Table 2.

ANCOVA results comparing the consumption (mg) between fertilized and control (unfertilized) wheat for the two choice experiments.

Variable	Source	df	F-ratio	p-value
Fresh Consumption (mg)	Treatment	1	30.45	<0.0001*
	Start Mass (mg)	1	7.01	0.02*
Ground Consumption (mg)	Treatment	1	60.08	<0.0001*
	Start Mass (mg)	1	2.00	0.16

Treatment refers to the wheat (fertilized or control). Locust wet start mass was used as a covariate to adjust for size differences among insects. For the fresh wheat experiment we used 12 replicates and 10 grasshoppers per replicate. For the ground treatment we used 26 replicates and 1 grasshopper per replicate.