한국과 중국 채집 담배가루이 지역계통의 B, Q biotype 분포 및 살충제 약제반응, 토마토황화잎말림바이러스 보독율 비교

International trade is one of the primary ways that non-native species spread worldwide. Korea and China are geographically close and have a large mutual trade volume. To investigate the population movement of the invasive whitefly (Bemisia tabaci Gennadius) between the two countries, we compared the biotype distribution, insecticidal response, and the TYLCV (tomato yellow leaf curl virus) viruliferous rate of local populations collected in 2019. Based on the mitochondrial DNA COI sequences of B. tabaci, only the Q biotype was found in all populations in Korea, whereas the B biotype (14.3%) and Q biotype (85.7%) were found in China. In the haplotype composition of the B. tabaci Q biotype, only the Q1 group [Q1H1 (79.8%) and Q1H2 (20.2%)] was observed in China, but the Q1 group [Q1H1 (1.7%) and Q1H2 (97.5%)] and the Q2 group (only one individual) were found in Korea. The Korean populations showed high mortality (more than 80%) from 15 commercial insecticides, but the Chinese populations showed significantly low mortality from eight insecticides. No TYLCV infections were observed in the Korean populations while the average TYLCV viruliferous rate was 21.4% in the Chinese populations. Taken together, the results suggest that the population structures of B. tabaci in the two countries are different and may have different immigration histories.