scholarly journals Male Reproductive Competition and Components of Female Fitness in Relation to Body Size in Northern Corn Rootworm (Coleoptera: Chrysomelidae)

2014 ◽  
Vol 107 (1) ◽  
pp. 279-287 ◽  
Author(s):  
B. Wade French ◽  
Leslie Hammack
Keyword(s):  
Body Size ◽  
Corn Rootworm ◽  
Female Fitness ◽  
Reproductive Competition ◽  
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.

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