Title: Method of retarding the growth of plants using certain oxadiazolyl, oxazolyl or thiadiazolyl benzoic acid derivatives

Abstract: Plant growth regulant effects, such as dwarfing, cessation of terminal growth, increased flower set, increased fruit and pod set, fruiting body abortion, twisting and epinastic responses, etc., may be accomplished on crops such as soybeans, cotton, etc., by application of certain 2-(1,3,4-oxadiazol-2-yl) or 2-(2-oxazolyl) or 2-(1,3,4-thiadiazol-2-yl)benzoic acids, salts and esters, having the formula ##STR1## where X is nitrogen or C--R" (R" being hydrogen or methyl), Z is oxygen or sulfur when X is nitrogen, Z is oxygen and when X is C--R", R is phenyl or various substituents, and R' is hydrogen or various substituents. An example is 2-(5-phenyl-1,3,4-oxadiazol-2-yl)benzoic acid. The compounds where X is nitrogen and Z is sulfur are new compounds, e.g., 2-(5-phenyl-1,3,4-thiadiazol-2-yl)benzoic acid.

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Inventors: Brouwer, Walter G. (Guelph, CA, US)
MacPherson, Edwin J. (Elmira, CA, US)
Ames, Ronald B. (Naugatuck, CT, US)
Neidermyer, Robert W. (Cheshire, CT, US)
Crittendon, Charles E. (Cheshire, CT, US)

Application Number: 648237
Filing Date: 1976-01-12
Publication_date: 1977-07-12
Assignee: Uniroyal Inc. (New York, NY); Uniroyal, Ltd. (CA)
Primary Class(es): 504/177 504/179, 504/180
Other Classes:
US Patent Ref:

3844761	Oct, 1974	Newallis et al.	71/76.
3868244	Feb, 1975	Taylor et al.	71/76.
3882138	May, 1975	Brouwer et al.	71/80.
3947263	Mar, 1976	Brouwer et al.	71/90.

Other Refs:
Primary Examiner: Hollrah, Glennon H.
Assistant Examiner:
Attorney: Long; James J.