Figure 1. Are these symptoms due to white mold, brown stem rot or sudden death syndrome of soybean? Actual cause: white mold!
Soybean Disease ID Field Day
Tuesday, September 12 @ 10:30 am (CST) | Brookings, SD
On September 12, SDSU Extension will hold a soybean disease ID field day to help growers, crop consultants and agronomists get familiar with diagnosing mid-season soybean diseases.
The event starts at 10:30 am (CST) and no registration is required. The event is free to everyone. Bring plant samples for on-site diagnosis. This event is supported by the South Dakota Soybean Research and Promotion Council.
Most of the soybean stem rot diseases develop in the later part of the season. Although it may be too late for in-field management practices for soybean this growing season, accurately diagnosing what is causing soybeans to die may help with making future disease management decisions.
During this time of the growing season there are also several insect pests that may or may not need to be managed. When making management decisions there are several questions that need to be addressed including: which insect pests are present, what are the insect pest populations, what growth stage are the soybeans, and what is the restricted harvest interval for the insecticides I might apply?
Participants will have hands-on practice in identifying Phytophthora root rot, stem canker, white mold, soybean cyst nematode, and other soybean diseases.
Adam Varenhorst, SDSU Extension Field Crop Entomologist, will also talk about late season insect pests that are showing up in soybean fields and also pyrethroid resistant soybean aphids in South Dakota.
The soybean disease field day will be held 8 miles north of Brookings and 2 miles west on 200th Street and 469th Avenue, about half a mile south on 469th avenue. The field is on the west side of the road.