Antifungal potential of cinnamon essential oils against Phytophthora colocasiae causing taro leaf blight

Chemical and Biological Technologies in Agriculture

Table 2 Effect of cinnamon EO against necrosis and sporulation on leaf assay

Treatments	Duration	Leaf necrosis		Sporulation
Concentration mg/ml	Hour	Diameter (mm)	Inhibition¹ %	10³ sporangia/mL	Inhibition¹ %
0.00	72	16.50^a ± 0.79	0.00^e ± 0.00	95.00^a ± 1.29	0.00^e ± 0.00
0.156	72	12.75^b ± 0.85	22.72^d ± 5.17	51.25^b ± 3.06	46.05^d ± 3.22
0.312	72	8.95^c ± 0.49	45.75^c ± 2.99	22.75^c ± 0.85	76.05^c ± 0.89
0.625	72	3.45^d ± 0.33	79.09^b ± 2.01	14.00^d ± 0.91	85.26^b ± 0.96
1.25	²	0.00^e ± 0.00	100^a ± 0.00	0.00^e ± 0.00	100^a ± 0.00
2.50	²	0.00^e ± 0.00	100^a ± 0.00	0.00^e ± 0.00	100^a ± 0.00
5.00	²	0.00^e ± 0.00	100^a ± 0.00	0.00^e ± 0.00	100^a ± 0.00
Hymexazol	²	0.00^e ± 0.00	100^a ± 0.00	0.00^e ± 0.00	100^a ± 0.00

Values indicate means of four replications and dissimilar letters in the same column indicate significantly different based on LSD test (P < 0.05) and ± denotes standard error
¹Inhibition percentage compared with control treatment without cinnamon EO
²Indicates no symptoms