Effect of Extended Diapause on Evolution of Resistance to Transgenic Bacillus thuringiensis Corn by Northern Corn Rootworm (Coleoptera: Chrysomelidae)

2005 ◽  
Vol 98 (6) ◽  
pp. 2220-2234 ◽  
Author(s):  
P. D. Mitchell ◽  
D. W. Onstad
Keyword(s):  
Bacillus Thuringiensis ◽  
Corn Rootworm ◽  
Evolution Of Resistance ◽  
Northern Corn Rootworm

scholarly journals Susceptibility of northern corn rootworm Diabrotica barberi (Coleoptera: Chrysomelidae) to mCry3A and eCry3.1Ab Bacillus thuringiensis proteins

2015 ◽  
Vol 23 (6) ◽  
pp. 913-917 ◽  
Author(s):  
Isaac O. Oyediran ◽  
Phillip Matthews ◽  
Narendra Palekar ◽  
Wade French ◽  
Jared Conville ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Corn Rootworm ◽  
Diabrotica Barberi ◽  
Northern Corn Rootworm

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 Development of a nondiapausing strain of northern corn rootworm with rearing techniques for both diapausing and nondiapausing strains

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Man P. Huynh ◽  
Chad Nielson ◽  
B. Wade French ◽  
Dalton C. Ludwick ◽  
Ryan W. Geisert ◽  
...  
Keyword(s):  
Selective Breeding ◽  
Cold Treatment ◽  
Adult Emergence ◽  
Corn Rootworm ◽  
Improved Method ◽  
Egg Hatch ◽  
Diabrotica Barberi ◽  
Laboratory Rearing ◽  
Rearing Techniques ◽  
Northern Corn Rootworm

AbstractThe northern corn rootworm, Diabrotica barberi Smith & Lawrence, has a univoltine life cycle that typically produces one generation a year. When rearing the northern corn rootworm in the laboratory, in order to break diapause, it is necessary to expose eggs to a five month cold period before raising the temperature. By selective breeding of the small fraction of eggs that hatched without cold within 19–32 days post oviposition, we were able to develop a non-diapausing colony of the northern corn rootworm within five generations of selection. Through selection, the percentages of adult emergence from egg hatch without exposure to cold treatment significantly increased from 0.52% ± 0.07 at generation zero to 29.0% ± 2.47 at generation eight. During this process, we developed an improved method for laboratory rearing of both the newly developed non-diapausing strain as well as the diapausing strain. The development of the non-diapausing colony along with the improvements to the rearing system will allow researchers to produce up to six generations of the northern corn rootworm per year, which would facilitate research and advance our knowledge of this pest at an accelerated rate.

scholarly journals Bacillus thuringiensis and Its Pesticidal Crystal Proteins

1998 ◽  
Vol 62 (3) ◽  
pp. 775-806 ◽  
Author(s):  
E. Schnepf ◽  
N. Crickmore ◽  
J. Van Rie ◽  
D. Lereclus ◽  
J. Baum ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Integrated Management ◽  
Management Strategies ◽  
Resistance Mechanisms ◽  
Maximum Efficiency ◽  
Crystal Proteins ◽  
Evolution Of Resistance ◽  
Complex Relationships ◽  
Bacterium Bacillus ◽  
Natural Settings

SUMMARY During the past decade the pesticidal bacterium Bacillus thuringiensis has been the subject of intensive research. These efforts have yielded considerable data about the complex relationships between the structure, mechanism of action, and genetics of the organism’s pesticidal crystal proteins, and a coherent picture of these relationships is beginning to emerge. Other studies have focused on the ecological role of the B. thuringiensis crystal proteins, their performance in agricultural and other natural settings, and the evolution of resistance mechanisms in target pests. Armed with this knowledge base and with the tools of modern biotechnology, researchers are now reporting promising results in engineering more-useful toxins and formulations, in creating transgenic plants that express pesticidal activity, and in constructing integrated management strategies to insure that these products are utilized with maximum efficiency and benefit.

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