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

Table 3

Rate of S. cerealella death, of emergence, of number of rice attacked (), and of weight loss () provoked by P. quadrifolia essential oil in contact method.

Dose (μL mL^−1)	Mortality	Emerged	(%)	(%)
0	10.82 ± 0.17^d	89.62 ± 0.01^a	25.44 ± 0.93^b	24.31 ± 0.28^b
3	57.96 ± 0.05^c	2.10 ± 0.04^b	0.61 ± 0.05^c	0.01 ± 0.00^c
5	70.38 ± 0.00^bc	1.62 ± 0.08^b	0.48 ± 0.05^c	0.05 ± 0.02^c
10	76.75 ± 0.12^ab	1.28 ± 0.05^b	0.35 ± 0.04^c	0.04 ± 0.03^c
15	88.85 ± 0.17^a	0.13 ± 0.10^c	0.07 ± 0.01^c	0.04 ± 0.01^c
Probability	<0.001	<0.001	<0.001	<0.001
CV (%)	14.21	7.51	7.90	6.02

0: ethanol treatment (control); very highly significant difference (0.1%).
The averages followed by the same letter were not significantly different at the beginning of 5%.