Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field

2015 ◽  
Vol 108 (4) ◽  
pp. 1986-1993 ◽  
Author(s):  
A. J. Hitchon ◽  
J. L. Smith ◽  
B. W. French ◽  
A. W. Schaafsma
Keyword(s):  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm

scholarly journals Resistance to Bt Corn by Western Corn Rootworm (Coleoptera: Chrysomelidae) in the U.S. Corn Belt

2013 ◽  
Vol 4 (3) ◽  
pp. 1-6 ◽  
Author(s):  
Eileen M. Cullen ◽  
Michael E. Gray ◽  
Aaron J. Gassmann ◽  
Bruce E. Hibbard
Keyword(s):  
Western Corn Rootworm ◽  
Corn Belt ◽  
Bt Corn ◽  
Corn Rootworm ◽  
The U.S

scholarly journals Susceptibility of Nebraska Western Corn Rootworm (Coleoptera: Chrysomelidae) Populations to Bt Corn Events

2015 ◽  
Vol 108 (2) ◽  
pp. 742-751 ◽  
Author(s):  
D. S. Wangila ◽  
A. J. Gassmann ◽  
J. L. Petzold-Maxwell ◽  
B. W. French ◽  
L. J. Meinke
Keyword(s):  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm

scholarly journals Western corn rootworm and Bt corn in Iowa

2013 ◽  
Author(s):  
Aaron J. Gassmann ◽  
Erin W. Hodgson
Keyword(s):  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm

scholarly journals Farmers perspectives on resistance in western corn rootworm to CRW-Bt corn in Midwest USA

2017 ◽  
Vol 9 (3) ◽  
pp. 27-38
Author(s):  
A. Andow David ◽  
J. Wright Robert ◽  
W. Hodgson Erin ◽  
E. Hunt Thomas ◽  
R. Ostlie Kenneth
Keyword(s):  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm

scholarly journals Larval mortality and development for rotation-resistant and rotation-susceptible populations of western corn rootworm on Bt corn

2014 ◽  
Vol 139 (1-2) ◽  
pp. 46-54 ◽  
Author(s):  
N. A. Tinsley ◽  
J. L. Spencer ◽  
R. E. Estes ◽  
J. R. Prasifka ◽  
P. M. Schrader ◽  
...  
Keyword(s):  
Larval Mortality ◽  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm ◽  
Susceptible Populations

scholarly journals Comparing Populations of Western Corn Rootworm (Coleoptera: Chrysomelidae) in Regions With and Without a History of Injury to Cry3 Corn

2020 ◽  
Vol 113 (4) ◽  
pp. 1839-1849
Author(s):  
Coy R St. Clair ◽  
Graham P Head ◽  
Aaron J Gassmann
Keyword(s):  
Management Strategies ◽  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Management Tool ◽  
Bt Corn ◽  
Corn Rootworm ◽  
Root Injury ◽  
Important Pest ◽  
Bacterium Bacillus ◽  
Management Tactics

Abstract Transgenic corn expressing insecticidal proteins derived from the bacterium Bacillus thuringiensis (Bt) is an important pest management tool. Western corn rootworm, Diabrotica virgifera virgifera LeConte, is a key pest of corn in the midwestern United States that has developed field-evolved resistance to all available Bt traits. The first Bt trait to be commercialized for management of rootworm was Cry3Bb1 in 2003, and field-evolved resistance appeared in 2009. In this study, we examined fields in counties where greater-than-expected injury to Cry3 (Cry3Bb1 or mCry3A) corn roots (>1 node) had previously been reported (problem counties) and counties where injury had not been reported (non-problem counties). Four to eight fields were sampled per county in 2015, 2016, and 2017 to quantify rootworm abundance, root injury, Cry3Bb1resistance, and rootworm management strategies. Rootworm abundance, root injury, and resistance to Cry3Bb1 did not differ between county types. Management tactics differed between county types, with problem counties growing more corn, using more soil insecticide, and growing more Cry34/35Ab1 corn. Additionally, a comparison of root injury to Bt and non-Bt corn within fields indicated that farmers derived an economic benefit from planting Bt corn to manage corn rootworm. Our results suggest that rootworm populations are similar between problem and non-problem counties in Iowa due to similar levels of selection pressure on Cry3 corn, but problem county fields have applied more management tactics due to previous rootworm issues in the area.

scholarly journals Carbon Isotope Ratios Document That the Elytra of Western Corn Rootworm (Coleoptera: Chrysomelidae) Reflects Adult Versus Larval Feeding and Later Instar Larvae Prefer Bt Corn to Alternate Hosts

2014 ◽  
Vol 43 (3) ◽  
pp. 840-848 ◽  
Author(s):  
Ivan Hiltpold ◽  
John J. Adamczyk ◽  
Matthew L. Higdon ◽  
Thomas L. Clark ◽  
Mark R. Ellersieck ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Ratios ◽  
Western Corn Rootworm ◽  
Bt Corn ◽  
Larval Feeding ◽  
Corn Rootworm ◽  
Alternate Hosts ◽  
Carbon Isotope Ratios

scholarly journals Field-Based Assessment of Resistance to Bt Corn by Western Corn Rootworm (Coleoptera: Chrysomelidae)

2016 ◽  
Vol 109 (3) ◽  
pp. 1399-1409 ◽  
Author(s):  
Ram B. Shrestha ◽  
Siva R. K. Jakka ◽  
B. Wade French ◽  
Aaron J. Gassmann
Keyword(s):  
Western Corn Rootworm ◽  
Bt Corn ◽  
Corn Rootworm
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