Characterization and Antifungal Activity of Limonoid Constituents Isolated from Meliaceae Plants Melia dubia, Aphanamixis polystachya, and Swietenia macrophylla against Plant Pathogenic Fungi In Vitro

Table 1

Control value (%) of limonoids 1, 4, 5, 7, and 9 against Fusarium oxysporum, Magnaporthe oryzae, and Sclerotium rolfsii.

Fungi	Conc. (µg/mL)	Control value (%)
		1^b	4	5	7	9
FO^a	250	11.73 ± 7.64^c	28.67 ± 2.38	18.51^d	nt	nt
	500	25.03 ± 5.93	30.63 ± 0.58	22.43	nt	nt
MG	250	13.84 ± 5.97	24.89 ± 0.69	25.67	6.60	14.15
	500	27.67 ± 3.14	33.33 ± 0.42	28.61	16.04	66.04
SR	250	Nt	nt	nt	nt	nt
	500	Nt	nt	nt	nt	nt

^aFO : Fusarium oxysporum, MG : Magnaporthe oryzae, and SR : Sclerotium rolfsii. ^bCompounds: 1, dysobinin; 4, chisocheton compound E; 5, 6α-acetoxyepoxyazadiradione VI; 7, khayanone; 9, 6-acetoxy-methyl angolensate. ^cThe values are the average of two determinations ± standard error of the mean. nt: not tested. ^dValues are obtained through a single treatment.