Table 3.

Median repellent dose (RD₅₀) of Lavandin flowers and stems aromatic waters and of the synthetic repellent MR-08 against Tribolium confusum adults.

Extracts	RD50 1	RD99 2	Slope 3	Intercept	χ2 (df)	P
Flowers	3.584(1.596–6.076)4	29.300(12.222–2543.698)	2.55 ± 0.30	−1.41 ± 0.20	18.20 (4)	0.001
Stems	3.262(1.814–5.420)4	136.069(38.175–5705.529)	1.45 ± 0.19	−7.37 ± 0.13	7.29 (4)	0.121
MR-08	0.001(0.000–0.003)	0.187(0.038–57.276)	1.08 ± 0.32	2.68 ± 0.69	0.78 (2)	0.678

¹ Concentration of the extract that repels 50% of the exposed insect; ² concentration of the extract that repels 99% of the exposed insect. Data are expressed as μL·cm⁻²; in brackets, the confidence interval; ³ Probit model: PROBIT(p) = Intercept + BX (Covariates X are transformed using the base 10.0 logarithm); (df), degrees of freedom; P, Pearson Goodness-of-Fit Test. ⁴ since p < 0.150, a heterogeneity factor is used in the calculation of confidence limits.