Table 2. Factors associated with membership of a community in a cluster of high T. infestans infestation in the Moreno Department, Santiago del Estero, Argentina.

	Variables analyzed1									Model fit
Model	Den	Dist	LST	NDVI	Elev	Deg	Def	Crops	Constant	?2	Δi 2	ωi
1	+X**	—	+X**	+X**	−X**	+X*	+X*	−X*	−X	154**	0.0	0.68
2	+X**	−XNS	+X**	+X**	−X**	+X*	+X*	−X**	−X	154**	2.1	0.25
3	+X**	—	+X**	+X**	−X**	—	—	−X*	−X	144**	6.1	0.03
4	+X**	—	+X**	+X*	−X**	+X	—	−X*	−X	146**	6.3	0.03
6	+X**	—	—	+X**	−X**	+X**	+X**	−X**	+X**	143**	9.1	0.01
5	+X**	—	+X*	—	−X**	+X**	+X**	−X*	−X	131**	20.1	2.90E-05
7	+X**	—	+X*	+X*	−X**	+X**	+X*	—	−X*	123**	28.9	3.60E-07
8	—	—	+X**	+X*	−X**	+X**	+X**	−X*	−X*	106**	46.0	1.00E-10
9	—	—	+X**	+X*	−X**	—	+XNS	−X*	−X**	82**	67.2	2.60E-15
10	+X**	—	+X**	+X*	—	+XNS	+XNS	−XNS	−X**	97**	55.1	7.30E-13
Σ ωi(j)	1.00	0.25	0.99	0.99	0.99	0.94	0.96	0.99

¹Variables: Den, density of rural houses (# per sq. km); Dist, distance from a community to the nearest T. infestans infested community (meters); LST, mean maximum land surface temperature (°C); NDVI, Normalized Difference Vegetation Index (no units); Elev, mean elevation of each community (meters above sea level); Deg, percentage of landscape within 2 km of a village that was degraded (see text for details); Def, percentage of landscape within 2 km of a community that was deforested (see text for details); Crops, percentage of landscape within 2 km of a village that was modified for soy production.

Symbols: X (variable tested in model); — (variable not tested in model); − (negative association) + (positive association);

^**(P≤0,01);

^*(0,01<P≤0,05); NS (not significant).

Δ_i = AIC_i−AIC_min.

ω_i = exp (−1/2 Δ_i)/Σ exp (−1/2 Δ_i).

Σ ω_i(j): sum of ω_i values from every model in which variable i was present. Indicates the relative importance of each independent variable in predicting the data.

²Lowest AIC = 60.8.