Table 3.

Antagonistic activity (halo size) of secondary metabolite (crude extract) of D. helianthi with pathogenic bacteria

Bacteria	Halo size (cm)	Control 1	Control 2	Control 3
E. hirae	0.75±0.07 b	4.00±0.00 a	0.00±0.00 c	0.00±0.00 c
S. typhi	0.98±0.11 b	3.79±0.07 a	0.00±0.00 c	0.00±0.00 c
S. aureus	0.83±0.14 b	3.63±0.13 a	0.00±0.00 c	0.00±0.00 c
E. coli	1.07±0.05 b	3.17±0.14 a	0.00±0.00 c	0.00±0.00 c
M. luteus	0.72±0.02 b	3.92±0.07 a	0.00±0.00 c	0.00±0.00 c
Xanthomonas sp	0.77±0.03 b	4.00±0.00 a	0.00±0.00 c	0.00±0.00 c
Control: 1 – Antibiotic; 2 - Methanol; 3 – Water.

Means followed by same letter on the line do not differ among themselves by Tukey’s test (p>0.05)