Table 1.

Average diameters of inhibition zone against Phytophthora infestants of Marjoram essential oil, PAMAM G4.0 and oil/PAMAM G4.0 based on different concentrations: 500, 1000, 2000 and 5000 ppm.

Concentration (ppm)		Diameter of Inhibition Zone (d. mm)
Marjoram Essential Oil	PAMAM G4.0
500	-	6.33 ± 0.33
1000	-	7.50 ± 0.33
2000	-	10.00 ± 0.33
5000	-	12.50 ± 0.50
-	500	6.16 ± 0.34
-	1000	7.50 ± 0.50
-	2000	10.00 ± 0.33
-	5000	12.00 ± 0.50
500	500	9.50 ± 0.50
1000	1000	12.33 ± 0.33
2000	2000	15.00 ± 0.00
5000	5000	18.00 ± 0.50