Table 2 Corrected survival (± SE) of western corn rootworm populations assayed on Cry34/35Ab1 maize during 2020.

From: Reduced susceptibility of western corn rootworm (Diabrotica virgifera virgifera LeConte) populations to Cry34/35Ab1-expressing maize in northeast Nebraska

County

Population

Cry34/35Ab1 corrected survival ± SEa

Classification of Cry34/35Ab1 resistance

Cuming

15

0.053 ± 0.04de

Susceptibleb

Colfax

16

0.324 ± 0.07b

Incompletec

Pierce

17

0.217 ± 0.06bc

Incomplete

Stanton

18

0.264 ± 0.06bc

Incomplete

Cuming

19

0.157 ± 0.05cde

Incomplete

Boone

20

0.043 ± 0.03e

Susceptible

Cuming

21

0.265 ± 0.08bc

Incomplete

Cuming

22

0.258 ± 0.07bc

Incomplete

Cuming

23

0.400 ± 0.09b

Incomplete

Boone

24

0.351 ± 0.06b

Incomplete

Platte

25

0.253 ± 0.06bc

Incomplete

Stanton

26

0.200 ± 0.06bcd

Susceptible

Dodge

27

0.000 ± 0.00e

Susceptible

Colfax

28

0.306 ± 0.05b

Incomplete

Saunders

29

0.222 ± 0.07bc

Incomplete

Colfax

30

0.670 ± 0.05a

Incomplete

Susceptible laboratory control

LAB-S

0.046 ± 0.01e

X

  1. aCorrected survival values followed by the same lowercase are not significantly different (p > 0.05); bsusceptible criteria: no difference in survival on Cry34/35Ab1 maize compared to the LAB-S control; cincomplete resistance criteria: (1) significantly greater survival on Cry34/35Ab1 maize compared to the LAB-S control, and (2) within a population, proportional survival and/or larval development was significantly lower on Cry34/35Ab1 maize relative to non-RW Bt maize.
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