Western Bean Cutworm moths in area
Workshop: OSU Extension is offering a workshop from 9 a.m. to 3 p.m. Friday, July 20, titled “The Woods In Your Backyard.”
This one-day workshop is for those landowners who have a small section of woods out back that they want to learn more about. Learn which trees and shrubs are ‘good’ and what they are good for, how to attract wildlife, improve the health of the trees, deal with invasive species and more. Part of this program will be outside so attendees will have a hands-on learning time.
This program will be held at Deer Haven Preserve on Liberty Road. For more information or to register, please call our office at 740–833-2030. The deadline for registration is July 13.
Western Bean Cutworm moths: Western Bean Cutworm moths are already being caught in 2012. For the sixth straight year, OSU-Extension and OARDC will be trapping for western bean cutworm (WBC). This is a pest of only corn and dry beans (note: NOT a pest of soybean), and has rapidly expanded its native range in Colorado and western Nebraska across the eastern Great Lakes. Here in Delaware County, our trapping began by June 15 in the past but with the impact the warm spring has had in causing most insects to emerge early, we anticipate WBC to begin flight early as well. Traps were placed today, Friday, and we will be monitoring closely the WBC adult emergence. This is critical in knowing when and where to scout for corn.
Our trap counts will be updated weekly on our Agronomic Crops Insects website, entomology.osu.edu/ag. If you are interested in doing some of your own trapping, traps can be easily constructed from milk jugs, or using commercial “bucket-traps.” These traps use pheromone lures, which are relatively inexpensive. Lures cost about $2 and are good for about four weeks, so over the course of four months, the total for lures is $8. Both traps and lures can be purchased from Great Lakes IPM (greatlakesipm.com). For more information, see our WBC fact sheet at ohioline.osu.edu/ent-fact/pdf/0040.pdf.
What do we expect to see this year? According to Ron Hammond, OSU Extension specialist/Entomology, while Ohio has not yet seen economic damage in corn from WBC, Michigan and Ontario reported heavy damage last year. Our total counts increased last year, and we have noticed egg deposition in northwest Ohio for the past two years, so there is risk of damage from WBC. However, the good start to the planting season may limit some of the potential damage. WBC prefers to oviposit in corn that has not tasseled. Despite the anticipated early emergence, if most of the corn has tasseled before peak flight, then feeding and damage will be minimal. Trapping and scouting remains our best option to determine the impact of WBC.
Rob Leeds is an OSU Extension educator.