Validation of RNA interference in western corn rootworm Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) adults

2011 ◽  
Vol 68 (4) ◽  
pp. 587-591 ◽  
Author(s):  
Murugesan Rangasamy ◽  
Blair D Siegfried
Keyword(s):  
Rna Interference ◽  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Diabrotica Virgifera Virgifera Leconte

scholarly journals Recent data to the distribution of western corn rootworm (Diabrotica virgifera virgifera LeConte) in Hungary

2000 ◽  
Vol 34 (4) ◽  
pp. 387-392 ◽  
Author(s):  
G. Ripka ◽  
G. Princzinger ◽  
I. Zsellér Hatala ◽  
László Vasas ◽  
B. Tóth ◽  
...  
Keyword(s):  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Diabrotica Virgifera Virgifera Leconte

scholarly journals Inheritance and Fitness Costs of Cry3Bb1 Resistance in Diapausing Field Strains of Western Corn Rootworm (Coleoptera: Chrysomelidae)

2020 ◽  
Vol 113 (6) ◽  
pp. 2873-2882
Author(s):  
Ram B Shrestha ◽  
Aaron J Gassmann
Keyword(s):  
Developmental Rate ◽  
Diabrotica Virgifera Virgifera ◽  
Dry Mass ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Adult Size ◽  
Inheritance Of Resistance ◽  
Diabrotica Virgifera ◽  
Fitness Costs ◽  
Diabrotica Virgifera Virgifera Leconte

Abstract Field-evolved resistance to Cry3Bb1 corn by western corn rootworm, Diabrotica virgifera virgifera LeConte (Colleoptera: Chrysomellidae), has been reported in field populations in Iowa, Illinois, Nebraska, and Minnesota. Inheritance and fitness costs associated with Cry3Bb1 resistance have been determined for non-diapausing laboratory strains of western corn rootworm with either laboratory-selected resistance or field-derived resistance. However, information on inheritance and fitness costs of Cry3Bb1 resistance in the diapausing field populations is lacking. In this study, we determined the inheritance of Cry3Bb1 resistance for four diapausing field strains of western corn rootworm using plant-based bioassays. We also determined the fitness costs for eight diapausing field populations in a greenhouse experiment. We found that Cry3Bb1 resistance was an autosomal trait and that the inheritance of resistance was mostly non-recessive; however, there was some variation in the dominance of Cry3Bb1 resistance. We did not find evidence of fitness costs affecting survival to adulthood, developmental rate, or adult dry mass. However, we did detect a fitness cost affecting adult size. The results of this study will add to the current understanding of field-evolved resistance to Cry3Bb1 corn by western corn rootworm and help in developing better strategies to manage resistance.

scholarly journals Prediction of adult western corn rootworm (Diabrotica virgifera virgifera LeConte) emergence

2013 ◽  
Vol 49 (No. 2) ◽  
pp. 89-97
Author(s):  
T. Středa ◽  
O. Vahala ◽  
H. Středová
Keyword(s):  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Threshold Temperature ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Degree Days ◽  
The Czech Republic ◽  
Sum Of Effective Temperatures ◽  
Effective Temperatures ◽  
Diabrotica Virgifera Virgifera Leconte

The sum of effective temperatures (SET) of adult western corn rootworm (WCR) occurrence was determined based on several criteria. The risk of WCR occurrence was mapped, and the areas of continuous reproduction of WCR in the Czech Republic were identified. The daily soil SET was observed until the initial adult WCR occurrence, and it ranged from 414 degree days (DD) when the lower threshold temperature (LTT) was 12.5°C at 0.02 m depth to 719 DD (LTT of 10°C at a depth of 0.05 m). The daily air SET ranged from 415 DD (LTT 12.5°C at a height of 2 m) to 726 DD (LTT of 10°C at a height of 0.05 m).  

Identification of sensilla involved in taste mediation in adult western corn rootworm (Diabrotica virgifera virgifera LeConte)

1995 ◽  
Vol 21 (3) ◽  
pp. 313-329 ◽  
Author(s):  
Sylwester Chyb ◽  
Herbert Eichenseer ◽  
Benedict Hollister ◽  
Christopher A. Mullin ◽  
James L. Frazier
Keyword(s):  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Diabrotica Virgifera Virgifera Leconte

The Effect of Simulated Solar Radiation on Western Corn Rootworm (Coleoptera: Chrysomelidae) Adults Fed D & C Red # 28, a Photoactive Xanthene Dye1

2002 ◽  
Vol 37 (3) ◽  
pp. 254-258
Author(s):  
Robert F. W. Schroder ◽  
Michael M. Athanas ◽  
Mary J. Camp
Keyword(s):  
Solar Radiation ◽  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Median Lethal Concentration ◽  
Exposure System ◽  
Lethal Time ◽  
Simulated Solar Radiation ◽  
Diabrotica Virgifera Virgifera Leconte

Western corn rootworm, Diabrotica virgifera virgifera LeConte, adults were fed a bitter Hawkesbury watermelon juice bait containing varying concentrations (0.00075–0.1%) of D & C Red # 28, a photoactive xanthene dye. Using a tabletop sunlight exposure system, the insects were irradiated at light intensities of 250–500 W/m2. At 500 W/m2 and 30 min exposure, a median lethal concentration (LC50) was obtained at a dye concentration of 0.00364%. At a dye concentration of 0.75%, the median lethal time (LT50) ranged from 24 min at 250 W/m2, to 15 min at 500 W/m2.

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