Essential Oils as Biocontrol Agents of Early and Late Blight Diseases of Tomato under Greenhouse Conditions

Table 4

Effect of the test pathogens on the leaf number of tomato plants.

Pathogen	Number of leaves
	Wk2	Wk4	Wk6	Wk8	Wk 10
Alternaria solani	8.70^a	10.05^a	13.00^b	14.20^b	16.85^a
Phytophthora infestans	6.25^b	8.30^b	15.30^a	16.20^a	17.00^a
Pr > F	<0.0001	<0.0001	0.000	<0.0001	0.0730^NS
SE	0.149	0.181	0.381	0.297	0.306

Means followed by the same letter within the column are not significantly different at ; Wk: week; SE: standard error; NS: not significant.