Allied Chemical Corporation

Diamond Shamrock Corporation

Diamond Shamrock Chemicals Company

Han San Ku

Robert E Holm

William J Pyne

A series of ester and salt derivatives of fluorene-9-carboxylic acid and fluorene-1-carboxylic acid exhibit significant plant growth regulating properties, useful in controlling the size, shape, dormancy time, flowering time and/or fruit setting of plants, depending upon the concentrations used. They may also be used to control the growth rate, texture and color of turf grass. Presently preferred compounds include the cis-2,5-dimethylpyrrolidine salt of 1-fluorenecarboxylic acid, 9-cis-2,5-dimethyl-1-pyrrolidinyl-2-chlorofluorene-9-carboxylic acid, methyl ester, the 2,6-dimethylpiperidine salt of 1-fluorenecarboxylic acid, and the cis-2,5-dimethylpyrrolidine salt of 9-hydroxyfluorene-9-carboxylic acid.

Fluorenecarboxylic acid derivatives

A composition consisting essentially of 2-chloroethylphosphonic acid and certain imides, carbamates, or tetrachloroisophthalonitrile, increases the ability of 2-chloroethylphosphonic acid alone to cause the release of ethylene in plant tissue when applied to same.

Increasing chloroethylphosphonic acid-induced ethylene response

A method of improving the yield of plants, particularly crop plants, such as legumes and cotton, by the application to the plants of an effective amount of at least one compound selected from the group consisting of substituted thioureas having the formula: ##EQU1## wherein R and R' are the same or different and are aliphatic hydrocarbon of 1 to 12 carbon atoms and aromatic hydrocarbon up to 12 carbon atoms.

Growing community of inventors

Painesville, OH, United States of America

Han San Ku