In Vitro Control of Phytophthora infestans and Alternaria solani Using Crude Extracts and Essential Oils from Selected Plants

Table 5

Effect of the extraction solvents and essential oils on the growth of the test pathogens.

Extraction method	Growth of fungal isolates
	Alternaria solani				Phytophthora infestans
	Day 1	Day 3	Day 5	Day 7	Day 1	Day 3	Day 5	Day 7
Water	2.39^b	14.86^b	29.82^a	43.62^a	3.14^a	15.94^b	29.90^b	43.76^a
Methanol	2.64^b	15.78^a	29.71^a	41.68^b	2.99^a	18.18^a	33.18^a	44.04^a
Ethanol	3.29^a	15.00^b	27.07^b	39.19^c	2.53^b	13.28^c	28.43^c	40.15^b
Essential oils	1.57^c	7.12^c	14.71^c	21.10^d	1.31^c	7.49^d	15.69^d	21.04^c
Pr > F	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001

Mean values followed by the same letter within the same column are not significantly different at .