The recent reemergence of rice black-streaked dwarf virus (RBSDV) has caused severe rice yield losses in several areas of East Asia. To identify the most important infectious sources of RBSDV, we compared the susceptibility of major poaceous plants to RBSDV infection and survival and the RBSDV acquisition efficiency of a vector insect, the small brown planthopper . RBSDV infection and survival rates of were significantly high in wheat ( 'Norin61') and rice ( 'Reiho'), indicating that these crops can be important sources of RBSDV. Our results also showed that RBSDV can complete its infection cycle between Italian ryegrass ( 'Hataaoba') and . These results indicate that control of RBSDV and on winter-spring crops of wheat and Italian ryegrass may avoid an RBSDV epidemic on rice during the following summer. In addition to infections of wheat and Italian ryegrass, RBSDV infections were detected in , subsp. , , , , , and var. , although the infection efficiency varied.
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| http://dx.doi.org/10.1094/PDIS-08-18-1340-RE | DOI Listing |
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