Table 4. Quantities of ethyl pentanoate and ethyl hexanoate tested and E. fetida responses to each.

Molecules	Quantity	Attraction	p-value
Ethyl pentanoate	1 µl	◊	0.032
	10 µl	◊	0.006
	100 µl	◊	<0.001
	1000 µl	◊	<0.001
Ethyl hexanoate	1 µl	◊	0.030
	10 µl	-	0.67
	100 µl	◊	<0.001
	1000 µl	◊	<0.001

- = no attraction, ◊ = earthworm attraction.

Note: Although p-values at 1 µl for both esters are significant (and in each case earthworms were overrepresented in the treatment arm relative to expectations based on a random distribution) attraction to the treatment arm was not significantly different than to at least one adjacent control arm. Instead earthworms were significantly underrepresented in the most distant control arm. This result is consistent with weak attraction to this low concentration of the target compound.