Degradation dynamics and final residue of tebuconazole·SYP-1620 20%SC in rice field were studied by HPLC.The results showed that the half-life of tebuconazole·SYP-1620 was 6.72 to 13.00 days,6.38 to 13.86 days.The final residues of tebuconazole·SYP-1620 in rice was not exc...