Two field experiments were carried out at the Experimental Station of the National Research Centre at Shalkan, Kaluobia Governorate, during the two successive seasons of 2004/2005 and 2005/2006 to study response of two fenugreek cultivarsto foliar application with brassinosteroids. The main results were:
1-The two fenugreek cultivars under study, cv. Giza-2 and cv. Giza-30 were significantly different in growth characters at the different stages of growth and yield and its components, as well as, chemical constituents of seeds (carbohydrates, proteins, and fixed oil percentages) and protein and fixed oil yields "Ton/fed".Moreover, cv. Giza-30 cultivar significantly outweighed cv. Giza-2 in growth characters, yield and its components, carbohydrates; protein and fixed oil percentages as well as protein and fixed oil yields per feddan.
2-Foliar application with different concentrations of brassinosteroides (i.e. control, 50.0, 100.0, 150.0 and 200 mg/l) significantly affected growth characters at 75, 90 and 105 days after sowing, yield and its components, chemical constituents of seeds, protein yield/fed and fixed oil yield/fed. Furthermore, foliar application with 200 mg/l BRS recorded the highest significant values of growth characters, yield and its components, carbohydrate%; protein%; fixed oil% per seeds, as well as protein yield/fed and fixed oil% compared with control, 50.0; 100.0, 150.0 mg/l BRS.
3-With respect of the interaction between fenugreek cultivars and diffeent concentrations of brassinosteroid, the effects were significant on all characters studied except protein% per seeds. Generally, spraying cv. Giza‑30 with 200 mg/l BRS recorded the greatest significant values of growth characters, yield and its components, carbohydrate% and fixed oil% per seeds, protein yield/fed and fixed oil yield/fed.