Corn Newsletter : 2017-26

  1. Soybean aphids
    Author(s): Andy Michel, Kelley Tilmon

    We have heard reports of growers spotting a few soybean aphids in their fields. Finding aphids at this time of year is consistent in the past—we have seen them arrive later and later. We do have a lot of late-planted soybean that are in R4 or R5 stage soybean. Remember that our economic threshold to treat soybean aphids is a rising population of 250 aphids per plant. But also remember that, at higher growth stages (>R6) the threshold increases dramatically. At this point it is important to note that none of the fields in Ohio have reached treatable levels.

  2. Western bean cutworm adult
    Author(s): Amy Raudenbush, Andy Michel, Kelley Tilmon

    Western bean cutworm (WBCW) populations continue to decrease across monitoring counties in Ohio. A total of 80 traps were monitored in 22 counties. Overall, 370 WBCW adults were captured. The state average also continues to decrease from 9 WBCW (week ending August 4) to 5 WBCW (week ending August 11).

About the C.O.R.N. Newsletter

C.O.R.N. is a summary of crop observations, related information, and appropriate recommendations for Ohio Crop Producers and Industry. C.O.R.N. is produced by the Ohio State University Extension Agronomy Team, State Specialists at The Ohio State University and Ohio Agricultural Research and Development Center. C.O.R.N. Questions are directed to State Specialists, Extension Associates, and Agents associated with Ohio State University Extension and the Ohio Agricultural Research and Development Center at The Ohio State University.