FLOOD-FALLOWING FOR ERADICATION OF FUSARIUM OXY-SPORUM F. CUBENSE

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Abstract
[long dash]Flooding of banana land to eradicate Fusarium oxysporum f. cubense, the organism causing Panama disease, was undertaken by the United Fruit Company in 1939. The land is submerged under 2 to 5 ft. of water for periods up to 6 mos., then drained and planted. Flooding causes a reduction of at least 50% in the numbers of indigenous soil fungi during the 1st 35 days of submergence. At least 85% of the indigenous Fusaria are eradicated during the 1st 40 days of flooding. After 60 days of submergence, fungi present on the submerged soil are derived largely from a migratory flora entering the lake with river water, which is often laden with silt.

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