Occurrence of rice stripe disease and the small brown planthopper Laodelphax striatellus from 2001 to 2017 in the Chuen region of Shizuoka Prefecture in central Japan and the effect of the number of L. striatellus in paddy rice fields on the incidence of rice stripe disease in the following year

Abstract

In this study, we aimed to investigate the relationship between the percentage of rice stripe diseased plants and the population of small brown planthopper (Laodelphax striatellus) in paddy rice fields. Additionally, we sought to examine the abundance of L. striatellus in wheat fields and the percentage of Rice stripe tenuivirus (RSV)-carrying L. striatellus in wheat fields in the Chuen region of Shizuoka Prefecture, central Japan, from 2001 to 2017. The results revealed a positive correlation between the abundance of L. striatellus in a rice field and the incidence of rice stripe disease in plants in the following year. However, no correlation was observed between the prevalence of rice stripe disease in plants and the abundance of L. striatellus in paddy rice fields in the same year, the proportion of L. striatellus in wheat fields, the proportion of RSV-carrying L. striatellus in wheat fields, or the abundance of RSV-carrying L. striatellus in wheat fields.