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

Table 2

Disease severity on inoculated tomato plants.

Early blight	Treatment	Wk 2	Wk 4	Wk 6	Wk 8	Wk 10
	Control	9.20^a	18.24^a	19.66^a	22.68^a	24.19^a
	Marigold	9.58^a	9.12^b	8.55^b	7.70^b	6.89^b
	Garlic	10.30^a	9.14^b	8.55^b	7.90^b	7.45^b
	Ginger	10.25^a	8.80^b	8.31^b	7.82^b	7.43^b
	Ridomil Gold®	9.49^a	8.69^b	7.75^b	6.85^b	6.44^b
	Pr > F	0.118^NS	<0.0001	<0.0001	<0.0001	<0.001
	SE	0.276	0.462	0.453	0.332	0.287
Late blight	Treatment	Wk 2	Wk 4	Wk 6	Wk 8	Wk 10
	Control	9.87^a	46.36^a	66.38^a	74.80^a	90.56^a
	Marigold	9.75^a	9.10^b	7.14^b	7.00^b	6.62^b
	Garlic	10.14^a	8.85^b	7.88^b	7.30^b	6.99^b
	Ginger	9.82^a	8.91^b	8.50^b	8.38^b	8.18^b
	Ridomil Gold®	10.06^a	8.59^b	6.72^b	6.62^b	6.46^b
	Pr > F	0.903^NS	<0.0001	<0.0001	<0.0001	<0.0001
	SE	0.232	0.754	1.328	0.795	1.080

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