An increase in corn rootworm populations has farmers looking for answers. In an effort to provide research-based education about their options, Iowa State University Extension and Outreach is teaming up with field agronomists to offer seven field days across the state, beginning June 29.
Last year, entomologists and field specialists with Iowa State University Extension and Outreach received numerous questions about effective management for corn rootworm as populations have increased the past two years and farmers have experienced enhanced root injury during drought conditions.
Each farm has planted a demonstration showcasing three hybrids (no Bt for corn rootworm, SmartStax, and SmartStax Pro) with and without a soil-applied insecticide.
In addition to ways to prevent corn rootworm, the event will feature scouting tips and advice. Erin Hodgson, professor in entomology and extension specialist in entomology at Iowa State, recommends corn growers dig a few corn roots up in July and August, even if they don't suspect they have a problem with corn rootworm.
"In most growing conditions in Iowa, you're not going to see above-ground signs of stress, because we have such good soils," said Hodgson. "But that doesn't mean corn rootworm isn't present or that it won't be a problem later in the season."
Hodgson said she's looking forward to showcasing a diverse approach to corn rootworm management, including crop rotation, transgenics and the SmartStax products. The best way to control rootworm is through prevention. There will also be a novel management tactic, RNAi, planted at each location.
The demos are open to farmers, crop consultants, agronomists and anyone with an interest in rootworm.
The field days are free to attend, but participants are asked to contact the field agronomist hosting each event to RSVP for food and handouts.
For more information, contact Ashley Dean at 515-447-3766 or adean@iastate.edu; Erin Hodgson at 515-294-2847 or ewh@iastate.edu; or your local field agronomist.
Categories: Iowa, Crops, Corn