Fusarium Wilt

scouted June 25, 2024

Soybeans were scouted at the V9 growth stage and yellow/brown discoloration of leaves, dieback, and wilting was observed in widespread patches of the field. Seed was treated and soybeans were planted on April 25th.
This issue was confirmed by the NC State Plant, Disease and Insect Clinic to be injury from Fusarium Wilt, caused by Fusarium oxysporum. Fusarium wilt often occurs in irregular patches in the field, and symptoms are often first observed in hot and dry conditions. Symptoms can include interveinal chlorosis, premature defoliation, wilting, and root decay. In this environment, conditions have been hot and very dry, this could have synergized symptomology. Planting during optimal germination conditions for soybean emergence is important in limiting early infections by Fusarium species, along with seed treatments.

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