Brown Stem Rot of Soybeans
KEY POINTS
- Brown stem rot infects roots early in the season, but symptoms of vascular system damage usually appear in mid-summer.
- Development is favored by moderate temperatures (60 to 80 ºF) and soil moisture is near field capacity.
- Infection causes vascular and pith tissues to turn brown to reddish-brown.
- Soybean varieties are rated for genetic resistance to brown stem rot.