Unfortunately, it is here to stay, says Bish, so growers need to understand how to best manage it.
Yield losses can be substantial – 20 to 40 bushels per acre during severe outbreaks. However, Bish notes that not every year will see a severe outbreak.
Confirmation does not mean the disease is severe enough to warrant fungicide applications. Bish will give recommendations on in-season management and discuss application timing, return on investment and identification tips.
Red crown rot: an emerging threat to soybean
Bish will also discuss red crown rot, a soybean disease confirmed in Missouri for the first time in 2024. Yield losses can range from 15% to 70% in affected areas. The fungus survives the winter in plant residue and prefers warm and wet conditions for growth.
Bish recommends careful scouting and a “roots up and stems split” approach: Dig up symptomatic soybean plants to examine roots and split the stems open to distinguish red crown rot from sudden death syndrome and other conditions that cause similar symptoms on soybean leaves.
Save the date
Registration for the field day will be available soon at https://extension.missouri.edu/events, Bish says. She and MU Extension weed scientist Kevin Bradley urge interested parties to save the date of July 10 for this popular annual event.
Source : missouri.edu