Table 1.

Disease index of powdery mildew on winter wheat cultivar Emerick treated with different nitrogen forms (calcium nitrate, ammonium sulfate, calcium cyanamide) at 14, 21, 28 days post-infection (dpi).

Nitrogen fertilization	Powdery mildew (Bgt)
	Disease index
	14 dpi	21 dpi	28 dpi
Calcium nitrate	0a	4.44a	17.78a
Ammonium sulfate	44.44c	60b	88.89b
Calcium cyanamide	15.56b	15.56a	20a

Data represent mean values of three biological replicates ± SE. The different lowercase letters indicate a significant difference at 0.05 probability level according to Tukey multiple comparison test.