Akcali, EfkanKurt, Sener2024-09-182024-09-1820212619-9149https://doi.org/10.18016/ksutarimdoga.vi.851241https://search.trdizin.gov.tr/tr/yayin/detay/1117280https://hdl.handle.net/20.500.12483/12066In this study, the effects of temperature and the duration of leaf wetness on the development of rice blast disease caused by Pyricularia oryzae and the reactions of Edirne and Osmancik-97 rice cultivars were investigated under controlled environmental conditions. Rice cultivars Edirne and Osmancik-97 were inoculated with a conidial suspension (5 x 10(5) conidia ml-1) of P. oryzae and exposed to combinations of five different leaf wetness durations (from 6 to 30 h) and four different temperatures (20 to 32 degrees C) over the course of infection period. Disease severity on cvs. Edirne and Osmancik-97 increased with increasing temperatures and hours of wetness duration. The highest disease severity was detected on plants exposed to 30 h leaf wetness duration at 28 degrees C, while the lowest disease severity values were observed 6 h leaf wetness duration at 20 degrees C temperature. Increased leaf wetness durations significantly increased disease severity at optimal temperature. But, it was observed that the all disease severity values on cv.Osmancik-97 was lower than cv. Edirne at same temperatures and leaf wetness durations. In addition, a new and simple technique was developed to increase the sporulation capacity of the P. oryzae to provide enough inoculum quantity in the experiments by this study.eninfo:eu-repo/semantics/openAccessRice blastDuration of leaf wetnessTemperatureDisease severityArticle2461221122910.18016/ksutarimdoga.vi.8512411117280WOS:000725487000011N/A