Larvicidal effect of compounds isolated from Maerua siamensis (Capparidaceae) against Aedes aegypti (Diptera: Culicidae) larvae

Chemical and Biological Technologies in Agriculture

Table 3 Carboxylesterase activity (nM para phenyl acetate/mg protein/min) and glutathione-s-transferase activity (CDNB product/mg protein/min) of surviving 3rd instar Aedes aegypti after treatment with pure compounds from Maerua siamensis for 24 h

Compounds	Carboxylesterase activity^a	CF^b	Glutathione-s-transferase activity^a	CF^b
Control	0.030 ± 0.002a	–	0.321 ± 0.121f	–
Cappariloside A	0.031 ± 0.001a	0.97	0.204 ± 0.014b	1.57
Cappariloside B	0.029 ± 0.001a	1.03	0.156 ± 0.005a	2.06
Glochidone	0.031 ± 0.001a	0.97	0.282 ± 0.006d	1.14
Lupeol	0.032 ± 0.001b	0.94	0.343 ± 0.023 g	0.94
Chrysoeriol	0.031 ± 0.001a	0.97	0.280 ± 0.009d	1.15
Cinnamic acid	0.029 ± 0.001a	1.03	0.207 ± 0.002c	1.55
3,4-Dimethoxybenzoic acid	0.031 ± 0.001a	0.97	0.291 ± 0.076e	1.10
Vanillin	0.032 ± 0.001b	0.94	0.493 ± 0.289 h	0.65

^aMeans within a column followed by the same letter are not significantly different at the 0.05 level by Tukey’s test
^bCF is a correction factor = (enzyme activity of control)/(enzyme activity of treatment)