Epidemiological Researches on Rice Blast Disease Caused by Pyricularia oryzae

Efkan AKÇALI, Şener KURT
2021 Kahramanmaraş Sütçü İmam Üniversitesi Tarım ve Doğa Dergisi  
In 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 Osmancık-97 rice cultivars were investigated under controlled environmental conditions. Rice cultivars Edirne and Osmancık-97 were inoculated with a conidial suspension (5x10 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
more » ... (20 to 32°C) over the course of infection period. Disease severity on cvs. Edirne and Osmancık-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°C, while the lowest disease severity values were observed 6 h leaf wetness duration at 20°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.Osmancık-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.
doi:10.18016/ksutarimdoga.vi.851241 fatcat:l6p5zaaf25giroose6ugmbrmmu