Table 3.

Analysis of variance for survival and corrected survival in plant-based bioassays

		Survival			Corrected survival
Year	Effect	df	F	P	df	F	P
2015	Populationa	1, 35	2.74	0.11	1, 17	29.68	<0.0001
	Corn typed	1, 35	9.54	0.004	-	-	-
	Pop. × Corn type	1, 35	6.61	0.01	-	-	-
2016	Populationb	5, 153	8.59	<0.0001	4, 74	11.95	<0.0001
	Corn type	1, 153	13.74	0.0003	-	-	-
	Pop. × Corn type	5, 153	5.21	0.0002	-	-	-
2017	Populationc	9, 271	17.90	<0.0001	9, 136	25.97	<0.0001
	Corn type	1, 271	60.10	<0.0001	-	-	-
	Pop. × Corn type	9, 271	10.89	<0.0001	-	-	-

^a2015 populations: one control, one problem county field population.

^b2016 populations: two control replicates, one non-problem county field populations, two problem county field populations.

^c2017 populations: four control replicates, four non-problem county field populations, two problem county field populations.

^dCorn type = Cry3Bb1 corn versus non-Bt corn.