The present technology relates to methods of controlling Fusarium virguliforme, Fusarium brasiliense sp. nov., Fursarium cuneirostrum sp. nov., Fusarium tucumaniae and Soybean Sudden Death Syndrome (SSDS) using thiabendazole. In one embodiment the present technology relates to methods of controlling Fusarium virguliforme and Soybean Sudden Death Syndrome (SSDS) using thiabendazole.