Shaped bodies which release agrochemical active substances

Details Shaped bodies which release agrochemical active substances Shaped bodies which release agrochemical active substances

2001-04-24

2004-01-20

Wang, Shengjun (Department: 1617)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

C424S409000, C424S405000, C424S422000, C424S501000, C424S489000, C514S341000, C514S772300, C514S772400, C514S772500

Reexamination Certificate

active

06680065

ABSTRACT:

The invention relates to shaped articles which release agrochemical active compounds, are used for treatment of woody plants and comprise a water-insoluble thermoplastically processable polymer, a water-soluble polymer and one or more agrochemical active compounds.
BACKGROUND OF THE INVENTION
The incorporation of agrochemical active compounds into polymers is known, for example from DE-A 4 432 126, WO 91/4732, WO 94/8455, EP-A 524 831, WO 91/3940, EP-A 404 727, EP-A 254 196, JP-A 58/39 602.
Polymer mixtures of a water-containing hydrophilic polymer and water-insoluble thermoplastic polymer are known from EP-A 0 344 118 as a carrier material for active compounds, the shaped articles obtained from this material having an improved dimensional stability in damp air. In water, these materials swell very severely and as a result increase their volume several-fold.
A method for plant treatment in which shaped articles of agrochemical active compounds and a solid carrier are introduced into the sap flow of plants is known from EP-A 564 945.
SUMMARY OF THE INVENTION
The present invention relates to shaped articles which release agrochemical active compounds, are used for treatment of woody plants and
are employed in a hollow preformed in the woody plant,
are of a volume which fills the volume of the hollow to the extent of 10 to 95%,
are of a volume which does not increase during the period of use to the extent that the preformed hollow space is filled completely, comprise
a) agrochemical active compounds,
b) water-insoluble thermoplastically processable polymers,
c) water-soluble polymers and
d) if appropriate further auxiliaries.
DEATILED DESCRIPTION OF THE INVENTION
The shaped articles according to the invention are suitable for treatment of all types of woody plants, in particular trees and shrubs. Ornamental and crop woody plants are included. Use on trees is particularly advantageous. The trunk circumference of the trees can vary here within a wide range, for example from 6 cm to 200 cm.
The size of the hollow form depends on the circumference of the shoot axes (trunk, bough, branch) in which the implant is to be employed. For trunks with a circumference from 20 cm upwards, cylindrical hollow forms with a diameter of 0.2 to 1.0 cm and a length of 2.0 to 4.0 cm are particularly suitable. Several hollow forms are expediently located on thicker trunks. The hollow form can be produced by drilling, stamping, milling or sawing.
The volume of the shaped article fills the hollow form to the extent of 10 to 95%, preferably to the extent of 50 to 90%. The shape of the body is not critical for the activity, and it can be rod-shaped, cylindrical or conical. Conical bodies with a base area which corresponds to the diameter of the hollow form can be employed such that the hollow form is closed off tightly. However, it is also possible to establish the tight closure with a closing cap or a closing paste, for example of a commercially available grafting wax.
Agrochemical active compounds which may be mentioned are insecticides, fungicides and herbicides.
Insecticides which may preferably be mentioned are organic phosphorous compounds, such as phosphoric acid esters, carbamates, pyrethroids, urea derivatives, such as benzoyl ureas, triazines, agonists or antagonists of the nicotinic acetylcholine receptors of insects. Juvenile hormones and juvenoid synthetic compounds we, for example, pyriproxyfen, methoprene, hydroprene, are also to be mentioned.
The pyrethroids include:
Allethrin=2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyll)-cyclopropane-carboxylate.
Barthrin=(6-chloro-1,3-benzodioxol-5-yl)-methyl 2,2-dimethyl-3-(2-methyl-1-propenyl)-cyclopropane-carboxylate.
Bioresmethrin=[5-(phenyl-methyl)-3-furanyl]-methyl 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Bromethrin=(5-benzyl-3-furyl)methyl 2-(2,2-dibromovinyl)-3,3-dimethylcyclopropane-carboxylate
Cycloethrin=3-(2-cyclopenten-1-yl)-2-methyl-4-oxo-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-propenyl)-cyclopropane-carboxylate.
Dimethrin=2, 4-dimethylbenzyl 2,2,3-(2-methyl-1-propenyl)-carboxylate
Pyresmethrin=3-[(5-benzyl-3-furyl)-methyl]methyl trans-(+)-3-carboxy-&bgr;,2,2-trimethylcyclopropane-acrylate.
Resmethrin=(5-benzyl-3-furyl)-methyl 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Tetramethrin=(1,3,4,5,6,7-hexahydro-1,3-di-oxo-2H-isoindol-2-yl)-methyl 2,2,3-(2-methyl-1-propenyl)-carboxylate.
K-othrin (5-benzyl-3-furyl)-methyl-trans-(+)-3-cyclopentylidene-methyl 2,2-dimethylcyclopropane-carboxylate.
Permethrin (FMC 33297) (NRDC 143)=m-Phenoxybenzyl-cis-trans-(+)-3-(2,2-dichlorovinyl) 2,2-dimethylcyclopropane-carboxylate.
Cinerin I=2-(2-butenyl)-4-hydroxy-3-methyl-2-cyclopenten-1-one 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Pyrethrin I=4-hydroxy-3-methyl-2-(2,4-pentadienyl)-2-cyclopenten-1-one 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Cinerin II=2-(2-butenyl) -4-hydroxy-3-methyl-2-cyclopenten-1-one 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Pyrethrin II=4-hydroxy-3-methyl-2-(2,4-pentadienyl)-2-cyclopenten-1-one 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Jasmolin I=4′,5′-dihydropyrethrin I.
Jasmolin II=4′,5′-dihydropyrethrin II.
Biothanometrin=(5-benzyl-3-furyl)methyl 2,2-dimethyl-3-(2-cyclopentylvinyl)-cyclopropane-carboxylate.
Bioethanomethrin=(3-diphenyl ether)methyl 2-(2,2-dichlorovinyl)-3,3-dimethyl-cyclopropane-carboxylate.
Cypermethrin=(3-diphenyl ether)-cycnomethyl 2-(2,2-dichlorovinyl)-3,3-dimethyl-cyclopropane-carboxylate.
Decamethrin=(3-diphenyl ether)-cyanomethyl 2-(2,2-dibromovinyl)-3,3-dimethyl-cyclopropane-carboxylate.
ES-56=2,3-dihydrofuran 2,2,3-(2-methyl-1-propenyl)-carboxylate.
Fenpropanate (S-3206)=(3-diphenyl ether)cyanomethyl 2,2-dimethyl-3,3-dimethyl-cyclopropane-carboxylate.
Fenvalerate (S-5602)=(3-diphenyl ether)-cyanomethyl [(p-chlorophenyl)-(isopropyl)]-acetate.
(S-5439)=(3-diphenyl ether)methyl[(p-chlorophenyl)-(isopropyl)]-acetate.
Cis-methrin=5-benzyl-3-furylmethyl 2,2,3-(2-methyl-1-propenyl)carboxylate.
Phenothrin=(3-phenoxybenzyl)methyl 2,2,3-(2-methyl-1-propenyl)carboxylate.
Cyfluthrin=4-fluor-3-diphenyl ether-cyanomethylol 2-(2,2-dichlorvinyl)-3,3-dimethylcyclopropane-carboxylate.
The carbamates include:
Aldicarb=2-methyl-2-(methylthio)-propanol O-[(methylamino)carbonyl]oxime.
Aldoxycarb=2-methyl-2-(methylsulfonyl)propanol O-[methylamino)carbonyl]-oxime.
Aminocarb=4-dimethylamino-3-methylphenyl methylcarbamate.
Bendiocarb=2,2-dimethyl-benzo-1,3-dioxol-4-yl N-methylcarbamate.
Bufencarb=3-(1-methylbutyl)phenyl methylcarbamate and 3-(1-ethylpropyl)-phenyl methylcarbamate (3:1).
Butacarb=3,5-bis-(1,1-dimethylethyl)phenyl methylcarbamate.
Butocarboxim=3-methylthio-2-butane O-[(methylamino)carbonyl]oxime.
Butoxycarboxim=3-methylthio-2-butanone O-
0
[(methylamino)carbonyl]oxime.
2-sec.-Butylphenyl methylcarbamate=2-(1-methylpropyl)-phenyl methylcarbamate.
Carbanolate=2-chloro-4,5-dimethylphenyl methylcarbamate.
Carbaryl=1-naphthalenyl methylcarbamate.
Carbofuran=2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate.
Cartap=S,S′-[2-(dimethylamino)-1,3-propanediyl]carbamothicate.
Decarbofuran=2,3-dihydro-2-methylbenzofuran-7-yl methylcarbamate.
Dimetilan=-[(dimethylamino)-carbonyl]-5-methyl-1H-pyrazol-3-yl dimethylcarbamate.
Dioxocarb=2-(1,3-dioxolan-2-yl)-phenyl methylcarbamate.
Ethiofencarb=2-ethylthiomethylphenyl methylcarbamate.
Fenethacarb=3,5-diethylphenyl methylcarbamate.
Formetanate=3-dimethylaminoethyleneaminophenyl methylcarbamate.
Formparanate=3-Methyl-4-dimethylamino-methyleneamino-phenyl methylcarbamate.
Isoprocarb=2-Isopropylphenyl methylcarbamate.
Methiocarb=3,5-dimethyl-4-methylthiophenyl methylcar

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