Brown Stem Rot of Soybeans

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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.

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