We introduced dithiophosphate moieties into the fused heterocyclic compound to prepare the title derivatives and characterized their structures by elemental analysis, 1H NMR, and IR spectral data. We found that these compounds show good fungicidal and herbicidal activities and good plant growth regulation activity. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:607–611, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10198