Abscission compositions
AssigneeHoffmann-La Roche Inc.
InventorWilliam Szkrybalo
Life of this patent
Estimating the term…
Abstract
Abscission compositions containing as the active ingredients 2,3:4,6-di-O-(substituted)-2-keto-L-gulconic acids, salts and esters thereof and, preferably, 2,3:4,6-di-O-isopropylidene-2-keto-L-gulonic acid, its salts and esters are described.
Claims15
An abscission composition comprising inert carrier material, and as an active abscission ingredient, an amount effective for abscission of a compound of the formula ##STR5## wherein, when n is 1, R" is hydrogen, sodium, potassium, ammonium, substituted ammonium wherein the substitutents are one or more of lower alkyl, lower alkenyl or hydroxy (lower alkyl), straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, or halo-lower alkyl and, when n is 2, R" is calcium or lower alkylene;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen, straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, halo-lower alkyl, phenyl or phenyl residue having one or more lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy or halo-loweralkoxy substituents thereon or R.sub.1 and R.sub.2 together and R.sub.3 and R.sub.4 together are each a saturated ring containing from 3 to 8 carbon atoms;
- n is an integer from 1 to 2 and X is a number from 0 to 1;
- enantiomers and racemates.
A wettable dry powder composition comprising, in percents by weight based on the total weight of the dry powder, from about 3 to about 10% of a surfactant, from about 1 to about 5% of an anti-caking compound, from about 0.1 to about 1% of an anti-foaming agent, from about 0.4 to about 1.5% of a buffer and from about 82.5 to about 94.5% of a compound of the formula ##STR7## wherein, when n is 1, R" is hydrogen, sodium, potassium, ammonium, substituted ammonium wherein the substitutents are one or more of lower alkyl, lower alkenyl or hydroxy (lower alkyl), straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, or halo-lower alkyl and, when n is 2, R" is calcium or lower alkylene;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen, straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, halo-lower alkyl, aryl or R.sub.1 and R.sub.2 together and R.sub.3 and R.sub.4 together are each a saturated ring containing from 3 to 8 carbon atoms;
- n is an integer from 1 to 2 and X is a number from 0 to 1;
- enantiomers and racemates.
A sprayable aqueous solution for stimulating abscission in fruit-bearing trees and bushes which comprises, in percents by weight based on the weight of the solution, as the active ingredient, from about 0.05 to about 1.5% of a compound of the formula ##STR9## wherein, when n is 1, R" is hydrogen, sodium, potassium, ammonium, substituted ammonium wherein the substitutents are one or more of lower alkyl, lower alkenyl or hydroxy (lower alkyl), straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, or halo-lower alkyl and, when n is 2, R" is calcium or lower alkylene;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen, straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched chain alkynyl of from 2 to 20 carbon atoms, halo-lower alkyl, aryl or R.sub.1 and R.sub.2 together and R.sub.3 and R.sub.4 together are each a saturated ring containing from 3 to 8 carbon atoms;
- n is an integer from 1 to 2 and X is a number from 0 to 1;
- enantiomers and racemates
- and from about 0.1 to about 0.5% of a surface-active agent.
A sprayable aqueous solution for stimulating abscission in fruit-bearing trees and bushes which comprises, in percents by weight based on the weight of the solution, as the active ingredient, from about 0.05 to about 1.5% of a compound of the formula ##STR10## wherein, where n is 1, R' is hydrogen, sodium, potassium ammonium, substituted ammonium wherein the substitutents are one or more of lower alkyl, lower alkenyl or hydroxy (lower alkyl), straight or branched chain alkyl of from 1 to 20 carbon atoms, straight or branched chain alkenyl of from 2 to 20 carbon atoms, straight or branched alkynyl of from 2 to 20 carbon atoms or halo-lower alkyl and when, n is 2, R' is calcium, magnesium or lower alkylene, n is an integer from 1 to 2 and X is a number of from 0 to 1, enantiomers and racemic mixtures.
- and from about 0.1 to about 0.5% of a surface-active agent.
Dependencies are inferred from the claim text.