Document 2]
Japanese Patent Laid-Open No. 9-263503 [Patent Document 3]
JP 11-49622 A [Patent Document 4]
Japanese Patent Laid-Open No. 54-41875 [0007]
[Problems to be solved by the invention]
However, the repellent effect of aphids by conventional chemically synthesized agricultural chemicals and plant essential oils is not sufficient, and further improvement is desired.
[0008]
An object of the present invention is to provide a repellent having an excellent repellent effect against plant pests, particularly aphids.
[0009]
[Means for Solving the Problems]
The present invention relates to a compound represented by the following general formula (I) and a salt thereof, and one or more compounds selected from the compound represented by the general formula (II) and a salt thereof (hereinafter referred to as component (A)). The present invention relates to a plant pest repellent containing
[0010]
[Chemical formula 2]

[0011]
[Wherein X is a halogen atom, linear or branched alkyl group which may be saturated or unsaturated (preferably having 1 to 3 carbon atoms), halogenated alkyl group (preferably having 1 to 3 carbon atoms), alkoxy Represents a group (preferably having 1 to 3 carbon atoms), a phenoxy group, a phenyl group, a cyano group, or a nitro group, and when a plurality of Xs are present, they may be the same or different. n represents a number of 0 to 5, R may be linear or branched, and may be saturated or unsaturated alkyl group (preferably having 1 to 4 carbon atoms), cycloalkyl group (preferably having 3 to 6 carbon atoms) Or an alkyl group (preferably having 1 to 4 carbon atoms) substituted with an alkyl (preferably having 1 to 3 carbon atoms) sulfenyl group. ]
[0012]
The present invention also relates to a method for repelling plant pests, wherein an aqueous solution containing the repellent for plant pests of the present invention is sprayed on plants.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
<(A) component>
The compound represented by the general formula (I) includes a triazole-based compound known as uniconazole P which is a plant growth regulator (dwarfing agent). Moreover, the compound represented by the said general formula (II) includes the triazole type compound known as paclobutrazol which is a plant growth regulator (dwarf agent). However, it has not been known at all that these compounds have a repellent effect against plant pests, particularly aphids. Even in the above-mentioned Patent Document 4, no mention is made of the repellent effect of the compound on pests.
[0014]
The plant pest repellent of the present invention can provide a sufficient pest repellent effect even if the amount is smaller than the amount supplied as a dwarfing agent or fungicide. This is because the dwarfing agent usually exerts a dwarfing effect by inhibiting the biosynthesis of gibberellin, and the fungicide acts directly on the cells, whereas the repellent effect of the pests obtained in the present invention is This is thought to be due to a mechanism different from the dwarfing mechanism. In the present invention, a remarkable pest repellent effect can be obtained by supplying (further absorbed) the component (A) to the plant. From this, it is surmised that the component (A) of the present invention plays a role as an initiator for inducing some repellent substance in the plant body, but its action mechanism is not necessarily clear.
[0015]
In the present invention, the compound of the general formula (I) is preferable from the viewpoint of repellent effect, and a compound in which X is a chlorine atom, n is 1, and R is a t-butyl group is particularly preferable.
[0016]
In the compound of the general formula (II), a compound in which X is a chlorine atom, n is 1, and R is a t-butyl group is preferable.
[0017]
Further, the salt of the component (A) is a hydrohalic acid such as hydrobromic acid, hydrochloric acid or hydroiodic acid, a carboxylic acid such as acetic acid, trichloroacetic acid, maleic acid or succinic acid, or p-toluenesulfonic acid. And salts of sulfonic acid such as methanesulfonic acid and phosphoric acid.
[0018]
The repellent for plant pests of the present invention contains (0025) 0.000025 to 100% by weight, further 0.00025 to 10% by weight, particularly 0.0025 to 1% by weight. It is preferable in terms of expression.
[0019]
The plant pest repellent of the present invention can exhibit a sufficient effect even if it contains no component other than the component (A). In actual use, it can be applied as it is or mixed with a carrier for easy use as a repellent, and is usually used in a form such as powder, wettable powder, oil, emulsion, tablet, granule, Any of fine powders, aerosols, liquids, flowables, aqueous solutions and the like can be used.
[0020]
The pests targeted by the plant pest repellent of the present invention are not particularly limited, and examples thereof include aphids, mites, thrips and the like, and are particularly effective as aphid repellents. In addition, the plant that is the target of the plant pest repellent of the present invention is not particularly limited, but eggplant, cruciferous, liliaceae, legumes, cucurbitaceae, asteraceae, cereals, gramineous, convolvulaceae , Radish, Chinese cabbage, cauliflower, cabbage, broccoli are preferred as the Brassicaceae plant. For example, when the plant is a turnip and is intended to avoid aphids, an appropriate mode (for example, the component (A) is 0.25 to 0.375 g per 10a at the time when the plant develops two main leaves. It is preferable to supply in an aqueous solution or the like.
[0021]
<Other ingredients>
The repellent for plant pests of the present invention contains one or more components selected from plant-derived essential oil components and plant-derived aroma components (hereinafter referred to as “component (B)”) in terms of fast-acting repellent effect Is preferable. Among these, examples of plant-derived essential oil components include spearmint oil, peppermint oil, mint oil, thyme oil, rosemary oil, ginger oil, citronella oil and the like. Moreover, 1-carvone, 1-menthol, 1,8-cineole, camphor, etc. are mentioned as an aromatic component derived from a plant. The plant pest repellent of the present invention contains component (B) in an amount of 0.1 to 95% by weight, more preferably 1 to 70% by weight, and particularly 10 to 50% by weight in terms of repellent effect and aroma persistence. preferable.
[0022]
The plant pest repellent of the present invention preferably contains a surfactant [hereinafter referred to as component (C)] in terms of formulation and aroma sustainability when component (B) is blended. The plant pest repellent of the present invention contains (C) component in an amount of 0.005 to 70 wt%, further 0.05 to 60 wt%, particularly 0.5 to 50 wt%. ) It is preferable in terms of fragrance sustainability when the component is blended.
[0023]
Examples of the surfactant include nonionic surfactants, amphoteric surfactants, anionic surfactants, and cationic surfactants. Nonionic surfactants are preferred in that they have less phytotoxicity to plants. As nonionic surfactants, sucrose fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, glycerin monofatty acid esters, polyglycerin fatty acid esters, polyethylene Particularly preferred are ester-type nonionic surfactants such as glycol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbite tetraoleate and alkylpolyglycosides.
[0024]
The plant pest repellent of the present invention is a retention of one or more essential oil components or aroma components selected from ester compounds, polyhydric alcohols, polyhydric alcohol fatty acid esters, waxes, porous substances and polymer compounds with low odor. It is preferable to contain an agent [hereinafter referred to as component (D)]. The repellent for plant pests according to the present invention contains 0.02 to 99% by weight, more preferably 0.2 to 90% by weight, particularly 2 to 80% by weight of component (D), and formulation and component (B) It is preferable from the viewpoint of fragrance sustainability when blended.
[0025]
(D) Component includes ester compounds with low odor such as amyl phthalate, benzyl benzoate, ethyl benzoate, ethyl phthalate, polyhydric alcohols such as glycerin, mannitol, sorbitol, ethylene glycol, diethylene glycol, propylene glycol, polyethylene glycol, fatty acid triglycerides , Polyhydric alcohol fatty acid esters such as fatty acid diglycerides, waxes such as alcohol fatty acid esters, porous materials such as silica, zeolite, dextrin, cyclodextrin, cellulose, starch, gelatin, polyvinyl chloride, polyethylene, polyester, polyvinyl alcohol, etc. Examples include natural or synthetic polymer compounds.
[0026]
<Methods to avoid plant pests>
The plant pest repellent of the present invention can be used in either liquid or solid form, but is preferably used in an aqueous solution. The concentration of the component (A) in the aqueous solution is preferably 0.01 to 10 ppm (weight ratio), and more preferably 0.1 to 5 ppm (weight ratio) from the viewpoint of the repellent effect. By spraying such an aqueous solution on plants, an excellent repellent effect of plant pests can be obtained. For aphids, the application rate is preferred. In the case of a solid, a sheet, net, powder, granule, plate, film or the like in which the component (A) and other components are supported on an appropriate carrier can be considered.
[0027]
【Example】
Example 1
In this example, the test insect was a peach aphid and the test plant was a turnip. A horticulture planter was filled with Kureha horticulture soil (Kureha Chemical Co., Ltd.) and seeds of turnip (Takii seedlings, cultivar Swan) were seeded at intervals of 2 rows (2 rows) and 1 cm. Two of these were prepared. One was treated and the other was a control (untreated). After germination, thinning was performed so that the strain interval was 2 cm, and the final strain was 4 cm and the number of strains per planter was 24 to 26 strains.
[0028]
After the development of two true leaves, the treatment group was treated with uniconazole P (a compound in which X in general formula (I) is a chlorine atom, n is 1, and R is a t-butyl group) as a repellent at 2.5 ppm ( (Weight ratio) The aqueous solution contained was sprayed in such an amount that the whole was sufficiently wetted. Subsequently, after four true leaves were developed, the aqueous solution was sprayed for the second time. The aqueous solution was mixed with 0.25% by weight of Uniconazole P standard product (Wako Pure Chemical Industries, Ltd.) in a surfactant (Spreading Agent Approach BI, manufactured by Kao Corporation), and then Uniconazole P was added at 70 ° C. What was completely dissolved and cooled to room temperature was prepared by diluting 1000 times with tap water. In the control group, a diluted solution of the surfactant was sprayed. This surfactant dilution was prepared by blending 0.25% by weight of water with the surfactant and then diluting it 1000 times with tap water.
[0029]
During the cultivation period, the planters were placed in parallel in the glass greenhouse at intervals of 50 cm, and irrigation was performed once a day by a shower as usual.
[0030]
Three weeks after the second spraying, the number of aphids and the plant height were measured for the turnip seedlings in the treated and control groups. The results are shown in Table 1.
[0031]
[Table 1]

[0032]
As shown in Table 1, in the treatment group using the plant pest repellent of the present invention, the average number of aphids attached was 5. In contrast, in the control group, the average number of aphids attached was 130, and it can be seen that a remarkable aphid repellent effect was obtained by the plant pest repellent of the present invention. The plant height was dwarfed (a phenomenon in which the plant height decreased and the plant became compact) in the treated group, but the difference from the control group disappeared with the growth.
[0033]
Examples 2 to 4 and Comparative Examples 1 to 3
In this example, the test insects were peach aphids and the test plants were peppers. A 12 cm pot (made of polyethylene) was filled with Kureha Horticultural soil and seeded with bell peppers (variety: Kyo Midori, Takii seedlings). After germination, thinning was performed to obtain 3 strains per pot. About 3 weeks after sowing, when two true leaves were developed, 0.82 g of repellent for plant pests having the composition shown in Table 2 was placed at the root of each strain (where the stems came out from the soil). .
[0034]
After that, it was cultivated as usual in the greenhouse where aphids were bred. On the 11th and 18th day after the plant pest repellent was installed, the number of aphids attached per strain was measured. The results are shown in Table 2.
[0035]
[Table 2]

[0036]
As shown in Table 2, in Examples 2, 3 and 4 using the plant pest repellent of the present invention, the number of aphids attached on the 11th day was 0 on average for all three strains. In Examples 2, 3 and 4, the number of aphids attached on the 18th day was 2, 0 and 0 on an average of 3 strains, respectively. From these, it is possible to confirm the clear pest repellent effect by the plant pest repellent of the present invention.
[0037]
On the other hand, in Comparative Examples 1 and 2 that do not contain the component (A) of the present invention, the number of aphids attached on the 11th day was 3 on average on 3 strains, and the number of aphids attached on the 18th day was 3 strains each. The average was 13, 25 animals. Further, in Comparative Example 3 which does not contain the component (B) together with the component (A), the number of aphids attached on the 11th day is 38 on average for 3 strains, and the number of aphids attached on the 18th day is 213 on average for 3 strains. There were animals.
[0038]
From these, it can be confirmed that the repellent effect is synergistically increased by using the component (B), which has a repellent effect on pests such as aphids, in combination with the component (A).
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the repellent for plant pests which shows the excellent repellent effect with respect to a plant pest, especially an aphid is obtained.

Claims (4)

A repellent composition for aphids containing uniconazole P and a surfactant, the repellent composition for aphids being used as an aqueous solution containing uniconazole P at a concentration of 0.1 to 5 ppm (weight ratio). The aphid repellent composition according to claim 1, further comprising at least one component selected from plant-derived essential oil components and plant-derived aroma components. The repellent composition for aphids according to claim 2, further comprising a retentive agent for an essential oil component or an aroma component. A method for repelling aphids by spraying a plant with an aqueous solution containing the aphid repellent composition according to any one of claims 1 to 3 , wherein the concentration of uniconazole P in the aqueous solution is 0.1 to 5 ppm. The repellent method that is (weight ratio).