The field experiment was carried out to analyse the effect of triazole compounds such as triadimefon and hexaconazole on radish (Raphanus sativus L.). Each plants was treated with one litre of aqueous solution containing 20 mg-1 triadimefon (TDM) and 20 mg-1 hexaconazole (HEX) on 23, 35 and 53 days after sowing (DAS) by soil drenching. The plants were harvested on 30, 45 and 60 days after sowing. The determination of growth, pigments and histochemical studies were observed in both the control and treatment plants. Leaves are treated with TDM and HEX showed several variations in the anatomical characteristics. Triazole treated plants increased the photosynthetic pigments, starch, ascorbic acid content and tuber weight during the growth period and decrease the fresh and dry weight of the shoot was observed.

Keywords: Raphanus sativus, Triadimefon, Hexaconazole, Photosynthetic Pigments, Histochemical analysis.