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

Table 1

Antimicrobial activity of water-extracted plant extracts on the growth of the fungal pathogens.

Test material	Growth of fungal isolates
	Alternaria solani				Phytophthora infestans
	Day 1	Day 3	Day 5	Day 7	Day 1	Day 3	Day 5	Day 7
Control	3.59^a	20.08^a	41.92^a	61.67^a	6.00^a	27.25^a	45.25^a	64.42^a
Marigold	3.67^a	19.00^b	37.25^b	56.17^b	3.42^b	18.59^b	37.67^b	56.17^b
Tick berry	2.92^ab	17.00^c	34.75^c	51.00^c	4.00^b	18.34^b	36.33^c	54.50^c
Ginger	2.42^b	16.25^c	33.42^d	47.75^d	3.25^b	16.75^c	31.92^d	49.83^d
Garlic	1.75^c	16.84^c	31.59^e	45.17^e	2.17^c	14.75^d	28.25^e	37.67^e
Ridomil	0.00^d	0.00^d	0.00^f	0.00^f	0.00^d	0.00^e	0.00^f	0.00^f
P > F	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
SE	0.212	0.255	0.400	0.414	0.335	0.358	0.315	0.433
DF	5	5	5	5	5	5	5	5

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