Posted 23 July 2007. PMN Crop News.
Pioneer Agronomists Confirm Captures of Western Bean Cutworm
Early moth captures heaviest across Iowa, southern Nebraska, northwestern Indiana and northern Illinois
Pioneer Hi-Bred International. www.pioneer.com
Des Moines, Iowa (July 10, 2007)--Western bean cutworm (WBC) moth captures are increasing in many states in the Corn Belt and growers should be prepared to begin scouting for WBC eggs. Pioneer Hi-Bred is collaborating with universities to monitor captures of WBC in pheromone traps.
As of July 9, 2007, the following has been reported:
•Iowa - 56 counties reporting moth captures with 26 of those counties reporting more than 50 captures in one trap.
•Illinois - 8 counties reporting captures; highest counts in Bureau County.
•Indiana - 15 northwestern counties reporting captures. La Porte County reported 199 moths in one trap; Newton and Starke counties also reporting moderate pressure.
•Nebraska - Light trap captures at University of Nebraska research stations in Clay Center and Concord reporting very high pressure.
•Wisconsin - 13 counties reporting captures.
•Minnesota - 11 counties reporting captures.
•Missouri - Moth captures in Atchison and Saline counties.
WBC moth flights also are being monitored in Ohio, Kentucky and Michigan, although no captures have been reported.
Adult WBC moths emerge in late June through July, mate and begin laying eggs immediately. The moths lay eggs in masses of five to 200. Eggs will turn purple by the fifth day of development and hatch as larvae one or two days later. Young larvae initially feed on tassels and silks, before moving into corn ears and attacking developing kernels.
Because of the labor intensive nature of scouting, the critical timing needed for insecticide applications and the possibility that multiple treatments may be necessary, insecticides may not be an economical or effective solution to the WBC problem.
Fields planted with in-plant control of WBC with the Herculex® I and Herculex® XTRA insect protection traits have shown to be effective in protecting corn against WBC.
For a current update regarding WBC in your area, contact one of the following Pioneer agronomists: