ABSTRACT
This study was carried out in order to evaluate the effect of nitrogen fertilization and the timing of chemical application on the control and severity of Tilletia barclayana. Two experiments were carried out, with the application of 108 and 135 kg of N ha-1. Each test involved the aerial application of fungicides based on Myclobutanil (75, 150, 225 and 300 g ha-1 a.i.), Trifloxystrobin + Propiconazole (93.75 + 93.75 g ha-1 a.i.) and an untreated control; applications in R3 and R4. The parameters evaluated were the incidence and severity of disease, grain quality and yield. The incidence and severity of the disease were affected by levels of nitrogen, fungicides and by the time of application, which influenced grain quality; however no influence of the two factors was observed in relation to the yield.
KEY WORDS
Kernel smut of rice; nitrogen; fungicide; time of application