Chemical Composition and Insecticidal and Repellent Effect of Essential Oils of Two Premna Species against Sitotroga cerealella

Table 4

Percentage (%) of the repellence with olfactometer of the essential oil of the leaves of P. angolensis and P. quadrifolia on adult Sitotroga cerealella.

Dose (%)	Repellency rate (%) (±SD)
	P. angolensis	P. quadrifolia
0.1	67.11 ± 10.95	65.55 ± 12.86
0.5	88 ± 10.95	83.55 ± 9.24
1	96 ± 8.94	91.55 ± 11.58
Mean (±SD)
Repellence class	V	IV