Transgenic Bt Corn, Soil Insecticide, and Insecticidal Seed Treatment Effects on Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence, Larval Feeding Injury, and Corn Yield in North Dakota

2017 ◽  
Vol 111 (1) ◽  
pp. 348-360 ◽  
Author(s):  
Veronica Calles-Torrez ◽  
Janet J Knodel ◽  
Mark A Boetel ◽  
Curt D Doetkott ◽  
Kellie K Podliska ◽  
...  
Keyword(s):  
North Dakota ◽  
Seed Treatment ◽  
Treatment Effects ◽  
Bt Corn ◽  
Larval Feeding ◽  
Corn Yield ◽  
Corn Rootworm ◽  
Transgenic Bt Corn

scholarly journals Crop rotation mitigates impacts of corn rootworm resistance to transgenic Bt corn

2020 ◽  
Vol 117 (31) ◽  
pp. 18385-18392
Author(s):  
Yves Carrière ◽  
Zachary Brown ◽  
Serkan Aglasan ◽  
Pierre Dutilleul ◽  
Matthew Carroll ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Diabrotica Virgifera Virgifera ◽  
The United States ◽  
Bt Corn ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Negatively Associated ◽  
Bt Resistance ◽  
Bt Toxins ◽  
Transgenic Bt Corn

Transgenic crops that produce insecticidal proteins fromBacillus thuringiensis(Bt) can suppress pests and reduce insecticide sprays, but their efficacy is reduced when pests evolve resistance. Although farmers plant refuges of non-Bt host plants to delay pest resistance, this tactic has not been sufficient against the western corn rootworm,Diabrotica virgifera virgifera. In the United States, some populations of this devastating pest have rapidly evolved practical resistance to Cry3 toxins and Cry34/35Ab, the only Bt toxins in commercially available corn that kill rootworms. Here, we analyzed data from 2011 to 2016 on Bt corn fields producing Cry3Bb alone that were severely damaged by this pest in 25 crop-reporting districts of Illinois, Iowa, and Minnesota. The annual mean frequency of these problem fields was 29 fields (range 7 to 70) per million acres of Cry3Bb corn in 2011 to 2013, with a cost of $163 to $227 per damaged acre. The frequency of problem fields declined by 92% in 2014 to 2016 relative to 2011 to 2013 and was negatively associated with rotation of corn with soybean. The effectiveness of corn rotation for mitigating Bt resistance problems did not differ significantly between crop-reporting districts with versus without prevalent rotation-resistant rootworm populations. In some analyses, the frequency of problem fields was positively associated with planting of Cry3 corn and negatively associated with planting of Bt corn producing both a Cry3 toxin and Cry34/35Ab. The results highlight the central role of crop rotation for mitigating impacts ofD. v. virgiferaresistance to Bt corn.

scholarly journals Evaluation of Seed Treatment and Soil-Applied Insecticides Against Larval Western and Northern Corn Rootworm, 2020

2020 ◽  
Vol 45 (1) ◽  
Author(s):  
Jordan D Reinders ◽  
Zachary D Rystrom ◽  
Emily E Reinders ◽  
Timothy B Dang ◽  
Lance J Meinke
Keyword(s):  
Seed Treatment ◽  
Corn Rootworm ◽  
Northern 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

Corn rootworm survey in North Dakota and a comparison of two sticky traps

2020 ◽  
Vol 144 (10) ◽  
pp. 897-910
Author(s):  
Veronica Calles‐Torrez ◽  
Mark A. Boetel ◽  
Janet J. Knodel
Keyword(s):  
North Dakota ◽  
Corn Rootworm ◽  
Sticky Traps

scholarly journals Seed Treatment Rates Affect Corn Rootworm Larvae, 2017

2019 ◽  
Vol 44 (1) ◽  
Author(s):  
Bradley L McManus ◽  
Billy W Fuller
Keyword(s):  
Seed Treatment ◽  
Corn Rootworm

Strategies for controlling western corn rootworm (Diabrotica virgifera virgifera)

2005 ◽  
Vol 53 (1) ◽  
pp. 71-79 ◽  
Author(s):  
E. Széll ◽  
I. Zsellér ◽  
G. Ripka ◽  
J. Kiss ◽  
G. Princzinger
Keyword(s):  
Life Cycle ◽  
Seed Treatment ◽  
Large Scale ◽  
Insect Pest ◽  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Non Profit ◽  
Small Plot

Western corn rootworm (WCR) first appeared in Europe near Belgrade airport in 1992. The first adult of this species was found near Mórahalom, in the southern part of Hungary, on 30th June 1995. Small-plot trials were started in Szeged (Cereal Research Non-Profit Co.) and large-scale trials in Mezohegyes (Ménesbirtok Ltd.) in 1996 to elaborate strategies to control this insect pest. To make the work more efficient, eight experts working at different institutions formed a team. At the same time, monitoring was begun on when and where the insect appeared and in what numbers. The experiments were adapted to the life cycle of the species. WCR has one generation per year, laying eggs that overwinter. Larvae begin to hatch in late May to mid-June. Adults emerge by mid-July and survive till early October. They lay eggs in abundance from mid-July to late August.  Trials were conducted to control WCR both with and without chemicals. For adult control pesticides were sprayed from an aircraft or using a field sprayer. Larval control involved seed treatment with insecticide or the use of soil insecticide at planting or at cultivation.

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