Helena Prosen

*University of Ljubljana, Faculty of Chemistry and Chemical Technology, Ljubljana Slovenia* 

### **1. Introduction**

42 Herbicides – Properties, Synthesis and Control of Weeds

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3*H*-phenoxazin-3-one derivatives as products of 2-hydroxy-1,4-benzoxazin-3-one (HBOA) biotransformation by *Chaetosphaeria sp*., an endophytic fungus from Triazine herbicides belong to the group of the most widely used herbicides worldwide. In this review paper, encompassing mostly the relevant research and publications done in the last decade, the fate of triazine herbicides after their introduction in the environment will be discussed. They are transformed in a variety of transformation products after their application, and some of these products are at least as important for the assessment of the overall fate of triazine herbicides and their impact on the environment. Both parent compounds and transformation products will be discussed with particular emphasis on their behaviour in the soil. Analytical methods for the determination of their residues and transformation products in the soil will be reviewed along with the consideration of the impact of the current analytical approaches on our knowledge about the fate of triazines.
