HOME >> BIOLOGY >> NEWS
Corn Rootworm Changing Behavior, Posing New Threat To Crops

CHAMPAIGN, Ill. -- Crop rotation is failing as a defense against Western corn rootworms in a growing number of Midwest fields. The beetles have adapted, are spreading and pose a threat to corn crops this year, scientists say.

As the major insect pest of corn, rootworms have changed their behavior, laying their eggs in soybean fields instead of corn. The conclusion is that crop rotation itself has selected for a rootworm strain that circumvents crop rotation. By laying their eggs in soybean fields, the female rootworm beetles ensure the survival of their larvae in the subsequent year because the field will be planted with corn.

"Intense selection pressures have produced rootworm beetles that move out of corn to lay at least some of their eggs," said entomologist Joseph Spencer of the Illinois Natural History Survey and the University of Illinois department of natural resources and environmental sciences. "Rootworm beetles are laying their eggs in soybean, alfalfa and other locations."

The first documented case of damage to corn planted after soybeans occurred in 1993 in East Central Illinois. In 1995, nine counties in East Central Illinois and 13 counties in northwestern Indiana reported damage. Sampling in 1997 showed the problem was spreading rapidly to the north and east. Southern counties in Michigan and portions of northwest Ohio also reported the beetles' presence last year. The problem does not exist or is minimal west of the Illinois River and in the southern third of Illinois.

The logical conclusion is that the problem eventually will spread to the Atlantic coast. "Given what we know about prevailing winds and storm patterns, it's only a matter of time before this rootworm adaption ends up as far east as Delaware," said Scott Isard, a U. of I. geography professor.

Given the amount of first-year corn acreage in Illinois, it would cost farmers $100 million per year to control rootworms chemically if the corn-soyb
'"/>

Contact: Gary Beaumont
g-beaumont@uiuc.edu
217-333-9440
University of Illinois at Urbana-Champaign
6-Feb-1998


Page: 1 2

Related biology news :

1. From Corn Rootworms To Art, Cornells Reactor Is At The Core
2. Changing one gene launches new fly species
3. Changing the face of biology
4. Changing focus of traditional hospital rounds improves patient care
5. Changing global nitrogen cycle impacting human health, says Colorado University-led study
6. Changing fish body shapes give clues to environmental factors
7. Relationships in a Changing World -- call for papers
8. Changing colors in mice
9. Changing childrens diets today could reduce bone problems 70 years from now
10. If You Cant Stop Polluting, Try Changing The Weather Instead
11. USGS Finds Sea Otters At Risk From Killer Whales In A Changing Ocean

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: