Table 1. Two way ANOVA of the effects of “Age" and “Treatment" on pea aphid dropping response.

Source	df	Mean Square	F	Sig.
Age	1	6.41	136.6	P<0.001
Treatment	2	1.44	30.65	P<0.001
Age×Treatment	2	.49	10.50	P<0.001
Error	114	.05

The two age groups were: First-instar nymphs and adults. The three treatments were: A. Two s breath. B. One vibration during breath. C. Two vibrations during breath.