Fusarium wilt, a soil-borne fungal disease caused by Fusarium oxysporum f. sp. Cubense (Foc) causes death of banana plants. The disease continually threatens the popular Cavendish cultivar, ‘Grand Nain,’ which is exported by numerous companies in Mindanao.
Foc has four known races: 1, 2, 3, and 4, which are identified based on the reaction to specific hosts. In the Philippines, occurrence of the disease is caused by races 1 and 2 and recently by the most virulent Tropical race 4 (TR4).
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