Helmintosporiose fungicide control efficacy was evaluated in coconut plants, at field conditions. The experiment was conducted in Ocauçu-SP (Brasil), using 8-months old plants. Three sprayings were applied, within 15 days intervals, with 600 liters of spray volume/ha. The treatments were defined by three doses of the following fungicides: prothioconazole (0.100 and 0.150 L/ha), tebuconazole (0.150 and 0.200 L/ha) and propiconazole (0.125 and 0.250 L/ha). The first spray was in symptomatic plants, therefore every evaluated plant had its old leaves as the inoculum source. The disease index evaluation was done in young leaves, which are susceptible to this pathogen under favorable environment conditions. All the fungicides and their doses used were efficient in controlling helmintosporiose leaf spot, except for their respective check-treatments (control treatments).
Bipolaris incurvata; tebuconazole; propiconazole; prothioconazole; Cocos nucifera
