The tobacco whiteflies, Bemesia tabaci, infest the Oriental melon and give significant economic damage along with its virus-vectoring activity. Various biotypes of B. tabaci have been well known and are classified depending on the severity of crop damage and insecticide susceptibility. B. tabaci adults were collected in the melon fields and diagnosed with PCR molecular markers. In all 11 sampling sites, B. tabaci adults were diagnosed to be Q biotype. In contrast, B biotype was found in one sampling site. These results indicated that most B. tabaci occurring the Oriental melon fields in Andong is Q biotype.

• Kim, Eunsung(Department of Bioresource Sciences, Andong Natunal University, Andong 760-749, Korea)
• Kim, Yonggun(Department of Bioresource Sciences, Andong Natunal University, Andong 760-749, Korea)