Insecticidal Activity and Chemical Composition of the Morinda lucida Essential Oil against Pulse Beetle Callosobruchus maculatus

Table 2

Insecticidal activity of M. lucida essential oil against C. maculatus.

Test sample	24 h exposure			48 h exposure
	LC50	LC90	𝜒^2a	LC50	LC90	𝜒^2a
M. lucida; essential oil	0.298	0.629	18.3	0.122	0.308	36.4
	(0.251–0.368)	(0.521–0.819)		(0.098–0.147)	(0.265–0.372)
Phostoxin	0.295	0.652	17.9	0.081	0.286	58.6
	(0.245–0.370)	(0.532–0.870)		(0.052–0.106)	(0.241–0.357)
Primo-ban-20	0.393	0.726	12.1	0.126	0.387	41.5
	(0.331–0.495)	(0.596–0.965)		(0.094–0.159)	(0.326–0.484)

Units LC₅₀ (concentration causing 50% mortality) and LC₉₀ (concentration causing 90% mortality) in units of 𝜇g/mL. 95% confidence interval (CI) is shown in parenthesis. Insecticidal activity is considered significantly different when the 95% CI fail to overlap. aChi-square value of Probit model fit, all significant at 𝑃<0.05 level.