1College of Agronomy， Hainan University， Haikou 570228, Hainan， China； 2Environment and Plant Protection
Institute， Chinese Academy of Tropical Agricultural Sciences， Laboratory of Integrated Pest Management on Tropical
Crops， Ministry of Agriculture， Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural
Pests， Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pests， Haikou
571101， Hainan， China
Abstract：In order to obtain aphid-resistant watermelon〔Citrullus lanatus（Thunb.）
Matsum. et Nakai〕varieties，we adopted the methods of aphid number ratio and the aphid index
under lab and field conditions to identify aphid resistance．The results showed that varieties with
high resistance to aphid were‘ Heipi’and‘Lyumeiren’．Varieties with resistance to aphid
were‘ Heimeiren’ and‘ Huilan’．Varieties with high susceptible to aphid were‘ Tianmeiren’
and‘Hualyu’．
