Table 1. Treatments employed in the four-arm olfactometer bioassays.

Experiment	Number of earthworms	Tested substances	Quantity of tested substance	Repetitions
Influence of G. candidum	20	G. candidum filtrate	25 ml	18
Influence of earthworms density	5	G. candidum filtrate	25 ml	18
	10	G. candidum filtrate	25 ml	18
	40	G. candidum filtrate	25 ml	18
	80	G. candidum filtrate	25 ml	18
	160	G. candidum filtrate	25 ml	18
Influence of identified volatile compounds	20	Ethyl acetate	1 ml	10
	20	Ethyl propionate	1 ml	10
	20	Ethyl pentanoate	1 ml	10
	20	Ethyl hexanoate	1 ml	10
	20	3-octanone	1 ml	10
	20	2-methylbutan-1-ol	1 ml	10
	20	3-methylbutna-1-ol	1 ml	10
	20	2-methylpropan-1-ol	1 ml	10