The Antibacterial Activity of Chitosan Products Blended with Monoterpenes and Their Biofilms against Plant Pathogenic Bacteria

Table 1

The in vitro antibacterial activity of different molecular weights of chitosan products against A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum and in combination with different concentrations of geraniol and thymol by nutrient agar (NA) dilution technique.

Chitosan; product	Average; MW (kDa)	MIC (mg/L)
		A. tumefaciens			C. fascians			E. carotovora			P. solanacearum
		Ch	Ch + G	Ch + T	Ch	Ch + G	Ch + T	Ch	Ch + G	Ch + T	Ch	Ch + G	Ch + T
Ch1	22	800	275	165	900	300	45	850	250	90	600	290	120
Ch2	32	850	240	150	950	280	40	875	230	50	725	275	110
Ch3	64	875	220	125	1000	170	25	900	210	40	825	250	100
Ch4	127	900	240	100	1075	200	40	925	230	60	875	260	100
Ch5	203	950	250	175	1100	230	50	975	250	60	900	275	90
Ch6	214	975	250	200	1125	240	60	1000	250	75	925	280	50
Ch7	241	1000	250	75	1175	275	40	1025	250	75	950	285	120
Ch8	276	1050	260	200	1200	275	25	1050	260	75	975	300	120
Ch9	300	1100	260	210	1250	280	40	1150	260	85	1050	320	130
Ch10	387	1225	275	225	1350	280	50	1275	280	100	1175	340	130
Ch11	846	1300	500	275	2600	310	80	2100	300	150	1225	375	140

Ch: chitosan; G: geraniol; T: thymol.
MIC is the minimum inhibitory concentration value obtained for each microorganism.