| 摘要 |
This invention relates to the use of hydroxylamine derivatives of general formula (I), wherein R1 represents phenyl, N-heteroaryl, S-heteroaryl or a naphthyl group any of which may be unsubstituted or substituted, an unsubstituted or substituted phenylamino or alkylamino or lower alkoxy; X represents halo, amino or an unsubstituted or substituted phenylamino group, or amino substituted with one or two lower alkyl or a hydroxy group, provided that if R1 represents unsubstituted or substituted phenylamino, alkylamino or lower alkoxy, then X is not halo; Y represents hydrogen, hydroxy or alkanoyloxy, with the proviso that simultaneously R1 may not represent phenyl, halophenyl, alkoxyphenyl, N-heteroaryl or naphthyl, X may not represent halo, hydroxy or amino and Y may not represent hydrogen or hydroxy; R2 and R3, independently from each other, represent hydrogen or lower alkyl group, provided that R2 and R3 are not hydrogen simultaneously, or R2 and R3 along with the adjacent nitrogen atom form a 5- to 7-membered saturated hetero ring, to increase the tolerance of cultivated plants against weather condition stresses, such as cold, frost and drought.
|
