Phenylglyoxylonitrile-2-oxime-cyanomethyl ether as a crop safener
AssigneeCiba-Geigy Corporation
InventorHenry Martin
Life of this patent
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Abstract
The new compound phenylglyoxylonitrile-2-oxime-cyanomethylether of the formula ##STR1## and compositions containing it, are used as a safener (antidote) for selectively combatting weeds in culture crops, especially sorghum and rice, in order to protect these cultivated plants from being injured by strong herbicides such as chloroacetanilides and thiolcarbamates. The safener is preferably applied to the crop seeds prior to planting.
Claims9
A method for protecting crops from injury caused by application of a herbicidal thiocarbamate of the formula ##STR8## wherein R.sub.6 is lower alkyl, lower alkenyl, chloroallyl, dichloroallyl, trichloroallyl or p-chlorobenzyl,
- R.sub.7 is lower alkyl having at least 2 carbon atoms, and
- R.sub.8 is lower alkyl having at least 2 carbon atoms or cyclohexyl or wherein
- R.sub.7 and R.sub.8 together with the nitrogen atom form the hexahydro-1H-azepin ring or the decahydroquinoline or 2-methyl-decahydroquinoline ring,
- said method comprising applying to the crop seeds, a crop protecting amount of phenylglyoxylonitrile-2-oxime-cyanomethyl ether.
A method for selectively controlling weeds in sorghum cultures which comprises applying to a culture of sorghum grown from seeds treated with a safening amount of phenylglyoxylonitrile-2-oxime-cyanomethyl ether, a herbicidally effective amount of a thiocarbamate compound of the formula ##STR9## wherein R.sub.6 is lower alkyl, lower akenyl, chloroallyl, dichloroallyl, trichloroallyl or p-chlorobenzyl,
- R.sub.7 is lower alkyl having at least 2 carbon atoms, and
- R.sub.8 is lower alkyl having at least 2 carbon atoms or cyclohexyl or wherein
- R.sub.7 and R.sub.8 together with the nitrogen atom form the hexahydro-1H-azepin ring or the decahydroquinoline or 2-methyl-decahydroquinoline ring.
Rice or sorghum seed, the plants grown from which are resistant to injury by pre-emergence application of a herbicidal compound of the formula ##STR10## wherein R.sub.6 is lower alkyl, lower alkenyl, chloroallyl, dichloroallyl, trichloroallyl or p-chlorobenzyl,
- R.sub.7 is lower alkyl having at least 2 carbon atoms, and
- R.sub.8 is lower alkyl having at least 2 carbon atoms or cyclohexyl or wherein
- R.sub.7 and R.sub.8 together with nitrogen atom form the hexahdro-1H-azepin ring or the decahydroquinoline or 2-methyl-decahydroquinoline ring,
- said seed being coated with phenylglyoxylonitrile-2-oxime-cyanomethyl ether in an amount ranging from about 5 to about 500 grams per 100 kilograms of seed.
A method for protecting a sorghum crop from injury caused by application of the herbicide S-ethyl-N,N-diisobutylthiocarbamate, which method comprises applying to the soil in the rows of seed, prior to treatment with said herbicide, a crop-protecting amount of phenylglyoxylonitrile-2-oxime-cyanomethyl ether.
A method for protecting crops from injury caused by the application of S-ethyl-N,N-diisobutylthiocarbamate which comprises treating crop seeds with a crop-protecting amount of phenylglyoxylonitrile-2-oxime-cyanomethyl ether.
Dependencies are inferred from the claim text.