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Plants with Phytophthora
Root Rot are most common in low, poorly drained areas, headrows where soil
is compacted, and heavy clay soils. Symptoms of the disease also may appear on
higher ground during a wet season. Use of no-till may increase the disease. The
disease pattern varies within a field. It may be circular, corresponding to
poorly drained areas, or it may occur as a dead or dying individual plant or
groups of plants in a row. Severely affected fields have uneven appearance both
in color and plant height.
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