| 摘要 |
Pollen formation in cereal grain plants is inhibited by application of a 4,5-dicarboxy or 5-carboxamido-4-carboxy (or derivatized carboxy)-1-(3,5-disubstituted-phenyl)pyrazole. <CHEM> Use of the compounds facilitates the production of hybrid seed. wherein R and R<1> independently represent chloro, bromo or C1-C4 alkyl, R<2> is hydroxy, C1-C4 alkoxy, C3-C4 alkenyloxy, C3-C4 alkynyloxy, or a phytologically-acceptable moiety forming a salt of the carboxylic acid; or R<2> and R<3> taken together represent -NH- so as to form an imide; R<3> is NH2, hydroxy, or a phytologically-acceptable moiety forming a salt of the carboxylic acid; provided that R<3> is NH2 when R<2> is alkoxy, alkenyloxy or alkynyloxy and that R<2> and R<3> are the same when R<3> is other than NH2. |
