Controle da podridão abacaxi da cana-de-açúcar por meio da pulverização de fungicidas em rebolos no sulco de plantio

Abstract

Sugarcane pineapple disease, caused by the fungus Thielaviopsis paradoxa, can cause germination and yield decreases of up to 50% and 42%, respectively. The aim of this research was to assess the control of this disease through infurrow fungicide application on seedpieces. Two experiments were installed in greenhouse and one under field conditions with this purpose. The substrate and the soil were infested with the pathogen before the sugarcane planting and the fungicides were sprayed on seedpieces immediately after the planting with a CO2 backpack sprayer. Seedpieces in-furrow spraying was effective in controlling the pineapple disease with certain fungicides, providing up to 12% yield recovery. Among the tested treatments, the fungicides pyraclostrobin + epoxiconazole; pyraclostrobin and propiconazole showed good potential for pineapple disease control.