| 摘要 |
A method of sterilising the male anthers of a plant, which comprises applying to the plant an azetidine derivative which is an acid of the general formula I or a salt and/or an ester, amide, alkylamide, hydrazide or alkylhydrazide thereof: …<CHEM>… in which:… X represents one of the groups CH2, CHR or CR2;… Y represents one of the groups CHR, CR2 or CH.CO2H;… Z represents one of the groups CH2, CHR, CR2 or CH.CO2H;… the or each R independently represents an alkyl, alkenyl or cycloalkyl group or an aryl or aralkyl group optionally substituted on the aryl nucleus by one or more of the same or different substituents selected from halogen atoms, alkyl groups and alkoxy groups;… and one but only one of Y and Z must represent a CH.CO2H group. |
