Table 1. CLIMEX parameter values used for Thaumetopoea pityocampa. Parameter mnemonics are taken from Sutherst et al. (2007b).

Index	Parameter	Valuea
Temperature	DV0 = lower threshold	5.6°C
	DV1 = lower optimum temperature	18.0°C
	DV2 = upper optimum temperature	25.0°C
	DV3 = upper threshold	30.0°C
Moisture	SM0 = lower soil moisture threshold	0.25
	SM1 = lower optimum soil moisture	0.40
	SM2 = upper optimum soil moisture	0.80
	SM3 = upper soil moisture threshold	2.00
Cold stress	TTCS = temperature threshold	−4°C
	THCS = stress accumulation rate	−0.05 Week−1
	DTCS = degree day threshold	17.0°C Days
	DHCS = stress accumulation rate	−0.00025 Week−1
Heat stress	TTHS = temperature threshold	32.0°C
	THHS = stress accumulation rate	0.005 Week−1
Dry stress	SMDS = threshold soil moisture	0.2
	HDS = stress accumulation rate	−0.005 Week−1
Generations	PDD = degree-day thresholdb	600°C Days

^aValues without units are dimensionless indices of a 100 mm single bucket soil moisture profile.

^bMinimum annual total number of degree-days above DV0 needed for population persistence.