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Fusarium
Root Rot and Blight in soybeans is caused by various species of Fusarium fungi, which are present
in most soils and survive from season to season on crop residues. They infect
seed, seedlings and the roots and lower portions of soybean stems. Infected
seeds and seedlings may rot and die. Surviving seedlings may be stunted and wilt
when soil moisture is low. Older plants are seldom killed by this fungus, but
they wilt when soil moisture is low. The disease often is more severe in
early-planted soybeans and in clay soils. To control this disease plant
high-quality seed in warm, well-drained soil. All varieties are susceptible and
crop rotation is of little value in control.
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