Plant virus treatment
AssigneeHercules Incorporated
InventorsDavid Samuel Breslow, Arthur A. Chadwick
Life of this patent
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Abstract
It has been found that plant viruses and viroids can be inhibited by treating plants infected with or exposed to viruses or viroids with a virus-inhibiting amount of a maleic acid, maleic anhydride or fumaric acid copolymer.
Claims17
A process of suppressing plant virus growth in plants which comprises applying to the foliage of said plants a plant virus inhibiting amount of at least one agent selected from the copolymers of maleic acid, maleic anhydride or fumaric acid with a monomer selected from 1) divinyl ether;
- 2) allyl esters of monocarboxylic aliphatic acids containing 1 to 17 carbon atoms in the aliphatic chain;
- and 3) olefins having the formula ##STR2## where R is a radical selected from hydrogen, C.sub.1-18 alkyl, aryl containing 1 to 2 rings, alkyl substituted aryl containing 1 to 2 rings and 1 to 12 carbon atoms in the alkyl group, C.sub.3-12 cycloalkyl, and the above defined R radicals substituted with chloro, bromo and fluoro substituents R' is a radical selected from C.sub.1-18 alkyl, aryl containing 1 to 2 rings, alkyl substituted aryl containing 1 to 2 rings and 1 to 12 carbon atoms in the alkyl group, C.sub.3-12 cycloalkyl, and the above defined R' radicals substituted with chloro, bromo and fluoro substituents;
- and R + R' contain no more than 18 carbon atoms;
- their half-amide--half-acids or half-amide--half-nonphytotoxic salts;
- their partially or completely hydrolyzed esters;
- and their nonphytotoxic salts.
A process of protecting plants exposed to plant viruses which comprises applying to the foliage of said plants a plant virus inhibiting amount of at least one agent selected from the copolymers of maleic acid, maleic anhydride or fumaric acid with a monomer selected from 1) divinyl ether;
- 2) allyl esters of monocarboxylic aliphatic acids containing 1 to 17 carbon atoms in the aliphatic chain;
- and 3) olefins having the formula ##STR3## where R is a radical selected from hydrogen, C.sub.1-18 alkyl, aryl containing 1 to 2 rings, alkyl substituted aryl containing 1 to 2 rings and 1 to 12 carbon atoms in the alkyl group, C.sub.3-12 cycloalkyl, and the above defined R radicals substituted with chloro, bromo and fluoro substituents;
- R' is a radical selected from C.sub.1-18 alkyl, aryl containing 1 to 2 rings, alkyl substituted aryl containing 1 to 2 rings and 1 to 12 carbon atoms in the alkyl group, C.sub.3-12 cycloalkyl, and the above defined R' radicals substituted with chloro, bromo and fluoro substituents;
- and R + R' contain no more than 18 carbon atoms;
- their half-amide--half-acids or half-amide--half-nonphytotoxic salts;
- their partially or completely hydrolyzed esters;
- and their nonphytotoxic salts.
Dependencies are inferred from the claim text.