Table 1.

Multiple regression equations with factors affecting changes in phoretic varroa mite populations in colonies at two sites (site 1: R² = 56 %; site 2: R² = 63.6 %)

Location	Predictor	Coefficient	t	p
Site 1	y-Intercept	5.52	2.82	0.006
	Frames of adult bees	0.486	2.14	0.036
	Frames of brood	−1.65	4.35	<0.0001
	Infested cells (mites/100 cells)	−3.0	0.24	0.81
	Foragers with mites	87.8	5.64	<0.0001
Site 2	y-Intercept	2.6	0.77	0.45
	Frames of adult bees	0.186	0.86	0.51
	Frames of brood	3.3	1.75	0.16
	Infested cells (mites/100 cells)	0.56	0.21	0.84
	Foragers with mites	116	2.76	0.012

The ‘foragers with mites’ data were entered into the analysis as the mites on incoming and outgoing foragers