Western Corn Rootworm
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Western Corn Rootworm
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Author : Stefan Vidal
language : en
Publisher: CABI
Release Date : 2005
Western Corn Rootworm written by Stefan Vidal and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
Western Corn Rootworm, Diabrotica virgifera virgifera LeConte, has been a major economic pest of maize in the Americas for many years. However, since the early 1990's it has become an increasing threat to crops in Europe and is expected to spread to all maize growing areas of the continent. This book provides a comprehensive review of current knowledge of the biology and ecology of this insect pest and how it might be managed in order to limit its damage as it spreads into new agroecological areas. Cultural, biotechnical, and biological control measures are addressed, as are ecological baseline data such as population dynamics, economic thresholds and aspects of its behaviour. The book also examines the potential of plant protection techniques currently used in North America to be applied in Europe.
Laboratory Rearing Of Western Corn Rootworms And Hybridization Of The Western Corn Rootworm Diabrotica Virgifera And Northern Corn Rootworm D Longicornis Coleoptera Chrysomelidae
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Author : Ada Mae Hintz
language : en
Publisher:
Release Date : 1965
Laboratory Rearing Of Western Corn Rootworms And Hybridization Of The Western Corn Rootworm Diabrotica Virgifera And Northern Corn Rootworm D Longicornis Coleoptera Chrysomelidae written by Ada Mae Hintz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Chrysomelidae categories.
The Western Corn Rootworm
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Author : Francis Marion Webster
language : en
Publisher:
Release Date : 1913
The Western Corn Rootworm written by Francis Marion Webster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1913 with Corn categories.
Relationship Between Western Corn Rootworm Development And Corn Plant Growth
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Author : Julianne Stavisky
language : en
Publisher:
Release Date : 1996
Relationship Between Western Corn Rootworm Development And Corn Plant Growth written by Julianne Stavisky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Western Corn Rootworm
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Author :
language : en
Publisher:
Release Date : 1997
Western Corn Rootworm written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Corn categories.
Western Corn Rootworm
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Author : Frank B. Peairs
language : en
Publisher:
Release Date : 2010
Western Corn Rootworm written by Frank B. Peairs and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Corn categories.
Impact Of Northern And Western Corn Rootworm Larvae On Field Corn
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Author :
language : en
Publisher:
Release Date : 1977
Impact Of Northern And Western Corn Rootworm Larvae On Field Corn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Corn categories.
Resistance Management Of The Western Corn Rootworm Diabrotica Virgifera Virgifera
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Author : Sarah N. Zukoff
language : en
Publisher:
Release Date : 2013
Resistance Management Of The Western Corn Rootworm Diabrotica Virgifera Virgifera written by Sarah N. Zukoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Corn categories.
The Environmental Protection Agency recently registered seed blend refuges for two of the transgenic Bt corn products targeting the western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte. Larval movement between Bt and isoline plants can be detrimental to resistance management for high dose Bt products because the insect larvae will potentially be exposed to sublethal amounts of the Bt, however, the effect of this movement on low to moderate dose products is unknown. All current rootworm products are low dose. The main criteria for whether movement by WCR larvae between isoline and Bt corn plants will influence the development of resistance is whether or not selection for resistance is taking place. We found that movement between isoline and SmartStax[registered trademark] hybrid plants did occur in seed blend scenarios in our field study. The majority of plant damage to the SmartStax plants occurred when the larvae moved from surrounding infested isoline plants moved late in their development. These older, larger larvae are all able to tolerate the Bt in the plants, therefore resistance will likely not develop in these larvae. In a similar experiment, movement also occurred between Agrisure® Duracad[trademark] and isoline plants in seed blend scenarios, however the damage was low for all treatments. With isoline plants being mixed with Bt plants in seed blend refuges, host recognition behavior of the western corn rootworm on Bt and isoline plants is also important to understand. There were no differences between the host recognition behavior of WCR larvae after exposure to mCry3A, Cry3Bb1, Cry34/35Ab1, or their isoline corn hybrids, therefore all hybrids were perceived as hosts by WCR larvae. With all the hybrids on the currently registered being pyramided by different companies to control rootworms, the potential for cross resistance between these hybrids was evaluated using field resistant and susceptible populations. Based on the data from laboratory and greenhouse assays, the potential for cross resistance between mCry3A and Cry3Bb1 might be likely, but not between these hybrids and Cry34/35Ab1. Information gathered in this study provides important behavioral information on western corn rootworms that will aid in making decisions involving Bt corn hybrids.
Partial Characterization Of Bt Resistance And The Bacteriome Of Western Corn Rootworm
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Author : Dalton C. Ludwick
language : en
Publisher:
Release Date : 2018
Partial Characterization Of Bt Resistance And The Bacteriome Of Western Corn Rootworm written by Dalton C. Ludwick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Western corn rootworm (Diabrotica virgifera virgifera LeConte) has been a pest of corn (Zea mays L.) for more than one century. In that time, this insect has spread across the United States and has also had several introductions into Europe. Though corn growers have applied a number of control tactics over the years, including crop rotation, synthetic insecticides, and transgenic corn, this insect is persistently an issue for much of the corn growing areas in the United States and Europe. Western corn rootworm is infamous for its ability to overcome the tactics that are used against it, several times within a single decade. Transgenic corn expressing one or more protein(s) from Bacillus thuringiensis Berliner (Bt) have been used against this insect for more than one decade. Western corn rootworm had developed resistance to three of the four proteins (Cry3Bb1, mCry3A, and eCry3.1Ab) and had been documented before the start of this dissertation. Immediately prior to the start of this dissertation, information existed that resistance to the fourth protein (Cry34/35Ab1) may have occurred in a Minnesota population. In this dissertation, we placed insects from control colonies or the field population in containers with corn expressing the Cry34/35Ab1 protein or in containers with artificial diet covered by the protein. The results of these three experiments indicated that incomplete resistance to Cry34/35Ab1 and Cry3Bb1 had occurred. The artificial diets used in the first experiment are proprietary and owned by separate companies. Efforts in separate studies led to the formulation of an improved artificial for western corn rootworm larvae which is now available to the public. This single, artificial diet was tested for its ability to detect resistance to the different proteins currently targeting western corn rootworm. Laboratory colonies of insects selected for resistance to each protein were compared to susceptible insects on the new diet for their ability to survive and develop. The proprietary diets were also used to make comparisons about the similarity of the diets to the new, public diet. The new diet performed similarly to proprietary diets in terms of mortality and developmental rates. Indeed, the new diet was able to detect resistance to all proteins and documented strong differences between Cry34/35Ab1-resistant insects and susceptible insects for the first time. Lastly, we investigated which bacteria were associated with this insect. Laboratory insects were raised in two geographically and microbially distinct soils on non-Bt corn. Insects were collected at different time points to understand which bacteria were present in each life stage and across all life stages. Bacteria in soil samples were also identified and compared to those found in the insect to determine which bacteria were unique to the insect. These results suggest that 16 different bacteria are found in every western corn rootworm, some of which appear to only occur in the insect. The knowledge of bacteria associated with western corn rootworm may one day help us better understand the mechanisms of Bt resistance and how to better optimize nutrition.
The Western Corn Rootworm
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Author : Ulrich Kuhlmann
language : de
Publisher:
Release Date : 2005
The Western Corn Rootworm written by Ulrich Kuhlmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Educational videos categories.
Illustrates the life cycle of the Western Corn Rootworm, a pest that has caused severe yield losses for corn in the United States, and has spread to Europe. Uses a combination of macro sequences and 3D animations to show how it hatches into larvae in late spring, grow into pupae, and mature into adult beetles that feed on maize foliage, pollen and silks.