Table 3

	Biochemical reaction
Isolates	Gram’s reaction	Starch Hydrolysis	Oxidase test	Catalase test	Aspargine medium	Xanthomonadin pigment
1	-	+	+	+	+	-
2*	-	+	+	+	-a	+b
3*	-	+	+	+	-a	+b
4*	-	+	+	+	-a	+b
5*	-	+	+	+	-a	+b
6	-	+	+	+	+	-
7	-	+	+	+	+	-
8	-	+	+	+	+	-
9	-	+	+	+	+	-
10*	-	+	+	+	-a	+b
11	-	+	+	+	+	-
12	-	+	+	+	+	-
13	-	+	+	+	+	-
14*	-	+	+	+	-a	+b
15	-	+	+	+	+	-
16	-	+	+	+	+	-
17	-	+	+	+	+	-
18	-	+	+	+	+	-
19	-	+	+	+	+	-
20*	-	+	+	+	-a	+b
21	-	+	+	+	+	-
22	-	+	+	+	+	-
23	-	+	+	+	+	-
24	-	+	+	+	+	-
25*	-	+	+	+	-a	+b
26	-	+	+	+	+	-
27	-	+	+	+	+	-
28*	-	+	+	+	-a	+b
29	-	+	+	+	+	-
30	-	+	+	+	+	-
31	-	+	+	+	+	-
32	-	+	+	+	+	-
33*	-	+	+	+	-a	+b
34	-	+	+	+	+	-
35	-	+	+	+	+	-
36	-	+	+	+	+	-

‘+’ indicates positive reaction; ‘-‘ indicates negative reaction: -a indicates isolates failed to grow on Asparagine medium; -b indicates presence of xanthomonadin pigment. ‘*’ indicates typical X. campestris pv. campestris characteristics

Table 3: Identification of isolates X. campestris pv. campestris according to biochemical characteristics.