JPH0452244B2

JPH0452244B2 -

Info

Publication number: JPH0452244B2
Application number: JP58111044A
Authority: JP
Inventors: Minaaki Seki
Original assignee: SDS Biotech Corp
Current assignee: SDS Biotech Corp
Priority date: 1983-06-22
Filing date: 1983-06-22
Publication date: 1992-08-21
Also published as: JPS604109A

Description

[Detailed description of the invention]

本発明は、３−（３，３−ジメチルウレイド）
フエニルターシヤリ−ブチルカーバメート（以下
DUPCと略する）と２，２，３，３−テトラフル
オロプロピオン酸（以下テトラピオンと略称す
る）とを有効成分として特定な割合で含有する除
草剤組成物を林地および非農耕地において処理す
る林地および非農耕地の雑草および雑灌木の防除
方法に関するものである。林業地においては人工造林、天然更新林地を問
わず、スギ、ヒノキ及びマツ等の有用樹種の幼樹
期における、有害植物の除去あるいは、生育抑制
が重要となつている。一般に林地において問題となる有害植物として
は一年生雑草、ササ類、クズ、広葉雑灌木等極め
て広汎に及んでおり、ヒノキ、スギ、マツ等の有
用樹種に薬害を及ぼすことなく、これら広汎の有
害植物を効果的に防除する除草剤が強く望まれて
いる。本発明の一成分であるDUPCは非農耕地用除草
剤としてまた優れた林地用選択的落葉剤として知
られている。一方、テトラピオンは、イネ科雑草のササ類等
に対して、高い除草効果を示すが、広葉雑草には
十分な効果がみられない。本発明者らは、これら２剤の各種割合の混合剤
について林地用除草剤としての各種試験を行なつ
た結果、ヒノキ、スギ、マツ等の有用樹種に安全
性が高く、しかも広汎の有害植物を効果的に防除
することを見い出した。本発明方法が高い防除効
果を示す有害植物は広汎に及ぶが、このうち例と
して下記のものがあげられる。ノビエ、エノコログサ、メヒシバ、オヒシバ、
スズメノカタビラ、シロザ、イヌビユ、イヌタ
デ、ハコベ、カタバミ、ブタクサ、オナモミ、ア
メリカセンダングサ、セイタカアワダチソウ、カ
ラスムギ、イヌムギ、オオバコ、ヨモギ、スス
キ、チガヤ、ササ類、クズ、コナラ、アカシデ、
コゴメウツギ、ツツジ、ニシキギ、クロモジ、サ
カギ等である。これらの有害植物の防除効果は、各単剤からは
予測し得ない様な相乗的な作用であり、本発明方
法に係る組成物は優れた林地用除草剤、また非農
耕地用除草剤であることを確信するに至つた。本発明方法に係る組成物の配合量について有効
な混合範囲を示せば、DUPCとテトラピオンの重
量比で１：６ないし８：１であつて、さらに望ま
しくは１：３ないし３：１の混合割合である。ま
た処理薬量は有効成分として10アール当たり
DUPC200〜800gおよびテトラピオン100〜600g
であつて、さらに望ましくはDUPC200〜600gお
よびテトラピオン200〜600gである。また、本発
明方法に係る組成物を、林地、あるいは非農耕地
用除草剤として施用する場合には、農薬製剤上慣
用の製剤化方法を応用して例えば乳剤、水和剤、
粒剤、粉剤、フロワブル等の各種剤型に製剤する
ことが好ましい。なお、作用の範囲を拡大するために、他の除草
剤、殺虫剤、殺菌剤、あるいは植物生長調節剤、
肥料等を混合することができる。次に代表的な剤形の実施例をあげるが、有効成
分の混合比は前述の範囲で変更し得ることはいう
までもない。説明文中“部”は重量部を示す。製剤例１（粒剤） DUPC2部、テトラピオン４部、ベントナイト
20部、クレー69部、ポリオキシエチレンアルキル
アリールエーテル５部、水約20部を加えて混ねり
機で練つたあと、造粒機を通して造粒し、次いで
乾燥整粒して有効成分６％を含有する粒剤を得
る。製剤例２（水和剤） DUPC25部、テトラピオン50部、ケイソウ土８
部、クレー10部、ホワイトカーボン２部、ポリオ
キシエチレンアルキルアリールエーテルスルホン
酸ソーダ３部及びアルキルナフタレンスルホン酸
ソーダ２部を混合粉砕して有効成分を50％含有す
る水和剤を得る。製剤例３（粉剤） DUPC2部、テトラピオン４部、ホワイトカー
ボン２部、クレー92部を混和し、有効成分６％の
粉剤を得る。本発明による雑草および雑灌木に対する防除効
果を示すために、代表的な実施例として試験例を
いくつかあげて更に具体的に説明する。試験例１スギ（３年生）、ヒノキ（３年生）、アカマツ
（３年生）、クズ（３年生）、ツツジ（３年生）、コ
ゴメウツギ（３年生）、コナラ（３年生）を1m×
1mのコンクリートポツトに育成し、DUPC、テ
トラピオン及び両剤の混合剤の所定量を処理し
た。処理後２ケ月に植物に対する除草効果を調査
した。除草効果は肉眼観察し０：効果なし〜５：
完全枯死の６段階の指数にて表−１に表示した。試験例２直径約18cmの素焼鉢にササ、チガヤ、ヨモギを
それぞれ育成し、DUPC、テトラピオン及び両剤
の混合剤の所定量を処理した。薬剤散布した６週
間後に試験例１と同様な基準で調査し、６段階の
指数で表示した。試験結果は表２のとおりであ
る。尚、処理時の草丈は、ササ15cm、チガヤ24cm、
ヨモギ18cmであつた。試験例３ 850cm²のプラスチツクバツトに畑土壌をつめ、
ノビエ、メヒシバ、エノコログサ、カラスムギ、
イヌムギ、イヌタデ、オナモミ、ブタクサを播種
後１cmの覆土をし、３週間後にDUPC、テトラピ
オン及び両剤の混合剤の所定量を処理した。薬剤
散布３週間後に試験例１と同様な基準で調査し、
６段階の指数で表示した。試験結果は表３のとお
りである。試験例４スギ造林地（移植４年目）を１区４m²に区割
し、DUPC、テトラピオン及び両剤の混合剤の所
定量を処理した。処理後３ケ月後に試験例１と同
様な基準で調査し、６段階の指数で表示した。試験結果は表４の通りである。 The present invention provides 3-(3,3-dimethylureido)
Phenyl tert-butyl carbamate (hereinafter referred to as
Forest land and non-agricultural land treated with a herbicide composition containing a specific ratio of DUPC) and 2,2,3,3-tetrafluoropropionic acid (hereinafter referred to as tetrapion) as active ingredients. and methods for controlling weeds and shrubs in non-agricultural lands. In forestry areas, whether in artificial afforestation or naturally regenerated forest areas, it is important to remove harmful plants or suppress the growth of useful tree species such as cedar, cypress, and pine during their young stages. In general, the harmful plants that cause problems in forest areas are extremely wide-ranging, including annual weeds, bamboo grass, kudzu, and broad-leaved shrubs. There is a strong need for herbicides that effectively control. DUPC, which is a component of the present invention, is known as a herbicide for non-agricultural land and as an excellent selective defoliant for forest land. On the other hand, tetrapions have a high herbicidal effect against grass grasses, but are not sufficiently effective against broad-leaved weeds. The present inventors have conducted various tests on mixtures of these two agents in various ratios as herbicides for forest land, and have found that they are highly safe for useful tree species such as cypress, cedar, and pine, and are effective against a wide range of harmful plants. was found to effectively control. There are a wide range of harmful plants for which the method of the present invention exhibits a high control effect, and examples of these include the following. Nobie, foxtail grass, crabgrass, ohishiba,
Sparrow fern, silverwort, dogweed, Japanese knotweed, chickweed, oxalis, ragweed, Japanese fir, American chiliflower, goldenrod, oat, dogwheat, plantain, mugwort, pampas grass, Japanese oak, bamboo grass, kudzu, Quercus serrata, red hornbeam,
These include Kogometsugi, Azalea, Nishikigi, Kuromoji, and Sakagi. The control effect on these harmful plants is a synergistic effect that cannot be predicted from each agent alone, and the composition according to the method of the present invention is an excellent herbicide for forest land and non-agricultural land. I have come to believe that there is one thing. The effective mixing range for the amount of the composition according to the method of the present invention is that the weight ratio of DUPC to tetrapion is 1:6 to 8:1, more preferably 1:3 to 3:1. It is. In addition, the processing amount is per 10 ares as an active ingredient.
DUPC200~800g and tetrapion 100~600g
More preferably, the amount is 200 to 600 g of DUPC and 200 to 600 g of tetrapion. In addition, when the composition according to the method of the present invention is applied as a herbicide for forest land or non-agricultural land, it is possible to apply formulation methods commonly used for agricultural chemical formulations, such as emulsions, wettable powders, etc.
Preferably, it is formulated into various dosage forms such as granules, powders, and flowables. In addition, in order to expand the range of action, other herbicides, insecticides, fungicides, or plant growth regulators,
Fertilizer etc. can be mixed. Next, examples of typical dosage forms will be given, but it goes without saying that the mixing ratio of the active ingredients can be varied within the above-mentioned range. "Parts" in the description indicate parts by weight. Formulation example 1 (granules) 2 parts DUPC, 4 parts tetrapion, bentonite
After adding 20 parts of clay, 69 parts of clay, 5 parts of polyoxyethylene alkylaryl ether, and about 20 parts of water, kneading with a mixer, granulating with a granulator, and then drying and sizing to obtain 6% of the active ingredient. Obtain granules containing: Formulation example 2 (hydrating powder) 25 parts of DUPC, 50 parts of tetrapion, 8 parts of diatomaceous earth
10 parts of clay, 2 parts of white carbon, 3 parts of sodium polyoxyethylene alkylaryl ether sulfonate, and 2 parts of sodium alkylnaphthalene sulfonate are mixed and ground to obtain a wettable powder containing 50% of the active ingredient. Formulation Example 3 (Powder) 2 parts of DUPC, 4 parts of Tetrapion, 2 parts of White Carbon, and 92 parts of clay are mixed to obtain a powder containing 6% active ingredient. In order to demonstrate the effect of controlling weeds and miscellaneous shrubs according to the present invention, some test examples will be given as representative examples and will be explained in more detail. Test example 1 Japanese cedar (3rd grade), Japanese cypress (3rd grade), Japanese red pine (3rd grade), kudzu (3rd grade), azalea (3rd grade), Japanese cedar (3rd grade), and Quercus serrata (3rd grade) at 1m
They were grown in 1m concrete pots and treated with prescribed amounts of DUPC, tetrapion, and a mixture of both drugs. Two months after treatment, the herbicidal effect on plants was investigated. The weeding effect was visually observed: 0: no effect to 5:
Table 1 shows the six-stage index of complete death. Test Example 2 Bamboo shoots, bamboo shoots, and mugwort were grown in clay pots with a diameter of approximately 18 cm, and treated with predetermined amounts of DUPC, tetrapion, and a mixture of both drugs. Six weeks after the chemical spraying, a survey was conducted using the same criteria as in Test Example 1, and the results were expressed using a 6-level index. The test results are shown in Table 2. In addition, the plant height at the time of treatment was 15 cm for Sasa, 24 cm for Chigaya,
The mugwort was 18cm long. Test example 3 Fill an ^850cm2 plastic bag with field soil.
Novie, crabgrass, hackberry, oat,
After sowing dog wheat, Japanese knotweed, Japanese knotweed, and ragweed, the soil was covered with 1 cm of soil, and 3 weeks later, it was treated with predetermined amounts of DUPC, tetrapion, and a mixture of both drugs. Three weeks after the chemical spraying, an investigation was conducted using the same criteria as in Test Example 1.
It was expressed using a 6-level index. The test results are shown in Table 3. Test Example 4 A cedar plantation (4th year after transplantation) was divided into 4 m ² sections and treated with prescribed amounts of DUPC, tetrapion, and a mixture of both drugs. Three months after the treatment, the results were investigated using the same criteria as in Test Example 1 and expressed using a 6-level index. The test results are shown in Table 4.

【表】【table】

【表】以上の結果より、DUPCとテトラピオンの混合
剤は雑灌木、クズ、ササ、チガヤ、等の林地の有
害植物、及び非農耕地の一年生及び多年生雑草に
対して相乗的な効果を示し、ヒノキ、スギ、マツ
等の有用樹種に対して薬害もみられないことか
ら、林地用除草剤あるいは非農耕地用除草剤とし
て応用することができる。[Table] From the above results, the mixture of DUPC and tetrapion shows a synergistic effect on harmful plants in forest areas such as miscellaneous shrubs, kudzu, bamboo grass, and bamboo grass, as well as annual and perennial weeds in non-agricultural areas. Since no chemical damage is observed to useful tree species such as cypress, cedar, and pine, it can be applied as a herbicide for forest land or non-agricultural land.

Claims

[Claims]

1 3-(3,3-dimethylureido)phenyl tert-butyl carbamate and 2,2,3,
A herbicide composition containing 3-tetrafluoropropionic acid as an active ingredient in a weight ratio of 1:3 to 3:1 per 10 ares as an active ingredient.
A method for controlling weeds and shrubs in forest land and non-agricultural land, characterized by treating 400g to 1200g.