JP5774875B2 - Insecticide composition and method - Google Patents
Insecticide composition and method Download PDFInfo
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- JP5774875B2 JP5774875B2 JP2011044989A JP2011044989A JP5774875B2 JP 5774875 B2 JP5774875 B2 JP 5774875B2 JP 2011044989 A JP2011044989 A JP 2011044989A JP 2011044989 A JP2011044989 A JP 2011044989A JP 5774875 B2 JP5774875 B2 JP 5774875B2
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- insecticide composition
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- Agricultural Chemicals And Associated Chemicals (AREA)
Description
この発明は、殺虫剤組成物及び殺虫方法に関し、さらに詳しくは、殺虫効果に優れるにもかかわらず樹木への負荷が小さく注入作業性にも優れた殺虫剤組成物及び殺虫方法に関する。 The present invention relates to an insecticide composition and an insecticide method, and more particularly, to an insecticide composition and an insecticide method that are excellent in an insecticidal effect but have a small load on a tree and an excellent injection workability.
樹木の成長を阻害し、樹木を枯死させる害虫を防除又は駆除は、従来、害虫に活性を有する殺虫剤を樹木に散布することで、行われていた。 Controlling or controlling a pest that inhibits the growth of the tree and causes the tree to die is conventionally performed by spraying the tree with an insecticide having activity against the pest.
しかし、殺虫剤を均一に散布することは困難であり、必ずしも所期の殺虫効果が得られないことがあった。また、土壌に散布した殺虫剤又は木材に散布した殺虫剤が土壌に移行して、土壌又は地下水等を汚染する等の環境汚染が懸念される。さらに、公園、学校又は市街地等に植栽されている樹木又は街路樹に殺虫剤を散布すると、周辺住民、通行人等に対する薬害等も懸念される。 However, it is difficult to uniformly spray the insecticide, and the desired insecticidal effect may not always be obtained. Moreover, there is a concern about environmental pollution such as the insecticide sprayed on the soil or the insecticide sprayed on the wood moves to the soil and contaminates the soil or groundwater. Furthermore, if insecticides are sprayed on trees or roadside trees planted in parks, schools, urban areas, etc., there are concerns about phytotoxicity to neighboring residents and passersby.
このような問題点を解消する方法として殺虫剤を直接樹木に投与する方法がある。例えば、特許文献１には「以下の工程：（ａ）樹木の樹幹をドリルで穿孔する工程、（ｂ）工程（ａ）において穿孔した孔から浸透性殺虫剤を注入する工程、及び（ｃ）工程（ｂ）において浸透性殺虫剤を注入した孔を塞ぐ工程、を包含する樹木の害虫防除方法」が記載されている。 As a method for solving such a problem, there is a method in which an insecticide is directly administered to a tree. For example, Patent Document 1 includes "the following steps: (a) a step of drilling a tree trunk with a drill, (b) a step of injecting a permeable insecticide from the hole drilled in step (a), and (c). "A method for controlling pests on trees, including a step of closing a hole into which a permeable insecticide is injected in step (b)" is described.
また、特許文献２には「樹幹注入用組成物の有効量を樹木類の樹幹に注入し、樹体内及び葉に分散させることにより、食葉性、吸汁性及び穿孔性の害虫を駆除することからなることを特徴とする害虫から樹木類への加害を防止するための方法」が記載されている（請求項６）。さらに、この方法に使用できる樹幹注入用組成物として「ネオニコチノイド系化合物から選ばれる少なくとも１種の化合物を有効成分とすることを特徴とする害虫から樹木類への加害を防止するための樹幹注入用組成物」が請求項１に記載されている。 In addition, Patent Document 2 discloses that “an effective amount of a composition for injecting a tree trunk is injected into a tree trunk and dispersed in the tree body and leaves to control edible, suckable and piercing pests. "A method for preventing damage from insect pests to trees" characterized in that it comprises: (Claim 6). Furthermore, as a composition for injecting a trunk that can be used in this method, “a trunk for preventing damage from a pest characterized by containing at least one compound selected from neonicotinoid compounds as an active ingredient” An injectable composition is described in claim 1.
特許文献１の方法は、浸透性殺虫剤をそのまま樹木に注入するので殺虫剤の注入完了までに長時間を要し、特に１株当りの注入薬量が多くなるほど殺虫剤の注入時間は長くなる。特許文献２の方法は比較的注入時間を短縮できることがあるが、有機溶剤及び界面活性剤を含有する樹幹注入用組成物を用いると注入時間は必然的に長くなってしまう。このように殺虫剤の注入時間が長くなると、例えば、注入容器などを設置する作業、及び、注入容器などを回収する作業等が必要になって注入作業性に劣ることがある。 In the method of Patent Document 1, since a penetrating insecticide is directly injected into a tree, it takes a long time to complete the injection of the insecticide, and in particular, the injection time of the insecticide becomes longer as the amount of the injected medicine per strain increases. . Although the method of Patent Document 2 can relatively shorten the injection time, the use of a trunk injection composition containing an organic solvent and a surfactant necessarily increases the injection time. Thus, when the injection time of an insecticide becomes long, the operation | work which installs an injection | pouring container etc., the operation | work which collect | recovers an injection | pouring container etc. will be needed, and an injection | pouring workability | operativity may be inferior.
ところで、特許文献２の樹幹注入用組成物は樹体内での分散性を改善して有効成分を樹幹流に溶解させるために「有機溶剤だけでなく界面活性剤」を含有している（特許文献２の００１８欄、実施例欄等）。ところが、樹幹注入用組成物に有機溶剤及び／又は界面活性剤を含有させると、この樹幹注入用組成物を注入した樹木に葉の変色又は落葉等の薬害が生じることがある（例えば、特許文献２の表５及び００３８欄等）。 By the way, the composition for injecting a trunk of Patent Document 2 contains “a surfactant as well as an organic solvent” in order to improve dispersibility in the tree and dissolve the active ingredient in the trunk flow (Patent Document). 2 column 0018, example column, etc.). However, when an organic solvent and / or a surfactant is contained in the composition for injecting a tree trunk, chemical damage such as discoloration of leaves or fallen leaves may occur in the tree injected with the composition for tree trunk injection (for example, patent document). Table 5 and column 0038 of 2).
この発明は、殺虫効果に優れるにもかかわらず樹木への負荷が小さく注入作業性にも優れた殺虫剤組成物及び殺虫方法を提供することを目的とする。 An object of the present invention is to provide an insecticide composition and an insecticidal method which are excellent in insecticidal effect but have a small load on trees and are excellent in injection workability.
前記課題を解決するための手段として、
請求項１は、全質量に対して、５０００〜２５００００ｐｐｍの殺虫成分と、１０〜５０質量％の炭素数１〜４のアルコールと、０．１〜１０質量％のＨＬＢが１２〜２０であるポリエーテル変性シリコーン系界面活性剤とを含有する殺虫剤組成物であり、
請求項２は、前記炭素数１〜４のアルコールが脂肪族アルコールである請求項１に記載の殺虫剤組成物であり、
請求項３は、前記炭素数１〜４のアルコールは、モノアルコールを含む請求項１又は２に記載の殺虫剤組成物であり、
請求項４は、請求項１〜３のいずれか１項に記載の殺虫剤組成物を樹体内に注入する殺虫方法であり、
請求項５は、前記樹体に穿孔された注入孔１個当たり０．１〜５．０ｍＬの前記殺虫剤組成物を注入する請求項４に記載の殺虫方法である。
As means for solving the problems,
Claim 1 is a polyphenol having a pesticidal component of 5000 to 250,000 ppm, an alcohol having 1 to 4 carbon atoms of 1 to 50 % by mass, and an HLB of 0.1 to 10% by mass with respect to the total mass of 12 to 20. An insecticide composition containing an ether-modified silicone surfactant,
Claim 2 is the insecticide composition according to claim 1 , wherein the alcohol having 1 to 4 carbon atoms is an aliphatic alcohol .
Claim 3 is the insecticide composition according to claim 1 or 2, wherein the alcohol having 1 to 4 carbon atoms contains a monoalcohol.
Claim 4 is an insecticidal method for injecting the insecticide composition according to any one of claims 1 to 3 into a tree ,
A fifth aspect of the present invention is the insecticidal method according to the fourth aspect, in which 0.1 to 5.0 mL of the insecticide composition is injected per one injection hole drilled in the tree body .
この発明に係る殺虫剤組成物は、全質量に対して、５０００〜２５００００ｐｐｍの殺虫成分と、１０〜５０質量％の炭素数１〜４のアルコール（以下において、「低級アルコール」と称することがある。）と、０．１〜１０質量％のＨＬＢが１２〜２０であるポリエーテル変性シリコーン系界面活性剤とを含有している。また、この発明に係る殺虫方法はこの発明に係る殺虫剤組成物を樹体内に注入する。そして、この発明に係る殺虫剤組成物が樹体に少量注入されれば高濃度の殺虫成分を樹体に速やかに浸透させて樹木に大きな負荷をかけることなく殺虫成分の効能を十分に発揮させることができる。
The insecticide composition according to the present invention may be referred to as 5000 to 250,000 ppm of an insecticidal component and 10 to 50 % by mass of an alcohol having 1 to 4 carbon atoms (hereinafter referred to as “lower alcohol”). . a), HLB of 0.1 to 10 mass% is contained and a polyether-modified silicone surfactant is 12 to 20. Moreover, the insecticide method which concerns on this invention injects the insecticide composition which concerns on this invention into a tree body. And if a small amount of the insecticide composition according to the present invention is injected into a tree body, a high concentration insecticide component is quickly infiltrated into the tree body, and the effect of the insecticide component is sufficiently exhibited without imposing a heavy load on the tree. be able to.
したがって、この発明によれば、殺虫効果に優れるにもかかわらず樹木への負荷が小さく注入作業性にも優れた殺虫剤組成物及び殺虫方法を提供することができる。 Therefore, according to the present invention, it is possible to provide an insecticidal composition and an insecticidal method which are excellent in the insecticidal effect but have a small load on the tree and excellent in injection workability.
この発明に係る殺虫剤組成物は、樹木を害する害虫に活性を有する殺虫成分と低級アルコールとシリコーン系界面活性剤とを含有している。したがって、この発明に係る殺虫剤組成物は殺虫成分と低級アルコールとシリコーン系界面活性剤とを含有する殺虫剤と称することができる。 The insecticide composition according to the present invention contains an insecticidal component having activity against pests that damage trees, a lower alcohol, and a silicone surfactant. Therefore, the insecticide composition according to the present invention can be referred to as an insecticide containing an insecticide component, a lower alcohol, and a silicone surfactant.
前記殺虫成分は、樹木を害する害虫に対して活性を有する成分であれば特に限定されず、例えば、ネオニコチノイド系化合物、有機リン系化合物などの殺虫活性を有する化合物が挙げられる。したがって、この発明に係る殺虫剤組成物は、殺虫成分として、ネオニコチノイド系化合物、有機リン系化合物などの殺虫活性を有する化合物からなる群より選択される少なくとも１種を含んでいるのが好ましい。 The insecticidal component is not particularly limited as long as it has activity against pests that damage trees, and examples thereof include compounds having insecticidal activity such as neonicotinoid compounds and organophosphorus compounds. Therefore, the insecticide composition according to the present invention preferably contains at least one selected from the group consisting of compounds having insecticidal activity such as neonicotinoid compounds and organophosphorus compounds as insecticide components. .
ネオニコチノイド系化合物としては、チアメトキサム、クロチアニジン、ジノテフラン、アセタミプリド、イミダクロプリドなどが挙げられる。 Examples of neonicotinoid compounds include thiamethoxam, clothianidin, dinotefuran, acetamiprid, imidacloprid and the like.
有機リン殺虫性化合物としては、フェニトロチオン、ダイアジノン、マラチオン、メチダチオン、プロチオホス、アセフェート、トリクロルホンなどが挙げられる。 Examples of the organophosphorus insecticidal compound include fenitrothion, diazinon, malathion, methidathione, prothiophos, acephate, trichlorphone and the like.
この殺虫成分は、この発明に係る殺虫剤組成物は特に公園、学校又は市街地等に植栽されている樹木又は街路樹に好適に注入されるので、このような樹木又は街路樹に寄生する害虫に対する活性を有するのが好ましく、このような殺虫成分として、クロチアニジン、ジノテフラン、フェニトロチオン、ダイアジノン、アセフェート、トリクロルホンなどが挙げられる。 This insecticidal component is preferably injected into a tree or a roadside tree planted in a park, school or city area, etc., particularly because the insecticide composition according to the present invention is a pest parasitic on such a tree or roadside tree. Such insecticidal components include clothianidin, dinotefuran, fenitrothion, diazinon, acephate, trichlorphone and the like.
この殺虫成分は、使用目的、注入対象樹木に寄生する害虫などに応じて適宜の成分が選択されるが、液状の殺虫成分を含有するこの発明に係る殺虫剤組成物は極めて速やかに樹木に浸透すなわち吸収されるので、浸透時間の短縮に特に着目するのであればこの発明に係る殺虫剤組成物に含有される殺虫成分は液状であるのが好ましい。 As this insecticidal component, an appropriate component is selected according to the purpose of use, pests parasitic on the injection target tree, etc., but the insecticide composition according to the present invention containing a liquid insecticidal component penetrates the tree very quickly. That is, since it is absorbed, it is preferable that the insecticidal component contained in the insecticidal composition according to the present invention is in a liquid form, when paying particular attention to shortening the permeation time.
この殺虫成分は、この発明に係る殺虫剤組成物の全質量に対して５０００〜２５００００ｐｐｍの質量割合で含有されている。この発明に係る殺虫剤組成物は速やかに樹体内に浸透するから殺虫成分を前記範囲の高濃度で含有することができる。この発明において、殺虫剤組成物中の殺虫成分の含有率が５０００ｐｐｍ未満であると殺虫成分の薬効が十分に発揮されない場合があり、一方、２５００００ｐｐｍを越えると注入対象木に縮葉、落葉、注入部の癒合阻害などの薬害が発生する場合がある。この発明において、効果、薬害、注入量の削減の観点から、殺虫剤組成物中の殺虫成分の含有率は、殺虫剤組成物の全質量に対して１００００〜２５００００ｐｐｍであるのが好ましく、５００００〜２０００００ｐｐｍであるのが特に好ましい。 This insecticidal component is contained in a mass ratio of 5000 to 250,000 ppm with respect to the total mass of the insecticide composition according to the present invention. Since the insecticide composition according to the present invention quickly penetrates into the tree body, the insecticide component can be contained at a high concentration within the above range. In the present invention, if the content of the insecticidal component in the insecticidal composition is less than 5000 ppm, the medicinal effect of the insecticidal component may not be sufficiently exerted. There are cases where phytotoxicity such as inhibition of fusion of the part occurs. In this invention, from the viewpoint of effect, phytotoxicity, and reduction of injection amount, the content of the insecticidal component in the insecticide composition is preferably 10,000 to 250,000 ppm with respect to the total mass of the insecticide composition, Particularly preferred is 200,000 ppm.
この殺虫成分として殺虫成分を含有する市販の薬剤を用いる場合には、薬剤中の殺虫成分の濃度を考慮して殺虫成分の殺虫剤組成物中の含有率が前記範囲内になるように、市販の薬剤の使用量すなわち含有率が決定される。例えば、市販の薬剤は、殺虫剤組成物の全質量に対して０．５〜２５質量％、好ましくは５〜２０質量％の含有率で、低級アルコール及びシリコーン系界面活性剤と混合される。 When using a commercially available drug containing an insecticidal component as the insecticidal component, considering the concentration of the insecticidal component in the drug, the content of the insecticidal component in the insecticidal composition is within the above range. The amount of the drug used, that is, the content rate is determined. For example, a commercially available drug is mixed with a lower alcohol and a silicone surfactant at a content of 0.5 to 25% by mass, preferably 5 to 20% by mass, based on the total mass of the insecticide composition.
低級アルコールは、炭素数が１〜４のアルコールであるのが好ましく、炭素数が１〜４の脂肪族アルコールであるのがさらに好ましく、樹体内への浸透速度が速い点で炭素数が１〜４の脂肪族モノアルコールであるのが特に好ましい。したがって、この発明において、低級アルコールは、好ましくは炭素数が１〜４のアルコールを含んでおり、さらに好ましくは炭素数が１〜４の脂肪族アルコールを含んでおり、樹体内への浸透速度が速い点で特に好ましくは炭素数が１〜４の脂肪族モノアルコールを含んでいる。炭素数が１〜４のアルコールとしては、具体的には、メチルアルコール、エチルアルコール、ｎ−プロピルアルコール、ｉｓｏ−プロピルアルコール、ｎ−ブチルアルコール、ｓｅｃ−ブチルアルコール、ｉｓｏ−ブチルアルコール、ｔｅｒｔ−ブチルアルコールが挙げられる。炭素数が１〜４のアルコールは、樹体内への浸透速度が速い点で、メチルアルコール、エチルアルコールであるのが好ましく、エチルアルコールが特に好ましい。すなわち、この発明において、低級アルコールは、メチルアルコール、エチルアルコールを含むのが好ましく、エチルアルコールを含むのが特に好ましい。 The lower alcohol is preferably an alcohol having 1 to 4 carbon atoms, more preferably an aliphatic alcohol having 1 to 4 carbon atoms, and 1 to 1 carbon atoms in that the penetration rate into the tree is fast. 4 aliphatic monoalcohols are particularly preferred. Therefore, in this invention, the lower alcohol preferably contains an alcohol having 1 to 4 carbon atoms, more preferably an aliphatic alcohol having 1 to 4 carbon atoms, and has a penetration rate into the tree. From the standpoint of rapidity, an aliphatic monoalcohol having 1 to 4 carbon atoms is particularly preferred. Specific examples of the alcohol having 1 to 4 carbon atoms include methyl alcohol, ethyl alcohol, n-propyl alcohol, iso-propyl alcohol, n-butyl alcohol, sec-butyl alcohol, iso-butyl alcohol, and tert-butyl. Examples include alcohol. The alcohol having 1 to 4 carbon atoms is preferably methyl alcohol or ethyl alcohol, and particularly preferably ethyl alcohol in terms of a high penetration rate into the tree. That is, in this invention, the lower alcohol preferably contains methyl alcohol and ethyl alcohol, and particularly preferably contains ethyl alcohol.
この低級アルコールは、この発明に係る殺虫剤組成物の全質量に対して１０〜９９．８質量％の割合で含有されている。この発明において、殺虫剤組成物中の低級アルコールの含有率が１０質量％未満であると殺虫剤組成物の注入速度すなわち浸透速度を十分に改善できない場合があり、一方、９９．８質量％を越えると殺虫成分と同様に注入対象木に縮葉、落葉、注入部の癒合阻害などの薬害が発生する場合がある。この発明において、殺虫剤組成物中の低級アルコールの含有率は、注入速度の向上及び注入対象木への安全性の観点から、殺虫剤組成物の全質量に対して１０〜５０質量％であるのが好ましく、１０〜２０質量％であるのが特に好ましい。 This lower alcohol is contained in a proportion of 10 to 99.8% by mass with respect to the total mass of the insecticide composition according to the present invention. In this invention, when the content of the lower alcohol in the insecticide composition is less than 10% by mass, the injection rate of the insecticide composition, that is, the penetration rate may not be sufficiently improved, while 99.8% by mass is reduced. If exceeded, phytotoxicity such as shrinkage, fallen leaves, and inhibition of fusion at the injection site may occur in the injection target tree as well as the insecticidal component. In this invention, the content rate of the lower alcohol in an insecticide composition is 10-50 mass% with respect to the total mass of an insecticide composition from a viewpoint of the improvement of injection | pouring speed | rate and the safety | security to an injection | pouring object tree. Is preferable, and it is especially preferable that it is 10-20 mass%.
シリコーン系界面活性剤は、特に限定されないが、水に溶解しやすく樹体内への浸透速度が速く、樹木への負荷も小さい点で親水性のシリコーン系界面活性剤であるのが好ましい。したがって、この発明において、シリコーン系界面活性剤は親水性のシリコーン系界面活性剤を含んでいるのが好ましい。親水性のシリコーン系界面活性剤としては、例えば、アミン変性シリコーン系界面活性剤、ポリエーテル変性シリコーン系界面活性剤などが好適に挙げられ、浸透速度に加えて取扱性にも優れ、この発明の目的をよく達成できる点で、ポリエーテル変性シリコーン系界面活性剤が特に好適に挙げられる。アミン変性シリコーン系界面活性剤は、主鎖又は側鎖がアミン化合物で変性されたシリコーン系界面活性剤であり、例えば、モノアミン、ジアミン、特殊アミンなどのアミン化合物で変性されたシリコーン系界面活性剤などが挙げられる。また、ポリエーテル変性シリコーン系界面活性剤は、主鎖又は側鎖がポリエーテルで変性されたシリコーン系界面活性剤であり、例えば、アラルキル、フロロアルキル、長鎖アルキル、高級脂肪酸エステル、高級脂肪酸アミド、ポリエーテル・長鎖アルキル・アラルキル、長鎖アルキル・アラルキル、フェニルで変性されたシリコーン系界面活性剤などが挙げられる。 The silicone-based surfactant is not particularly limited, but is preferably a hydrophilic silicone-based surfactant because it is easily dissolved in water, has a high penetration rate into the tree, and has a small load on the tree. Therefore, in this invention, it is preferable that the silicone surfactant contains a hydrophilic silicone surfactant. As the hydrophilic silicone surfactant, for example, an amine-modified silicone surfactant, a polyether-modified silicone surfactant and the like are preferably mentioned. In addition to the permeation rate, the handling property is excellent. A polyether-modified silicone surfactant is particularly preferable because it can achieve the object well. The amine-modified silicone surfactant is a silicone surfactant whose main chain or side chain is modified with an amine compound, for example, a silicone surfactant modified with an amine compound such as monoamine, diamine, or special amine. Etc. The polyether-modified silicone surfactant is a silicone surfactant whose main chain or side chain is modified with a polyether, such as aralkyl, fluoroalkyl, long-chain alkyl, higher fatty acid ester, higher fatty acid amide. And polyether / long-chain alkyl / aralkyl, long-chain alkyl / aralkyl, and silicone-based surfactants modified with phenyl.
このようなアミン変性シリコーン系界面活性剤としては、具体的には、モノアミン変性シリコーン系界面活性剤（商品名「ＫＦ−８６８」、信越化学工業株式会社製）、モノアミン変性シリコーン系界面活性剤（商品名「ＫＦ−８６５」、信越化学工業株式会社製）およびジアミン変性シリコーン系界面活性剤（商品名「ＫＦ−８５９」、信越化学工業株式会社製）などが挙げられる。また、ポリエーテル変性シリコーン系界面活性剤としては、具体的には、ポリエーテル変性シリコーンオイル（商品名「Ｘ−２２−４５１５」、ＨＬＢ５、信越化学工業株式会社製）、ポリエーテル変性シリコーンオイル（商品名「ＫＦ−３５３」、ＨＬＢ１０、信越化学工業株式会社製）、ポリエーテル変性シリコーンオイル（商品名「ＫＦ−６４２」、ＨＬＢ１２、信越化学工業株式会社製）、ポリエーテル変性シリコーンオイル（商品名「ＫＦ−６４０」、ＨＬＢ１４、信越化学工業株式会社製）、ポリエーテル変性シリコーンオイル（商品名「ＫＦ−３５４Ｌ」、ＨＬＢ１６、信越化学工業株式会社製）などが挙げられる。 As such an amine-modified silicone surfactant, specifically, a monoamine-modified silicone surfactant (trade name “KF-868”, manufactured by Shin-Etsu Chemical Co., Ltd.), a monoamine-modified silicone surfactant ( Examples include trade name “KF-865”, manufactured by Shin-Etsu Chemical Co., Ltd.) and diamine-modified silicone surfactant (trade name “KF-859”, manufactured by Shin-Etsu Chemical Co., Ltd.). Specific examples of polyether-modified silicone surfactants include polyether-modified silicone oil (trade name “X-22-4515”, HLB5, manufactured by Shin-Etsu Chemical Co., Ltd.), polyether-modified silicone oil ( Trade name “KF-353”, HLB10, manufactured by Shin-Etsu Chemical Co., Ltd., polyether-modified silicone oil (trade name “KF-642”, HLB12, manufactured by Shin-Etsu Chemical Co., Ltd.), polyether-modified silicone oil (trade name) “KF-640”, HLB14, manufactured by Shin-Etsu Chemical Co., Ltd.), polyether-modified silicone oil (trade name “KF-354L”, HLB16, manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.
この発明において、親水性のシリコーン系界面活性剤は、例えば、ＨＬＢが５〜２０、好ましくは１２以上のシリコーン系界面活性剤と別言することもできる。ここで、ＨＬＢは、親水親油バランスとも称され、グリフィン法によって測定される値である。 In the present invention, the hydrophilic silicone surfactant may be referred to as a silicone surfactant having an HLB of 5 to 20, preferably 12 or more. Here, HLB is also referred to as hydrophilic / lipophilic balance, and is a value measured by the Griffin method.
シリコーン系界面活性剤は、この発明に係る殺虫剤組成物の全質量に対して０．１〜１０質量％の割合で含有されている。この発明において、殺虫剤組成物中のシリコーン系界面活性剤の含有率が０．１質量％未満であると殺虫剤組成物の注入速度すなわち浸透速度を十分に改善できない場合があり、一方、１０質量％を越えると殺虫成分と同様に注入対象木に縮葉、落葉、注入部の癒合阻害などの薬害が発生する場合がある。この発明において、殺虫剤組成物中のシリコーン系界面活性剤の含有率は、注入速度の向上及び注入対象木への安全性の観点から、殺虫剤組成物の全質量に対して０．５〜５質量％であるのが好ましく、０．５〜２質量％であるのが特に好ましい。 The silicone-based surfactant is contained at a ratio of 0.1 to 10% by mass with respect to the total mass of the insecticide composition according to the present invention. In the present invention, when the content of the silicone surfactant in the insecticide composition is less than 0.1% by mass, the injection rate, that is, the penetration rate of the insecticide composition may not be sufficiently improved. If the mass% is exceeded, phytotoxicity such as shrinkage, defoliation, and inhibition of fusion at the injection site may occur in the injection target tree in the same manner as the insecticidal component. In this invention, the content rate of the silicone-based surfactant in the insecticide composition is from 0.5 to the total mass of the insecticide composition from the viewpoint of improving the injection rate and safety to the injection target tree. It is preferably 5% by mass, particularly preferably 0.5 to 2% by mass.
この発明に係る殺虫剤組成物は、殺虫成分、低級アルコール及びシリコーン系界面活性剤の外に、必要に応じて、安定剤、ｐＨ調整剤、被膜形成剤、水、シリコーン系界面活性剤以外の界面活性剤、低級アルコール以外の溶剤などを含有していてもよい。必要に応じて含有される成分は、この成分、殺虫成分、低級アルコール及びシリコーン系界面活性剤の合計が１００質量％となる割合で、含有される。 In addition to the insecticidal component, the lower alcohol and the silicone surfactant, the insecticide composition according to the present invention, if necessary, other than the stabilizer, the pH adjuster, the film forming agent, water, and the silicone surfactant. A surfactant and a solvent other than the lower alcohol may be contained. The component contained as needed is contained in such a proportion that the total of this component, the insecticidal component, the lower alcohol and the silicone surfactant is 100% by mass.
安定剤は、この発明に係る殺虫剤組成物に含まれていると製剤の安定性及び分散性を保持することができるので、好適に含有される。安定剤としては、例えば、ＢＨＴ、ＤＢＨＱ、トコフェロールなどの酸化防止剤が主として挙げられる。 When the stabilizer is contained in the insecticide composition according to the present invention, the stabilizer can be preferably contained since the stability and dispersibility of the preparation can be maintained. Examples of the stabilizer mainly include antioxidants such as BHT, DBHQ, and tocopherol.
前記ｐＨ調整剤としては、例えば、酸、アルカリ及びその塩などが挙げられ、前記被膜形成剤としては、例えば、ポリビニルアルコール、ポリ酢酸ビニル樹脂、ポリウレタン樹脂などが挙げられる。 Examples of the pH adjuster include acids, alkalis and salts thereof, and examples of the film forming agent include polyvinyl alcohol, polyvinyl acetate resin, and polyurethane resin.
シリコーン系界面活性剤以外の界面活性剤は、ノニオン系界面活性剤、アニオン系界面活性剤及びカチオン系界面活性剤などを挙げることができる。前記ノニオン系界面活性剤としては、ポリオキシエチレンアルキルアリルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシエチレン脂肪酸エステル、ソルビタン脂肪酸エステル、ショ糖脂肪酸エステル、ポリオキシエチレン硬化ヒマシ油エーテルなどが挙げられる。前記アニオン系界面活性剤としては、アルキルベンゼンスルホン酸塩、アルキル硫酸エステル塩、ジアルキルスルホコハク酸、高級脂肪酸塩などを挙げることができる。カチオン系界面活性剤としては、アルキルアミン類、第４級アンモニウム塩、アルキルピリジニウム塩などを挙げることができる。 Examples of surfactants other than silicone surfactants include nonionic surfactants, anionic surfactants, and cationic surfactants. Examples of the nonionic surfactant include polyoxyethylene alkyl allyl ether, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene hydrogenated castor oil ether, and the like. Examples of the anionic surfactant include alkyl benzene sulfonate, alkyl sulfate ester salt, dialkyl sulfosuccinic acid, and higher fatty acid salt. Examples of the cationic surfactant include alkyl amines, quaternary ammonium salts, and alkyl pyridinium salts.
低級アルコール以外の溶剤としては、殺虫成分を溶解することができる限り特に制限がなく、親水性溶剤であっても親油性溶剤であってもよい。 The solvent other than the lower alcohol is not particularly limited as long as it can dissolve the insecticidal component, and may be a hydrophilic solvent or a lipophilic solvent.
親水性溶剤すなわち水と混和する溶剤としては、例えば、エチレングリコール、プロピレングリコール及びジエチレングリコールなどのグリコール類、前記グリコール類のエステル類及び前記グリコール類のエーテル類、前記グリコール類の誘導体、前記グリコール類のエステル類の誘導体、前記グリコール類のエーテル類の誘導体、シクロヘキサノン、アセトン及びメチルエチルケトンなどのケトン類、酢酸エチル及び酢酸ブチルなどのカルボン酸エステル類、ジメチルスルホキシドなどのスルホキシド類、グリセリン、グリセリンのエステル誘導体、グリセリンのエーテル誘導体、Ｎ−メチルピロリドンなどのピロリドン類、アセトニトリルなどのニトリル類、テトラヒドロフラン及びジオキサンなどの環状エーテル類などを挙げることができる。 Examples of the hydrophilic solvent, that is, a solvent miscible with water include glycols such as ethylene glycol, propylene glycol and diethylene glycol, esters of the glycols and ethers of the glycols, derivatives of the glycols, and derivatives of the glycols. Derivatives of esters, derivatives of ethers of the glycols, ketones such as cyclohexanone, acetone and methyl ethyl ketone, carboxylic acid esters such as ethyl acetate and butyl acetate, sulfoxides such as dimethyl sulfoxide, ester derivatives of glycerin and glycerin, List glycerol ether derivatives, pyrrolidones such as N-methylpyrrolidone, nitriles such as acetonitrile, cyclic ethers such as tetrahydrofuran and dioxane, etc. It can be.
親油性溶剤としては、例えば、ベンゼン、トルエン、キシレン及びベンジルアルコールなどの芳香族化合物、へキサンなどの環状脂肪族炭化水素、パラフィン系、ケトン系、エステル系、グリコール系などの高沸点溶剤、菜種油、大豆油、オリーブ油、魚油、肝油、ラノリンのような動植物性油脂、オレイン酸、ラノリン酸、及びパルミチン酸などの脂肪酸、前記脂肪酸の誘導体などを挙げることができる。 Examples of the lipophilic solvent include aromatic compounds such as benzene, toluene, xylene and benzyl alcohol, cycloaliphatic hydrocarbons such as hexane, paraffinic, ketone-based, ester-based and high-boiling solvents such as glycol-based, rapeseed oil. And fatty acids such as soybean oil, olive oil, fish oil, liver oil, and lanolin, fatty acids such as oleic acid, lanolinic acid, and palmitic acid, and derivatives of the fatty acids.
この発明に係る殺虫剤組成物は、全質量に対して１０〜９９．８質量％の低級アルコールと全質量に対して０．１〜１０質量％のシリコーン系界面活性剤と全質量に対して５０００〜２５００００ｐｐｍの高濃度で殺虫成分を含有する原液の形態であってもよく、また、殺虫成分、低級アルコール及びシリコーン系界面活性剤それぞれが全質量に対して前記含有率となるように適宜に希釈された希釈溶液であってもよい。すなわち、この発明に係る殺虫剤組成物は、原液として存在し、またその原液を希釈してなる希溶液として存在することができる。さらに、この発明に係る殺虫剤組成物は、乳剤、フロアブル、マイクロエマルション、エマルションオイルインウォータ、サスポエマルションの形態であってもよい。この発明に係る殺虫剤組成物は、現場での取扱性及び施行容易性の点で、これらの中でも原液又は希釈溶液の形態が好ましい。 The insecticide composition according to the present invention comprises 10 to 99.8% by weight of a lower alcohol and 0.1 to 10% by weight of a silicone surfactant and the total weight of the total weight. It may be in the form of a stock solution containing an insecticidal component at a high concentration of 5,000 to 250,000 ppm, and the insecticidal component, the lower alcohol, and the silicone-based surfactant are appropriately selected so as to have the above-mentioned content with respect to the total mass. It may be a diluted solution. That is, the insecticide composition according to the present invention exists as a stock solution and can exist as a dilute solution obtained by diluting the stock solution. Furthermore, the insecticide composition according to the present invention may be in the form of an emulsion, flowable, microemulsion, emulsion oil in water, or suspoemulsion. Among these, the insecticide composition according to the present invention is preferably in the form of a stock solution or a diluted solution from the viewpoint of handling on site and ease of enforcement.
この発明に係る殺虫剤組成物は、液状の形態である場合に原液のまま使用されることができ、また所定の割合に希釈された希釈液又は水和剤として使用されることもできる。 The insecticide composition according to the present invention can be used as a stock solution when it is in a liquid form, or can be used as a diluted solution or a wettable powder diluted to a predetermined ratio.
この発明に係る殺虫剤組成物は、液状の形態である場合に、樹木に対して、散布、塗布、株元施用、潅注処理、樹幹注入などにより投与されることができる。この発明に係る殺虫剤組成物を樹木に対してどのように投与するかは、使用状況に応じて、又は、樹木の状態に応じて適宜に決定することができる。 When the insecticide composition according to the present invention is in a liquid form, it can be administered to a tree by spraying, coating, application at the base, irrigation treatment, trunk injection, or the like. How to administer the insecticide composition according to the present invention to a tree can be appropriately determined according to the use situation or according to the state of the tree.
この発明に係る殺虫方法は、この発明に係る殺虫剤組成物を樹木に投与、散布又は注入することができる投与方法、散布方法又は注入方法であればよい。この発明に係る殺虫剤組成物の好適な処理方法つまり使用方法としては、ドリルなどを用いて樹木に開けた注入用の穴（以下、注入穴と称することがある。）に、又は、害虫が樹木に開穿した穿孔に、すなわち樹体内に、この発明に係る殺虫剤組成物を注入する方法が挙げられる。このようにこの発明に係る殺虫剤組成物を注入穴又は穿孔に注入すると、殺虫成分が樹全体に拡散し、その殺虫成分に害虫が接触又は殺虫成分を害虫が摂取することにより、これら害虫を防除又は駆除できる。このとき樹木に開けられる注入穴数は、樹木の胸高直径を基準にして決定される樹木１本当りの注入量及び注入穴１つ当りの注入量に応じて適宜に設定され、例えば、胸高直径２０〜５０ｃｍの樹木１本当りの注入穴数は５〜１６個とされる。注入穴は、通常、処理する樹木の葉（加害部位）よりも下方に、例えば、根元又は地表から１０〜５０ｃｍまでの高さに穿孔され、その直径、深さ及び穿孔角度についてはこの発明に係る殺虫剤組成物を注入できる程度に適宜に設定され、例えば、直径は２〜１０ｍｍ、深さは１〜１０ｃｍ、穿孔角度は水平面に対して３０〜６０°に設定される。 The insecticidal method according to the present invention may be any administration method, spraying method, or injecting method capable of administering, spraying, or injecting the insecticide composition according to the present invention to a tree. As a preferable processing method, that is, a method of using the insecticide composition according to the present invention, an injection hole (hereinafter sometimes referred to as an injection hole) drilled in a tree using a drill or the like, or a pest is present. There is a method of injecting the insecticide composition according to the present invention into a perforation opened in a tree, that is, into a tree body. As described above, when the insecticide composition according to the present invention is injected into the injection hole or perforation, the insecticide component diffuses throughout the tree, and the insecticide comes into contact with the insecticide component or the insecticide ingests the insecticide component. Can be controlled or exterminated. At this time, the number of injection holes opened in the tree is appropriately set according to the injection amount per tree and the injection amount per injection hole determined based on the breast height diameter of the tree. The number of injection holes per 20-50 cm tree is 5-16. The injection hole is usually drilled below the leaf (harmful site) of the tree to be treated, for example, at a height of 10 to 50 cm from the root or the ground surface, and the diameter, depth and drilling angle are related to the present invention. For example, the diameter is set to 2 to 10 mm, the depth is set to 1 to 10 cm, and the drilling angle is set to 30 to 60 ° with respect to the horizontal plane.
いずれの形態により、また、どのような施用態様であれ、この発明に係る殺虫剤組成物は、樹木の胸高直径を基準にして投与量すなわち注入量が決定され、例えば、胸高直径が２０〜５０ｃｍの樹木の場合には、この発明に係る殺虫剤組成物中の殺虫成分が投与対象又は注入対象となる樹木１本当り２〜５０００ｍｇとなるように、投与されるのが好ましい。この場合は、注入穴数は５〜１６個に設定されるので、注入穴１個当りの注入量は０．５〜１２５０ｍｇとなり、２０〜４０００ｍｇとするのが好ましい。このとき１注入穴当りの投与量は極めて少量の０．１〜５．０ｍＬとなる。 In any form and in any application mode, the dose of the insecticide composition according to the present invention is determined on the basis of the breast height diameter of a tree, for example, the breast height diameter is 20 to 50 cm. In the case of this tree, it is preferable that the insecticidal component in the insecticidal composition according to the present invention is administered so as to be 2 to 5000 mg per tree to be administered or injected. In this case, since the number of injection holes is set to 5 to 16, the injection amount per injection hole is 0.5 to 1250 mg, preferably 20 to 4000 mg. At this time, the dose per injection hole is 0.1 to 5.0 mL, which is a very small amount.
この発明に係る殺虫剤組成物を適用することにより害虫を防除又は駆除できる樹木としては、山林樹、公園、学校又は市街地等に植栽されている樹木又は街路樹などが挙げられ、具体的には、例えば、マツ、スギ、ヒノキなどの山林樹、サザンカ、ツバキ、サクラ、ケヤキ、プラタナス、ヤシ、デイゴ、カエデ、カシ類、モクセイなどの樹木又は街路樹を挙げることができる。 Examples of trees that can control or exterminate pests by applying the insecticide composition according to the present invention include mountain forest trees, parks, schools, trees or street trees planted in urban areas, etc. Examples thereof include forests such as pine, cedar and cypress, trees such as sasanqua, camellia, cherry, zelkova, plane tree, palm, deigo, maple, oak, and oxeye, and roadside trees.
この発明に係る殺虫剤組成物を適用することにより防除又は駆除できる害虫としては、山林樹及び樹木又は街路樹などに寄生する害虫であれば特に限定されず、例えば、コガネムシ類、ケムシ類、ミノムシ類などの食害性害虫、アブラムシ類、カイガラムシ類、ロウムシ類、ダニ類などの吸汁性害虫、カミキリムシ類、キクイムシ類、ゾウムシ類などの穿孔性害虫、チャドクガ、アメリカシロヒトリ、マツカレハなどの食葉性害虫などの害虫を挙げることができる。 The pest that can be controlled or controlled by applying the insecticide composition according to the present invention is not particularly limited as long as it is a pest parasitic on mountain forest trees and trees or roadside trees. Pests such as aphids, sucking pests such as aphids, scale insects, rotifers, mites, perforated pests such as longhorn beetles, bark beetles, weeviles, and foliar pests such as chadokuga, white-spotted starfish, and pine moths And pests.
このように、この発明に係る殺虫剤組成物は、殺虫成分と低級アルコールとシリコーン系界面活性剤とを所定の質量割合で含有しているから、山林樹及び樹木又は街路樹などに寄生する害虫をこれらの樹木に大きな負荷をかけることなく効果的に防除又は駆除できる。また、この発明に係る殺虫剤組成物は、樹木への高い吸収性を有しているものの、殺虫成分を高濃度で含有しているから樹木１本当りの注入量を大幅に低減でき、その結果、注入時間を大幅に短縮できると共に例えば「ノズルつき透明プラスチックアンプル」などの注入装置を後日回収する必要もなくその場で注入作業が完了し、高い注入作業を実現できる。 As described above, since the insecticide composition according to the present invention contains the insecticide component, the lower alcohol, and the silicone-based surfactant in a predetermined mass ratio, the insect pests parasitic on mountain forest trees, trees, roadside trees, and the like. Can be effectively controlled or extinguished without imposing a heavy load on these trees. Moreover, although the insecticide composition according to the present invention has high absorbability to trees, it contains a high concentration of insecticide components, so that the amount injected per tree can be greatly reduced. As a result, the injection time can be greatly shortened and, for example, the injection operation such as “transparent plastic ampule with nozzle” need not be collected at a later date, so that the injection operation is completed on the spot and a high injection operation can be realized.
（試験例１）
殺虫剤組成物に含有される溶剤が殺虫剤組成物の浸透性に与える影響を調べた。具体的には、加害樹種ツバキの生木樹幹部（地表から１５〜３０ｃｍの高さ）に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴に、第１表に示す殺虫剤組成物Ｎｏ．１〜１３をマイクロピペッターにて１．０ｍＬ注入し、殺虫剤組成物１．０ｍＬ全量がツバキの生木に完全に浸透するまでの浸透時間を測定した。その結果を第１表に示す。なお、ジノテフラン液剤は三井化学アグロ株式会社の市販品であり、１０質量％のジノテフランを含有する液剤である。殺虫剤組成物Ｎｏ．１におけるジノテフラン含有率は１０００００ｐｐｍで殺虫剤組成物Ｎｏ．２〜１３におけるジノテフラン含有率は８００００ｐｐｍであった。
(Test Example 1)
The effect of the solvent contained in the insecticide composition on the permeability of the insecticide composition was examined. More specifically, Table 1 shows an injection hole with a diameter of 8 mm, a depth of 5 cm, and an angle of 45 ° opened by a woodworking drill on a tree trunk of a damaged tree species camellia (15-30 cm high from the ground surface). Insecticide composition no. 1 to 13 were injected with a micropipettor, and the penetration time until the total amount of the pesticide composition 1.0 mL completely penetrated into the camellia trees was measured. The results are shown in Table 1. In addition, a dinotefuran liquid agent is a commercial item of Mitsui Chemicals Agro Co., Ltd., and is a liquid agent containing 10% by mass of dinotefuran. Insecticide composition no. The dinotefuran content in No. 1 was 100,000 ppm and the insecticide composition No. 1 was used. The dinotefuran content in 2 to 13 was 80000 ppm.
第１表に示されるように、メチルアルコール、エチルアルコール及びｉｓｏ−プロピルアルコールの低級アルコールを溶剤として含有する殺虫剤組成物Ｎｏ．４〜６は３０ｍｉｎ以下という短時間で速やかにツバキの生木樹幹部に浸透することが分かった。これに対して、ジノテフラン液剤単独の殺虫剤組成物Ｎｏ．１、蒸留水を含む殺虫剤組成物Ｎｏ．２、蒸留水及びポリオキシエチレンアルキルエーテルを含む殺虫剤組成物Ｎｏ．３及び低級アルコール以外の溶剤を含む殺虫剤組成物Ｎｏ．７〜１３は浸透に早くても２５ｍｉｎ、通常６０ｍｉｎを超える時間を要した。 As shown in Table 1, an insecticide composition No. containing methyl alcohol, ethyl alcohol, and a lower alcohol of iso-propyl alcohol as a solvent. It turned out that 4-6 penetrate | invade quickly into a camellia tree trunk in a short time of 30 minutes or less. In contrast to this, dinotefuran liquid single insecticide composition No. 1. Insecticide composition No. 1 containing distilled water 2, insecticide composition No. containing distilled water and polyoxyethylene alkyl ether 3 and a pesticide composition No. containing a solvent other than lower alcohol. 7 to 13 required a time exceeding 25 min, usually 60 min, at the earliest.
（試験例２）
サクラ（ソメイヨシノ、樹齢３年）の生木樹幹部の地表から５０ｃｍの地点に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴４個それぞれに、１注入穴当りのジノテフラン注入量が８０ｍｇとなるように、第１表に示す殺虫剤組成物Ｎｏ．１〜１３をマイクロピペッターで１．０ｍＬ注入した。このようにして各殺虫剤組成物を注入したサクラ生木の薬害の有無を注入後１ヶ月、２ヶ月及び３ヶ月の時点で目視にて評価した。これらの結果を第２表に示す。
(Test Example 2)
Dinote franc per injection hole in each of four injection holes 8mm in diameter, 5cm in depth and 45 ° angle drilled with a woodworking drill at a point 50cm from the surface of a tree trunk of a cherry tree (Yoshino cherry tree, 3 years old) Insecticide composition No. shown in Table 1 so that the injection amount is 80 mg. 1 to 13 was injected with 1.0 mL of micropipette. Thus, the presence or absence of the phytotoxicity of the cherry tree which inject | poured each insecticide composition was evaluated visually at the time of 1 month, 2 months, and 3 months after injection | pouring. These results are shown in Table 2.
第２表に示されるように、低級アルコールを溶剤として含有する殺虫剤組成物Ｎｏ．４〜６はいずれの時点においても薬害が発生しやすいとされるサクラ生木に薬害が確認されなかったのに対して、低級アルコール以外の溶剤を含有する殺虫剤組成物Ｎｏ．７〜１３の一部、特に浸透が比較的速やかであったシクロヘキサノンを含有する殺虫剤組成物Ｎｏ．９はサクラ生木に薬害が確認された。 As shown in Table 2, insecticide composition No. 1 containing a lower alcohol as a solvent. In Nos. 4 to 6, insecticide composition No. 4 containing a solvent other than the lower alcohol was used, whereas no phytotoxicity was observed in the raw cherry tree, which is considered to cause phytotoxicity at any time. Insecticide composition Nos. 7 to 13 containing cyclohexanone, which permeated relatively quickly. No. 9 was confirmed to be phytotoxic to the cherry trees.
（試験例３）
殺虫剤組成物に含有される界面活性剤が殺虫剤組成物の浸透性に与える影響を調べた。具体的には、加害樹種ツバキの生木樹幹部（地表から１５〜３０ｃｍの高さ）に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴に、第３表に示す殺虫剤組成物Ｎｏ．２１〜３０をマイクロピペッターにて１．０ｍＬ注入し、殺虫剤組成物１．０ｍＬ全量がツバキの生木に完全に浸透するまでの浸透時間を測定した。その結果を第３表に示す。なお、ジノテフラン液剤は三井化学アグロ株式会社の市販品であり、殺虫剤組成物それぞれにおけるジノテフラン含有率は８００００ｐｐｍであった。
(Test Example 3)
The effect of the surfactant contained in the insecticide composition on the permeability of the insecticide composition was examined. Specifically, Table 3 shows an injection hole with a diameter of 8 mm, a depth of 5 cm, and an angle of 45 ° opened by a woodworking drill on a tree trunk of a damaged tree species camellia (height 15-30 cm from the surface). Insecticide composition no. 21 to 30 were injected with a micropipette, and the penetration time until the total amount of the pesticide composition 1.0 mL completely penetrated into the camellia tree was measured. The results are shown in Table 3. In addition, the dinotefuran liquid agent is a commercial item of Mitsui Chemicals Agro Co., Ltd., and the dinotefuran content rate in each insecticide composition was 80000 ppm.
なお、第３表において、ポリエーテル変性シリコーンオイル＊１は商品名「ＫＦ−６４０」（ＨＬＢ １４、信越化学工業株式会社製）であり、ポリエーテル変性シリコーンオイル＊２は商品名「Ｘ−２２−４５１５」（ＨＬＢ ５、信越化学工業株式会社製）であり、モノアミン変性シリコーンオイル＊３は商品名「ＫＦ−８６８」（信越化学工業株式会社製）である。 In Table 3, polyether-modified silicone oil * 1 is a trade name “KF-640” (HLB 14, manufactured by Shin-Etsu Chemical Co., Ltd.), and polyether-modified silicone oil * 2 is a trade name “X-22”. -4515 "(HLB 5, manufactured by Shin-Etsu Chemical Co., Ltd.), and monoamine-modified silicone oil * 3 is a trade name" KF-868 "(manufactured by Shin-Etsu Chemical Co., Ltd.).
第３表に示されるように、界面活性剤を含有しない殺虫剤組成物Ｎｏ．２１及び２２、並びに、農薬等に一般的に使用される界面活性剤を含有する殺虫剤組成物Ｎｏ．２３〜２７は浸透に早くても２０分以上、大部分は３０分以上を要した。これに対して、シリコーン系界面活性剤を含有する薬剤組成物２８〜３０は浸透に１０分以下の短時間で、特にＨＬＢが１４又は５のポリエーテル変性シリコーンオイルを含有する殺虫剤組成物Ｎｏ．２８及び２９は浸透に１０秒又は５分という極めて短時間で速やかにツバキの生木樹幹部に浸透することが分かった。 As shown in Table 3, an insecticide composition No. containing no surfactant was used. 21 and 22, and an insecticide composition No. containing a surfactant generally used for agricultural chemicals and the like. 23 to 27 required 20 minutes or more at the earliest to penetrate, and most took 30 minutes or more. On the other hand, the pharmaceutical compositions 28 to 30 containing a silicone-based surfactant have an insecticidal composition No. containing a polyether-modified silicone oil having a HLB of 14 or 5 in a short time of 10 minutes or less for penetration. . It was found that 28 and 29 penetrated into the stems of camellia trees in a very short time of 10 seconds or 5 minutes.
（試験例４）
殺虫剤組成物に含有されるシリコーン系界面活性剤の含有率が殺虫剤組成物の浸透性に与える影響を調べた。加害樹種ツバキの生木樹幹部（地表から１５〜３０ｃｍの高さ）に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴に、第４表に示す殺虫剤組成物Ｎｏ．４１〜４６をマイクロピペッターにて１．０ｍＬ注入し、殺虫剤組成物１．０ｍＬ全量がツバキの生木に完全に浸透するまでの浸透時間を測定した。その結果を第４表に示す。なお、ジノテフラン液剤は三井化学アグロ株式会社の市販品であり、殺虫剤組成物それぞれにおけるジノテフラン含有率は８００００ｐｐｍであった、また、試験例４においては、ジノテフラン濃度（殺虫剤組成物中の含有率）を８００００ｐｐｍに一定にするため、その他の成分として蒸留水を必要に応じて第４表に示す含有率で含有させた。
(Test Example 4)
The effect of the content of the silicone surfactant contained in the insecticide composition on the permeability of the insecticide composition was examined. Insecticide composition No. shown in Table 4 in the injection hole of diameter 8mm, depth 5cm, angle 45 ° drilled on the tree trunk (15-30cm height from the ground surface) of the damaged tree species camellia with a woodworking drill . 41-46 was injected with 1.0 mL with a micropipette, and the penetration time until the total amount of 1.0 mL of the insecticide composition completely penetrated into the camellia tree was measured. The results are shown in Table 4. The dinotefuran solution is a commercial product of Mitsui Chemicals Agro Co., Ltd., and the dinotefuran content in each of the insecticide compositions was 80000 ppm. In Test Example 4, the dinotefuran concentration (the content in the insecticide composition) ) Was made constant at 80,000 ppm, distilled water was added as other components at a content shown in Table 4 as necessary.
第４表に示されるように、シリコーン系界面活性剤を０．１〜１０質量％含有する殺虫剤組成物Ｎｏ．４１〜４６はいずれも浸透に１分以下という短時間で速やかにツバキの生木に浸透することが分かった。また、殺虫剤組成物中のシリコーン系界面活性剤の含有率が多くなると浸透時間が短縮される反面、その浸透促進効果が鈍くなることも分かった。 As shown in Table 4, an insecticide composition No. containing 0.1 to 10% by mass of a silicone surfactant. It was found that all of Nos. 41 to 46 penetrated into camellia trees quickly in a short time of 1 minute or less. It was also found that when the content of the silicone-based surfactant in the insecticide composition increases, the penetration time is shortened, but the penetration promotion effect becomes dull.
（試験例５）
殺虫剤組成物に含有される殺虫成分を種々の成分に代えて殺虫剤組成物の浸透性を調べた。具体的には、加害樹種ツバキの生木樹幹部（地表から１５〜３０ｃｍの高さ）に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴に、第５表に示す殺虫剤組成物Ｎｏ．５１〜５７をマイクロピペッターにて１．０ｍＬ注入し、殺虫剤組成物１．０ｍＬ全量がツバキの生木に完全に浸透するまでの浸透時間を測定した。その結果を第５表に示す。なお、試験例５においては、殺虫剤組成物Ｎｏ．５７を除いて、殺虫成分の成分濃度（殺虫剤組成物中の含有率）を８００００ｐｐｍに一定にするため、各液剤にその他の成分として蒸留水を第５表に示す含有率で添加した。第５表において、ポリエーテル変性シリコーンオイル＊１は商品名「ＫＦ−６４０」（ＨＬＢ １４、信越化学工業株式会社製）であり、ジノテフラン液剤は三井化学アグロ株式会社の市販品を、アセタミプリド液剤は日本曹達株式会社の市販品を、アセフェート液剤は住友化学園芸株式会社の市販品を、チアメトキサム液剤は井筒屋化学株式会社の市販品をそれぞれ用いた。このチアメトキサム液剤はチアメトキサムを４．０％（４００００ｐｐｍ）含有する特許文献２の樹幹注入用組成物に相当する薬剤である。
(Test Example 5)
The penetrability of the insecticide composition was examined by replacing the various insecticide components contained in the insecticide composition. Specifically, Table 5 shows an injection hole with a diameter of 8 mm, a depth of 5 cm, and an angle of 45 ° opened by a woodworking drill in a tree trunk of a damaged tree species camellia (15-30 cm high from the surface). Insecticide composition no. 51 to 57 was injected with 1.0 mL with a micropipette, and the penetration time until the total amount of 1.0 mL of the insecticide composition completely penetrated into the camellia tree was measured. The results are shown in Table 5. In Test Example 5, the insecticide composition No. In order to make the component concentration of the insecticidal component (content ratio in the insecticide composition) constant at 80000 ppm except 57, distilled water was added to each liquid agent at the content ratio shown in Table 5. In Table 5, polyether-modified silicone oil * 1 is a trade name “KF-640” (HLB 14, manufactured by Shin-Etsu Chemical Co., Ltd.), dinotefuran liquid is a commercial product of Mitsui Chemicals Agro Co., Ltd., and acetamiprid liquid is A commercial product of Nippon Soda Co., Ltd. was used, a commercial product of Sumitomo Chemical Horticulture Co., Ltd. was used as the acephate solution, and a commercial product of Izutsuya Chemical Co., Ltd. was used as the thiamethoxam solution. This thiamethoxam solution is a drug corresponding to the trunk injection composition of Patent Document 2 containing 4.0% (40000 ppm) thiamethoxam.
第５表に示されるように、殺虫成分としてジノテフラン（ジノテフラン乳剤）、アセタミプリド（アセタミプリド液剤）及びアセフェート（アセフェート液剤）のいずれを用いても低級アルコール及びシリコーン系界面活性剤を含有する殺虫剤組成物Ｎｏ．５１、５３及び５５は、低級アルコール及びシリコーン系界面活性剤を含有しない殺虫剤組成物Ｎｏ．５２、５４、５６及び５７に比して浸透時間が大幅に短縮され、浸透時間が１分以内という極めて短時間で浸透することが分かった。 As shown in Table 5, an insecticide composition containing a lower alcohol and a silicone-based surfactant, regardless of whether dinotefuran (dinotefuran emulsion), acetamiprid (acetamipride solution) or acephate (acephate solution) is used as an insecticidal component. No. Nos. 51, 53 and 55 are insecticidal composition Nos. Containing no lower alcohol and silicone surfactant. It was found that the permeation time was significantly shortened compared to 52, 54, 56 and 57, and the infiltration time penetrated in an extremely short time of 1 minute or less.
（試験例６）
サクラ（ソメイヨシノ、樹齢１０年）の生木樹幹部の地表から０．５ｍの地点に木工用ドリルで開けた直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴３個それぞれにチアメトキサム液剤（井筒屋化学株式会社製）又は第５表における殺虫剤組成物Ｎｏ．５１を注入した。チアメトキサム液剤（チアメトキサム含有率４００００ｐｐｍ）はその使用液量（農林水産省登録第２２０５０号）に従って１注入穴当りのチアメトキサム注入量が２４００ｍｇとなるように、各注入穴に６０ｍＬを専用ボトルで自然圧によって注入した。殺虫剤組成物Ｎｏ．５１（ジノテフラン含有率８００００ｐｐｍ）は１注入穴当りのジノテフラン注入量が８０ｍｇとなるように、各注入穴にマイクロピペッターで１．０ｍＬ注入した。これらの殺虫剤組成物の全量がサクラの生木に完全に浸透するまでの浸透時間を各注入穴について測定し、その平均浸透時間を求めた。また、各殺虫剤組成物が注入穴に完全に浸透するか否かの注入成功率を求めた。さらに、このようにして各殺虫剤組成物を注入したサクラ生木の薬害の有無を注入後１ヶ月及び３ヶ月の時点で生木の葉（第６表において「葉」と表記する）及び注入穴について目視で評価した。この評価は、チアメトキサム液剤を注入するサクラの生木１本において３回反復試験し、また殺虫剤組成物Ｎｏ．５１を注入するサクラの生木１本において３回反復試験した。これらの結果を第６表に示す。
(Test Example 6)
Thiametoxam solution (Izutsuya Chemical Co., Ltd.) for each of 3 injection holes 8mm in diameter, 5cm deep and 45 ° angle drilled with a woodworking drill at a point 0.5m from the surface of a tree trunk of a cherry tree (Yoshino cherry tree, 10 years old) Co., Ltd.) or the insecticide composition No. in Table 5. 51 was injected. Thiamethoxam solution (thiamethoxam content 40000ppm) is 60ml in each injection hole by natural pressure so that the injection amount of thiamethoxam per injection hole is 2400mg according to the amount of liquid used (Ministry of Agriculture, Forestry and Fisheries Registration No. 22050) Injected. Insecticide composition no. 51 (dinotefuran content 80000 ppm) was injected into each injection hole by 1.0 mL with a micropipette so that the injection amount of dinotefuran per injection hole was 80 mg. The penetration time until the total amount of these insecticide compositions completely penetrated into the cherry tree was measured for each injection hole, and the average penetration time was determined. Moreover, the injection | pouring success rate of whether each insecticide composition completely osmose | permeates an injection hole was calculated | required. Furthermore, regarding the presence or absence of the phytotoxicity of the raw cherry trees injected with the respective insecticide compositions in this way, about the leaves of the raw trees (denoted as “leaves” in Table 6) and injection holes at 1 month and 3 months after injection. Visually evaluated. This evaluation was repeated three times on a single cherry tree to which thiamethoxam solution was injected, and the insecticide composition no. The test was repeated three times on a single cherry tree injected with 51. These results are shown in Table 6.
第６表に示されるように、殺虫剤組成物Ｎｏ．５１は注入量が１．０ｍＬと極めて少量で２３秒というきわめて短時間で即座にサクラ生木に浸透し、注入成功率が１００％でサクラの葉及び注入穴のいずれの時点においても薬害が確認されなかった。これに対して、チアメトキサム液剤は注入量が６０ｍＬと多く平均で１０分の浸透時間を要し、注入後３ヶ月の時点でサクラの葉に薬害が確認された。 As shown in Table 6, the insecticide composition no. No. 51 has a very small injection volume of 1.0 mL, and it penetrates the cherry tree immediately in a very short time of 23 seconds. The injection success rate is 100%, and the phytotoxicity is confirmed at any point of the cherry leaf and the injection hole. Was not. In contrast, the thiamethoxam solution had a large injection volume of 60 mL and required an average of 10 minutes of penetration time, and phytotoxicity was confirmed on the cherry leaves at 3 months after injection.
（試験例７）
サクラ（ソメイヨシノ、樹齢１０年）に代えてツバキ（ヤブツバキ、樹齢１０年）を処理対象木としたこと以外は基本的に試験例６と同様にして、ツバキに対する浸透時間、注入成功率及び薬害を評価した。
(Test Example 7)
Basically, in the same manner as in Test Example 6 except that camellia (Yabetsu camellia, 10 years old) were used as treatment target trees instead of cherry (Yoshino Yoshino, 10 years old), the permeation time, success rate of injection and phytotoxicity for camellia were measured. evaluated.
第７表に示されるように、チアメトキサム液剤は注入量が６０ｍＬと多く平均で６分の浸透時間を要したのに対して、殺虫剤組成物Ｎｏ．５１は注入量が１．０ｍＬと極めて少量で１２秒というきわめて短時間で即座にツバキ生木に浸透し、注入成功率が１００％でツバキの葉及び注入穴のいずれの時点においても薬害が確認されなかった。 As shown in Table 7, the thiamethoxam solution had a large injection volume of 60 mL and took an average of 6 minutes of penetration time. No. 51 has a very small injection volume of 1.0 mL and quickly penetrates the camellia tree in a very short time of 12 seconds. The injection success rate is 100%, and the phytotoxicity is confirmed at any point of the camellia leaf and injection hole. Was not.
（試験例８）
サクラ（ソメイヨシノ、樹齢１０年）に代えてカエデ（イロハモミジ、樹齢２０年）を処理対象木としたこと以外は基本的に試験例６と同様にして、カエデに対する浸透時間、注入成功率及び薬害を評価した。
(Test Example 8)
Basically, in the same manner as in Test Example 6 except that maple (Acer palmatum, 20 years old) was used as the treatment target tree instead of the cherry (Yoshino Yoshino, 10 years old), the penetration time, injection success rate and phytotoxicity for the maple were determined. evaluated.
第８表に示されるように、チアメトキサム液剤は注入量が６０ｍＬと多く平均で１０分の浸透時間を要したのに対して、殺虫剤組成物Ｎｏ．５１は注入量が１．０ｍＬと極めて少量で１３秒というきわめて短時間で即座にカエデ生木に浸透し、注入成功率が１００％でカエデの葉及び注入穴のいずれの時点においても薬害が確認されなかった。 As shown in Table 8, the thiamethoxam solution had a large injection volume of 60 mL and required an average of 10 minutes of penetration time. 51 is a very small injection amount of 1.0 mL, and it penetrates the maple tree quickly in a very short time of 13 seconds. The injection success rate is 100%, and phytotoxicity is confirmed at any point of the maple leaf and injection hole. Was not.
（試験例９）
胸高直径を測定したツバキ生木を９本選定して、これらを、第５表における殺虫剤組成物Ｎｏ．５２（ジノテフラン液剤と蒸留水とを含有する組成物）を注入する第１グループ、第５表における殺虫剤組成物Ｎｏ．５１を注入する第２グループ及び無処理の第３グループに３本ずつ３グループに群分けした。第１グループ及び第２グループのツバキ生木６本それぞれの生木樹幹部の地表から０．５ｍ地点に直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴３個を木工用ドリルで開けた。第１グループの各ツバキ生木の注入穴それぞれに１注入穴当りのジノテフラン注入量が８０ｍｇとなるように１．０ｍＬの殺虫剤組成物Ｎｏ．５２をマイクロピペッターで注入した。また、第２グループの各ツバキ生木の注入穴それぞれに１注入穴当りのジノテフラン注入量が８０ｍｇとなるように１．０ｍＬの殺虫剤組成物Ｎｏ．５１をマイクロピペッターで注入した。
(Test Example 9)
Nine camellia trees whose breast height diameters were measured were selected, and these were selected as the insecticide composition No. 5 in Table 5. No. 52 (composition containing dinotefuran solution and distilled water), the first group, pesticide composition No. 5 in Table 5. Three groups were divided into 3 groups, 3 groups into the second group to which 51 was injected and the third group without treatment. Three injection holes having a diameter of 8 mm, a depth of 5 cm, and an angle of 45 ° were drilled with a woodworking drill at a point of 0.5 m from the ground surface of each of the six tree camellia trees of the first group and the second group. 1.0 mL of the insecticide composition No. 1 so that the injection amount of dinotefuran per injection hole is 80 mg in each injection hole of each camellia tree of the first group. 52 was injected with a micropipette. Further, 1.0 mL of the insecticide composition No. 1 was added so that the injection amount of dinotefuran per injection hole was 80 mg in each injection hole of each camellia tree of the second group. 51 was injected with a micropipette.
殺虫剤組成物Ｎｏ．５２及び殺虫剤組成物Ｎｏ．５１の全量がツバキ生木に完全に浸透するまでの浸透時間（平均値）を各ツバキ生木について算出した。また、殺虫剤組成物Ｎｏ．５２及び殺虫剤組成物Ｎｏ．５１が注入穴に完全に浸透するか否かの注入成功率を求めた。さらに、殺虫剤組成物Ｎｏ．５２及び殺虫剤組成物Ｎｏ．５１を注入した１５日後及び３０日後にツバキ生木の主幹部及び副幹部におけるチャドクガに対する防除効果又は駆除効果を確認した。チャドクガに対する防除効果又は駆除効果は、具体的には、ツバキ葉に寄生しているチャドクガ幼虫の殺虫率（％）で評価した。さらに、殺虫剤組成物Ｎｏ．５２及び殺虫剤組成物Ｎｏ．５１を注入した１ヵ月後及び３ヶ月後の時点でツバキ生木の薬害の有無を生木全体（第９表において「樹全体」と表記する）及び注入穴について目視で評価した。これらの結果を第９表に示す。 Insecticide composition no. 52 and insecticide composition no. The permeation time (average value) until the total amount of 51 completely penetrated into the camellia tree was calculated for each camellia tree. Also, the insecticide composition No. 52 and insecticide composition no. The injection success rate was determined as to whether 51 penetrates completely into the injection hole. Furthermore, the insecticide composition No. 52 and insecticide composition no. 15 days and 30 days after the injection of 51, the control effect or extermination effect on Chadokuga in the main trunk and sub trunk of the camellia tree was confirmed. Specifically, the control effect or extermination effect on Chadokuga was evaluated by the insecticidal rate (%) of Chadokuga larvae parasitic on camellia leaves. Furthermore, the insecticide composition No. 52 and insecticide composition no. At 1 month and 3 months after injection of 51, the presence or absence of phytotoxicity of the camellia tree was visually evaluated for the whole tree (indicated as “whole tree” in Table 9) and the injection hole. These results are shown in Table 9.
第９表に示されるように、殺虫剤組成物Ｎｏ．５２は注入量が１．０ｍＬであったにもかかわらず５０〜７３分もの浸透時間（平均値）を要したのに対して、殺虫剤組成物Ｎｏ．５１は１０秒以下というきわめて短時間で即座にツバキ生木に浸透した。また、殺虫剤組成物Ｎｏ．５１は注入成功率が１００％で殺虫剤組成物Ｎｏ．５２と同等の注入成功率を発揮することが分かった。さらに、殺虫剤組成物Ｎｏ．５２を注入した第１グループのツバキ生木におけるチャドクガに対する防除効果又は駆除効果は３０日を経過しても安定せず遅効性が確認されたのに対して、殺虫剤組成物Ｎｏ．５１を注入した第２グループのツバキ生木におけるチャドクガに対する防除効果又は駆除効果は１５日後でも安定した即効性が確認された。また、殺虫剤組成物Ｎｏ．５２及び殺虫剤組成物Ｎｏ．５１の注入１ヵ月後及び３ヶ月後の時点でツバキの生木全体及び注入穴のいずれの時点においても薬害が確認されなかった。 As shown in Table 9, the insecticide composition No. No. 52 required an infiltration time (average value) of 50 to 73 minutes even though the injection amount was 1.0 mL. 51 immediately penetrated camellia trees in a very short time of 10 seconds or less. Also, the insecticide composition No. No. 51 has an injection success rate of 100% and has an insecticide composition No. It was found that the injection success rate equivalent to 52 was exhibited. Furthermore, the insecticide composition No. On the other hand, the control effect or control effect on Chadokuga in the first group of camellia trees injected with No. 52 was not stable even after 30 days. As for the control effect or the extermination effect on Chadokuga in the second group of camellia trees injected with 51, a stable immediate effect was confirmed even after 15 days. Also, the insecticide composition No. 52 and insecticide composition no. No phytotoxicity was observed at any time of the whole camellia tree or injection hole at 51 and 1 month after injection.
（試験例１０）
胸高直径を測定したツバキ生木を２本選定して、これらを、第５表における殺虫剤組成物Ｎｏ．５２（ジノテフラン液剤と蒸留水とを含有する組成物）を注入する第１グループ、及び、第５表における殺虫剤組成物Ｎｏ．５１を注入する第２グループに群分けした。第１グループ及び第２グループのツバキ生木２本それぞれの生木樹幹部の地表から０．５ｍ地点に直径８ｍｍ、深さ５ｃｍ、角度４５°の注入穴４個を木工用ドリルで開けた。第１グループのツバキ生木の注入穴それぞれに１注入穴当りのジノテフラン注入量が８０ｍｇとなるように１．０ｍＬの殺虫剤組成物Ｎｏ．５２をマイクロピペッターで注入した。また、第２グループのツバキ生木の注入穴それぞれに１注入穴当りのジノテフラン注入量が８０ｍｇとなるように１．０ｍＬの殺虫剤組成物Ｎｏ．５１をマイクロピペッターで注入した。
(Test Example 10)
Two camellia trees whose breast height diameter was measured were selected, and these were selected as the insecticide composition No. 5 in Table 5. No. 52 (composition containing dinotefuran solution and distilled water), and the insecticide composition No. 1 in Table 5. Grouped into a second group injecting 51. Four injection holes having a diameter of 8 mm, a depth of 5 cm, and an angle of 45 ° were drilled with a woodworking drill at a point of 0.5 m from the surface of the trunk of each of the first group and the second group of camellia trees. 1.0 mL of pesticide composition No. 1 was added so that the injection amount of dinotefuran per injection hole was 80 mg in each injection hole of the first group of camellia trees. 52 was injected with a micropipette. In addition, 1.0 mL of the insecticide composition No. 1 was added so that the injection amount of dinotefuran per injection hole would be 80 mg in each injection hole of the second group of camellia trees. 51 was injected with a micropipette.
第１グループ及び第２グループのツバキ生木のジノテフランの樹体内濃度を地表から直上に１．０ｍ及び２．０ｍの地点でドリルにて木片（主幹部及び副幹部）を採取し、高速液体クロマトグラフィーにて測定した。具体的には、ツバキ生木において、地上高１．０ｍ及び２．０ｍの地点における主幹部及び副幹部を分析部位として殺虫剤組成物Ｎｏ．５２又は殺虫剤組成物Ｎｏ．５１の注入１５日後及び注入３０日後に各分析部位におけるジノテフランの樹体内濃度を測定した。その結果を第１０表に示す。 Tree pieces (main trunk and sub-trunks) were collected by drilling at a point of 1.0m and 2.0m above the surface of the dinotefuran in the first group and the second group of camellia trees. Measured by chromatography. Specifically, in the camellia tree, the insecticide composition No. 1 was analyzed using the main trunk and the sub trunk at the points of 1.0 m and 2.0 m above the ground. 52 or pesticide composition no. The concentration of dinotefuran in the tree at each analysis site was measured 15 days after injection and 51 days after injection. The results are shown in Table 10.
第１０表に示されるように、殺虫剤組成物Ｎｏ．５１を注入したツバキ生木においては、いずれの分析部位においても、またいずれの時点においてもジノテフランの樹体内濃度が殺虫剤組成物Ｎｏ．５２を注入したツバキ生木のジノテフランの樹体内濃度よりも高くなっており、殺虫剤組成物Ｎｏ．５１は殺虫剤組成物Ｎｏ．５２よりも殺虫成分であるジノテフランが高い樹体内移行性を示し、ツバキ生木に広範に移行することが分かった。 As shown in Table 10, the insecticide composition no. In the camellia tree injected with 51, the concentration of dinotefuran in the tree at any site of analysis and at any point in time was determined with the insecticide composition No. It is higher than the concentration of dinotefuran in the camellia tree injected with No. 52, and the insecticide composition no. No. 51 is an insecticide composition No. It was found that dinotefuran, which is an insecticidal component, was higher than 52 in the tree, and migrated extensively to camellia trees.
この発明に係る殺虫剤組成物及び殺虫方法は、高濃度の殺虫成分を迅速に直接投与すなわち注入できるので、樹体に速やかに浸透して樹木に大きな負荷をかけることなく害虫を効果的に防除又は駆除できる。この発明に係る殺虫剤組成物及び殺虫方法は、特に、公園、学校又は市街地等に植栽されている樹木又は街路樹に寄生する害虫を、周辺住民、通行人等に対する薬害等を懸念することなく、防除又は駆除できる。 The insecticide composition and insecticide method according to the present invention can directly administer, that is, inject, a high concentration of an insecticide component, so that it can quickly penetrate the tree and effectively control pests without imposing a heavy load on the tree. Or it can be disinfected. The insecticide composition and the insecticidal method according to the present invention are particularly concerned about phytotoxicity to local residents, passersby, etc. with respect to pests parasitic on trees or street trees planted in parks, schools or urban areas, etc. Without control or extermination.
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