Field corn is rarely a host plant because pollination is completed prior to arrival of adults. As in this field, we did have a few cased of infestations in late planted corn in 2000. It is too late to treat this field. Applications, if necessary, have to be made at first silk. A follow up application may be necessary if moth numbers remain high and there are still green silks 5 days after the first application.
Detection is difficult.
Adults are night flying and lay single eggs on silk. Pheromone traps, and to a lesser extent blacklight traps, are the best method to detect adult flights. UW-Extension provides equal opportunities in employment and programming, including Title IX requirements. UW-Extension programs are open to all persons without regard to race, color, ethnic background, or economic circumstances. All rights reserved.