severity of diseases caused by species of Cercospora can be
adversely affected by later planting date (Enikuomehin et al., 2002;
Swamy et al., 2012; Lemtur et al., 2013). Due to the erratic nature of
NBLS and its potential threat to rice production, better under-
standing of factors affecting epidemic severity is needed. The ef-
fects of propiconazole application on NBLS and rice yield of
cultivars with different susceptibility levels and crop planting times
are unknown. Therefore, the currently reported studies were
designed to develop integrated management strategies to manage
NBLS on cultivars with different susceptibility at different planting
dates. Because no fungicide application timing system exists,
another objective was to determine the best timing of application.