| 摘要 |
Use of heterocyclic cpds. of formula (I) or their salts as safeners for preventing or reducing phytotoxic effects of plant protection agents on crop plants is new: W1 = N or CR*; W1 = O, S, NH, NR**, N=N, N=CR* or CR*=N, provided that W1 and W2 contain a total of 2-3 ring heteroatoms; A = a 1-12C hydrocarbon gp.; B1,B2 = COOH opt. functionalised as an ester, thioester, nitrile, imide,etc., or COR; R = an aliphatic, araliphatic or aromatic gp. which opt. bears other functional gps. and contains a total of up to 24 C atoms; n = 0 or 1; R* = H, halo, 1-8C haloalkyl,etc.;R** = 1-8C alkyl, 1-8C haloalkyl, 1-8C alkylthio, 1-8C alkoxy, 1-8C haloalkoxy, 1-8C alkylsulphonyl,etc.. |
