Table 3.

The independent effects of concentration, body weight and sex on mortality for each monoterpene tested with MPB from cohort 1.

Cohort 1
Monoterpene		Concentration	Weight	Sex
(−)-Limonene	Coefficient (±S.E.)	0.018 ± 0.004	−0.38 ± 0.12	−0.05 ± 0.48
	P	8.75e-07*	0.001*	0.915
(+)-Limonene	Coefficient (±S.E.)	0.018 ± 0.004	−0.23 ± 0.15	0.52 ± 0.59
	P	1.21e-06*	0.115	0.379
(+)-3-Carene	Coefficient (±S.E.)	0.016 ± 0.003	−0.54 ± 0.17	−1.22 ± 0.59
	P	5.77e-06*	0.002*	0.039*
Myrcene	Coefficient (±S.E.)	0.012 ± 0.003	−0.40 ± 0.14	0.78 ± 0.54
	P	2.95e-06*	0.005*	0.148
(+)-α-Pinene	Coefficient (±S.E.)	0.019 ± 0.004	−0.46 ± 0.21	0.30 ± 0.73
	P	5.61e-06*	0.030*	0.680
(−)-β-Pinene	Coefficient (±S.E.)	0.013 ± 0.003	−0.84 ± 0.23	−1.35 ± 0.67
	P	9.79e-07*	<0.001*	0.046*
(−)-α-Pinene	Coefficient (±S.E.)	0.005 ± 0.001	−0.10 ± 0.11	0.26 ± 0.47
	P	5.11e-05*	0.360	0.579
Terpinolene	Coefficient (±S.E.)	0.004 ± 0.001	−0.52 ± 0.17	0.26 ± 0.53
	P	0.00436*	0.002*	0.625

Logistic regression analysis was used to assess the effects of monoterpene concentration, body weight, and sex on mortality for each of the monoterpenes tested. The coefficient indicates the magnitude and direction of each of these effects on mortality. Concentration: A positive coefficient indicates a positive relationship between increasing concentration and mortality. A significant positive coefficient was found for all monoterpenes tested indicating increasing toxicity at increasing concentrations. Weight: A positive coefficient indicates a positive relationship between increasing weight and mortality. Most monoterpenes had a significant negative coefficient, indicating heavier beetles survived more often. Sex: A positive coefficient indicates females survived more often than males. A negative coefficient indicates males survived more often than females. Most monoterpenes did not show a significant coefficient indicating that sex did not influence survival. *Denotes P-value < 0.05.