CH480786A - Verwendung von Pyridinverbindungen zur Bekämpfung unerwünschter Vegetation - Google Patents

Verwendung von Pyridinverbindungen zur Bekämpfung unerwünschter Vegetation

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Publication number
CH480786A
CH480786A CH349469A CH349469A CH480786A CH 480786 A CH480786 A CH 480786A CH 349469 A CH349469 A CH 349469A CH 349469 A CH349469 A CH 349469A CH 480786 A CH480786 A CH 480786A
Authority
CH
Switzerland
Prior art keywords
sep
use according
active ingredient
pyridine compounds
post
Prior art date
Application number
CH349469A
Other languages
English (en)
Inventor
John Clayton Colin
Hartley David
Original Assignee
Ici Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB51579/64A external-priority patent/GB1059990A/en
Application filed by Ici Ltd filed Critical Ici Ltd
Publication of CH480786A publication Critical patent/CH480786A/de

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/70—Sulfur atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/116—Heterocyclic compounds
    • A23K20/132—Heterocyclic compounds containing only one nitrogen as hetero atom
    • C—CHEMISTRY; METALLURGY
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    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/61—Halogen atoms or nitro radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/63—One oxygen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/63—One oxygen atom
    • C07D213/68—One oxygen atom attached in position 4
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
    • C07D213/73—Unsubstituted amino or imino radicals
    • C—CHEMISTRY; METALLURGY
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
    • C07D213/74—Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
    • C07D213/75—Amino or imino radicals, acylated by carboxylic or carbonic acids, or by sulfur or nitrogen analogues thereof, e.g. carbamates
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    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
    • C07D213/76—Nitrogen atoms to which a second hetero atom is attached
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
    • C07D213/76—Nitrogen atoms to which a second hetero atom is attached
    • C07D213/77—Hydrazine radicals
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    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
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    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
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    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
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    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
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    • C07D213/84—Nitriles

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Description


  



  Verwendung von Pyridinverbindungen zur Bekämpfung unerwünschter Vegetation
Die vorliegende Erfindung bezieht sich auf die Verwendung von Pyridin-4-thiolen der Formel zur   Bekämp-    fung von unerwünschter Vegetation, insbesondere von Unkraut. Auch die entsprechenden Salze sowie   Thioät-    her zeigen diese phytotoxische Wirkung.



   Das Verfahren zur Herstellung der genannten Thiole sowie deren Salze von Aether, welche die Formel
EMI1.1     
 worin X2, X3,   Xó    und X6 gleich oder verschieden sein können und Fluor oder Chlor und Y Wasserstoff, den Rest eines Salzes oder den Rest einer Aethergruppe bedeuten, ist im schweizerischen Patent Nr. 472 354 beschrieben.



   Das Produkt bildet mit einer grossen Zahl von organischen und anorganischen Basen Salze. Ferner kann es in entsprechende   Thioäther    übergeführt werden.



  Geeignete Salze sind insbesondere die wasserlöslichen Salze, z. B. die Alkali-und Erdalkalimetallsalze. Geeignete   Thioäther    sind die Alkyl- (z. B. Methyl), Alkenyl (z. B. Allyl), Aryl- (z. B. Benzyl) oder heterocyclischen (z. B. Pyridyl)   Thioäther.   



   Unkrautvertilgende Gemische
Die bevorzugten Verbindungen zur Verwendung in unkrautvertilgenden Gemischen sind diejenigen Thiole,    worin mindestens einer der Substituenten X2, X3, X5 5    und   Xe    ein Fluoratom ist. Solche Verbindungen sind z. B. Chlor-trifluorpyridin-4-thiole, dessen Salze und
Aether, z. B. 3-Chlor-2, 5, 6-trifluor-pyridin-4-thiol,
Dichlor-difluorpyridin-4-thiole, deren Salze und Aether, z. B. 3, 5-Dichlor-2, 6-difluor-pyridin-4-thiol, und
Trichlor-fluorpyridin-4-thiole deren S alze und Aether, z. B. 3, 5, 6-Trichlor-2-fluor-pyridin-4-thiol.



   Die erwähnten unkrautvertilgenden Gemische   kön-    nen entweder fest oder flüssig sein. Feste   unkrautvertil-    gende Gemische können in Form eines Pulvers vorlie gen, in welchem eine geringe Menge des Wirkstoffes mit einer   grösseren    Menge eines festen Verdünnungsmittels vermischt ist. Geeignete feste Verdünner sind z. B. pulverförmiges Kaolin, Bleicherden, Gips, Kalk, Hewitt sche Erde oder Tonerde.



   Im allgemeinen werden flüssige unkrautvertilgende Gemische bevorzugt, da sie zweckmässiger verwendet werden können. Flüssige unkrautvertilgende Gemische bestehen im allgemeinen aus einer wässrigen Dispersion des Wirkstoffes in ein oberflächenaktives Mittel enthaltendem Wasser. Der Wirkstoff kann als feste Teilchen oder als Tröpfchen einer Lösung des Wirkstoffes in einem in Wasser unlöslichen Lösungsmittel im Gemisch vorliegen. Mitverwendbare oberflächenaktive Mittel sind z. B. Kondensationsprodukte von Aethylenoxyd mit verschiedenen Substanzen, z. B. mit alkylierten Phenolen, z. B. Octylphenol oder   Nonylphenol ; Sorbitanmonolau-    rat, Oleylalkohol, Cetylalkohol oder Propylenoxyd-polymer.

   Andere ebenfalls befriedigende oberflächenaktive Mittel sind ferner Calciumdedecylbenzolsulfonat, Cal  ciumlignosulfonat,      Natriumlignosulfonat    oder Ammoniumlignosulfonat. Solche Gemische können hergestellt werden, indem man den Wirkstoff in einem organischen Lösungsmittel löst und die Lösung hierauf mit dem das oberflächenaktive Mittel enthaltenden Wasser schüttelt. 



  Vorzugsweise werden zuerst sowohl das   oberflächenakti-    ve Mittel als auch der Wirkstoff im Lösungsmittel gelöst, worauf die Lösung mit Wasser geschüttelt wird.



   Die Mengen Wirkstoff, die im Gemisch verwendet werden können, können innerhalb weiter Grenzen variieren, je nach dem zu verwendenden Wirkstoff und dem zu vertilgenden Unkraut bzw. dessen Samen. Im allgemeinen werden mit 0, 1 bis 2, 0   Gew.- /o enthaltenden    Gemischen gute Ergebnisse erzielt, doch können manchmal   grössere    oder geringere Mengen erwünscht sein.



   Die Gemische werden   zweckmässig    in Form eines Konzentrates geliefert, das eine   grössere    Konzentration an Wirkstoff enthält und deshalb im allgemeinen vor seiner Verwendung verdünnt werden muss,   normalerwei-    se mit Wasser. Die Konzentrate können 10 bis 80, vorzugsweise 25 bis 70   Gew.- /o    Wirkstoff enthalten.



   Besonders vorteilhaft ist ein Konzentrat, das den Wirkstoff zusammen mit einem oberflächenaktiven Mittel und einem Suspensionsmittel enthält, das in Wasser fein dispergiert worden ist. Bevorzugt werden Suspensionsmittel, die dem Konzentrat thixotrope Eigenschaft verleihen und seine Viskosität erhöhen, wie z. B. wasserlösliche, wasserhaltige, kolloidale Mineralsilikate und organische Substanzen mit einem hohen Molekulargewicht. Bevorzugte Suspensionsmittel sind   Montmorillo-    nit, Beidellit,   Nontronit,    Hectorit, Saponit, Saucorit, Cellulose-Derivate und Polyvinylalkohol. Besonders bevor  zugte Konzentrate    enthalten Bentonit als Suspensionsmittel.

   Eine weitere Form des Konzentrates besteht aus einem benetzbaren Pulver, d. h. einem Gemisch des feinverteilten Wirkstoffes mit einem festen   oberflächen-    aktiven Mittel, entweder mit oder ohne zusätzlichen festen Verdünner. Wenn es mit Wasser geschüttelt wird, löst sich das oberflächenaktive Mittel auf und fördert die Streuung des feinverteilten Wirkstoffes.



   Das Gemisch kann zur Bekämpfung einer grossen Zahl breit-und schmalblättriger Gräser, wie z.   B.    Poa annua, Alopecurus myosuroides, Polygonum persicaria oder Matricaria inodurata, verwendet werden.



   Die Gemische können als unkrautvertilgende Mittel mit   Frühwirkung    verwendet werden. Zu diesem Zweck werden sie auf den Unkrautsamen enthaltenden Boden aufgetragen und verbleiben lange genug darin, um entweder die Samen zu töten oder die Sämlinge, die sie bilden, zu vernichten oder zu beschädigen. Die Gemische können auch in herkömmlicher Weise als Unkrautvertilger mit   Spätwirkung    verwendet werden. Sie werden dann gegen das bereits stehende Unkraut angesetzt. Ein Gemisch, das mit gutem Erfolg für den einen Zweck verwendet werden kann, ist nicht immer für den anderen Zweck wirksam genug, weshalb gewisse einfache Versuche erforderlich sein können, um zu bestimmen, welches Gemisch gegen das zu vertilgende Unkraut verwendet werden soll, damit die besten Ergebnisse erzielt werden.



   Versuch 1
Dieses und die folgenden Versuche beschreiben die Herstellung von die neuen Verbindungen enthaltenden unkrautvertilgenden Gemischen sowie Versuche zur Veranschaulichung der phytotoxischen Eigenschaften derselben. Bei gewissen Versuchen wurden Pflanzen verwendet, die normalerweise nicht als Unkraut   betrach-    tet werden, die jedoch zur Bestimmung der phytotoxischen Wirkung nützlich sind.



   Die Gemische wurden hergestellt, indem der Wirkstoff feingemahlen wurde und dann   1      Gewichts- /o    des pulverförmigen Materials in Wasser dispergiert wurde, das   1      Gew.- /o    eines unter der Bezeichnung     AGRA   90    (eingetragenes Warenzeichen) erhältlichen   oberflächen-    aktiven Mittels enthielt. Um das Mahlen der Wirkstoffe zu erleichtern, wurde ein geringer Anteil des in den erzielten Gemischen vorhandenen oberflächenaktiven Mittel während des Mahlvorganges zugefügt.



   Die vorher und die nachher eintretende unkrautvertilgende Wirkung der Gemische wurde wie folgt geprüft :
In den Versuchen zur Prüfung der Frühwirkung des Gemisches wurden Blumentöpfe mit Kompost gefüllt und darin Furchen gemacht. Der Kompost wurde mit der zu prüfenden Lösung behandelt und Samen in die Furchen gesät, die dann zugedeckt wurden, so dass der Samen mit Kompost überdeckt war. Nach Ablauf von 21 Tagen wurde die Anzahl gesunder Setzlinge, die sich zu entwickeln vermochten, mit der Anzahl derjenigen verglichen, die in Töpfen wuchsen, deren Inhalt nicht mit einem zu prüfenden Gemisch behandelt worden war.



   In den Versuchen zur Bestimmung der unkrautvertilgenden   Spätwirkung    wurde Samen in Blumentöpfe gesät.



  Man liess ihn sich bis zu Setzlingen der Zweiblatt-Stufe entwickeln. Diese Setzlinge wurden dann mit einem zu prüfenden Gemisch besprüht und nach   14    Tagen die Anzahl beschädigter oder zerstörter Setzlinge bestimmt.



   Die Ergebnisse der Versuche, bei denen der Wirkstoff 2,   6-Difluor-3,    5-dichlorpyridin-4-thiol war, sind in Tabelle I angegeben. Die Zahlen in der ersten Kolonne unter dem Namen der jeweiligen Prüflingspflanze gibt den Prozentsatz der Pflanzen an, die sich bei der Bestimmung der   Frühwirkung    (Pre) nicht zu unbeschädigten Setzlingen entwickelten, während die zweite Kolonne den Prozentsatz der Setzlinge angibt, die bei der Bestimmung der   Spätwirkung    (Post) beschädigt oder zerstört wurden.



  Tabelle I
EMI2.1     

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<tb>  <SEP> 60 <SEP>    4080 <SEP> 4080 <SEP> 60    <SEP> 
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Versuch 2
Ein ähnlicher Versuch wurde unter Verwendung von 2-Fluor-3, 5, 6-trichlorpyridin-4-thiol als Wirkstoff ausgeführt. Die Ergebnisse sind in Tabelle II angegeben.



   Tabelle II
EMI3.1     

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<tb>  <SEP> 100 <SEP> 0 <SEP> 100 <SEP> 10 <SEP> 50 <SEP> 20 <SEP> 100
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Versuch 3
Ein ähnlicher Versuch wurde unter Verwendung von 3-Chlor-2, 5, 6-trifluorpyridin-4-thiol als Wirkstoff ausgeführt. Die Ergebnisse sind in Tabelle III   zusammengefasst.   



   Tabelle III
EMI3.2     

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<tb>  <SEP> 0 <SEP> 60 <SEP> 0 <SEP> 100 <SEP> 0 <SEP> 80 <SEP> 0 <SEP> 100
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Versuch 4
Ein   ahnlicher    Versuch wurde unter Verwendung vor 2, 3,   5,      6-Tetrachlorpyridin-4-thiol    als Wirkstoff ausge  fiihrt.    Die Ergebnisse sind in Tabelle IV angegeben.



   Tabelle IV
EMI3.3     

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Versuch 5
Ein ähnlicher Versuch wurde unter Verwendung des Allyl-äthers von 2, 3, 5, 6-Tetrachlorpyridin-4-thiol als Wirkstoff ausgeführt. Die Ergebnisse sind in Tabelle V   zusammengefasst.   



   Tabelle V
EMI3.4     

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Claims (1)

  1. PATENTANSPRUCH Verwendung von Pyridinverbindungen der Formel : EMI4.1 worin X2, X3, X5 und X6 gleich oder verschieden sein können und Fluor oder Chlor und Y Wasserstoff, den Rest eines Salzes oder den Rest einer Aethergruppe bedeuten, zur Bekämpfung unerwünschter Vegetation.
    UNTERANSPRtJCHE 1. Verwendung nach Patentanspruch zur Vertilgung von Unkraut.
    2. Verwendung nach Unteranspruch 1, dadurch gekennzeichnet, dass die Pyridinverbindungen zusammen mit einem festen Verdünnungsmittel verwendet werden.
    3. Verwendung nach Unteranspruch 1, dadurch gekennzeichnet, dass ein Gemisch der Pyridinverbindungen mit einem flüssigen Verdünnungsmittel und einem oberflächenaktiven Mittel verwendet wird.
    4. Verwendung nach Unteranspruch 3, dadurch gekennzeichnet, dass das Gemisch 3, eine wässrige Dispersion darstellt.
    5. Verwendung nach den Unteransprüchen 2 bis 4, dadurch gekennzeichnet, dass das Gemisch 0, 1 bis 2, 0 Gew.- /o Wirkstoff enthält.
    6. Verwendung nach Patentanspruch, dadurch gekennzeichnet, dass die Pyridinverbindungen, in Form eines Konzentrates, das 10 bis 80 Gew : /o Wirkstoff enthält, verwendet werden.
    7. Verwendung nach Unteranspruch 4, dadurch gekennzeichnet, dass die wässrige Dispersion ein oberflä- chenaktives Mittel und ein Suspensionsmittel in feiner Verteilung enthält.
CH349469A 1964-12-18 1965-12-20 Verwendung von Pyridinverbindungen zur Bekämpfung unerwünschter Vegetation CH480786A (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB51579/64A GB1059990A (en) 1964-12-18 1964-12-18 Substituted pyridines
GB33064/66A GB1161492A (en) 1964-12-18 1965-08-19 Fluoropyridines useful inter alia as Herbicides
GB35596/65A GB1161491A (en) 1964-12-18 1965-08-19 Fluoropyridine Herbicides
GB4890465 1965-08-19
CH1751165A CH472353A (de) 1964-12-18 1965-12-20 Verfahren zur Herstellung von Pyridin-4-thiolen

Publications (1)

Publication Number Publication Date
CH480786A true CH480786A (de) 1969-11-15

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ID=27509548

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Application Number Title Priority Date Filing Date
CH349469A CH480786A (de) 1964-12-18 1965-12-20 Verwendung von Pyridinverbindungen zur Bekämpfung unerwünschter Vegetation

Country Status (1)

Country Link
CH (1) CH480786A (de)

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