TY - JOUR
T1 - Prevalence of rice stripe virus can be altered by temperature and the virus-mediated development of insect vector, Laodelphax striatellus, in Korea
AU - Lee, Minho
AU - Lee, Sunyoung
AU - Park, Jin Woo
AU - Son, Jino
AU - Lee, Doo Hyung
AU - Ryoo, Munil
AU - Cho, Kijong
N1 - Funding Information:
This study was carried out with support from the National Research Program for Agricultural Science & Technology Development (Project No 2006139 ), Rural Development Administration , Republic of Korea.
Publisher Copyright:
© 2017 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society
PY - 2017/12
Y1 - 2017/12
N2 - Since the 2000's in Korea, the regional hotspots of rice stripe virus (genus Tenuivirus, RSV), transmitted by small brown planthopper (Laodelphax striatellus (Fallén), SBPH), have changed from the southeastern to the western coastal regions. The reasons for this are as yet unknown, but recent changes in temperatures in spring, the time at which the vectors migrate from overwintering sites to rice fields, are thought to be an important factor. In this study, we investigated the differences in the development of RSV-infected and RSV-free SBPH populations and further investigated how spring temperatures affect RSV transmission to rice (Oryza sativa). Two temperature conditions (15 and 20 °C) were chosen based on the average temperature in April–May and May–June in Korea, respectively, at which the SBPHs begin to migrate from Gramineae weeds to rice during the spring season. The nymphal developmental period in the RSV-infected SBPH was significantly shorter than that in the RSV-free SBPH. The body weight of males was significantly higher in the RSV-infected SBPH than in the RSV-free SBPH at early nymphal stage (1st day of 5th instar). The transmission of RSV to the rice seedlings was higher at 20 °C than at 15 °C. Rapid nymphal development of the RSV-infected SBPH with higher RSV transmission rate at high temperature is considered to be related to the geographical shift of RSV hotspots from the southeastern to the western coastal regions of Korea.
AB - Since the 2000's in Korea, the regional hotspots of rice stripe virus (genus Tenuivirus, RSV), transmitted by small brown planthopper (Laodelphax striatellus (Fallén), SBPH), have changed from the southeastern to the western coastal regions. The reasons for this are as yet unknown, but recent changes in temperatures in spring, the time at which the vectors migrate from overwintering sites to rice fields, are thought to be an important factor. In this study, we investigated the differences in the development of RSV-infected and RSV-free SBPH populations and further investigated how spring temperatures affect RSV transmission to rice (Oryza sativa). Two temperature conditions (15 and 20 °C) were chosen based on the average temperature in April–May and May–June in Korea, respectively, at which the SBPHs begin to migrate from Gramineae weeds to rice during the spring season. The nymphal developmental period in the RSV-infected SBPH was significantly shorter than that in the RSV-free SBPH. The body weight of males was significantly higher in the RSV-infected SBPH than in the RSV-free SBPH at early nymphal stage (1st day of 5th instar). The transmission of RSV to the rice seedlings was higher at 20 °C than at 15 °C. Rapid nymphal development of the RSV-infected SBPH with higher RSV transmission rate at high temperature is considered to be related to the geographical shift of RSV hotspots from the southeastern to the western coastal regions of Korea.
KW - Developmental time
KW - Epidemic model
KW - Geographical shift
KW - Spring temperature
KW - Transmission time
UR - http://www.scopus.com/inward/record.url?scp=85028070598&partnerID=8YFLogxK
U2 - 10.1016/j.aspen.2017.08.012
DO - 10.1016/j.aspen.2017.08.012
M3 - Article
AN - SCOPUS:85028070598
SN - 1226-8615
VL - 20
SP - 1145
EP - 1149
JO - Journal of Asia-Pacific Entomology
JF - Journal of Asia-Pacific Entomology
IS - 4
ER -