Table 2.

Efficacy of preventive spray formulations in protecting one-seed juniper bolts from attack by Phloeosinus scopulorum neomexicanus bark beetles.

Insecticide	Percent active ingredient	No. One-Seed Juniper Bolts				P value for rejecting^{^z} binomial test p_o that proportion of successes was ≥ to:
Insecticide	Percent active ingredient	Tested	Failures^{^y}	Successes	Percent success	0.90	0.80	0.70
Control	—	24	15	9	37.5%	<0.001	<0.001	<0.001
Bifenthrin	0.03%	22	0	22	100.0%	0.887	—	—
Bifenthrin	0.06%	22	1	21	95.5%	0.691	—	—
Permethrin	0.19%	22	0	22	100.0%	0.887	—	—
Carbaryl	1.00%	23	7	16	69.6%	0.002	0.161	—

↵^zRejection is more accurately described as “failing to accept the null hypothesis, H₀.”
↵^yTreatment failure defined as presence of P. scopulorum neomexicanus galleries in an individual bolt.