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A total of 52 gall-inducing species of Cecidomyiidae (Diptera) (53 in the sorts of midge gall, because one polyphagous species was included)were recognized to occur in the Korean Peninsula (including surrounding islands) through literature survey, field surveys by Dr. K. Yamagishi and ourselves, and by examining photographs of arthropod galls taken by the late Prof. W.-H. Paik and one of us, JCP. The previous and current identification of these Korean gall midges relied largely upon their gall morph and host plant species that correspond to those of Japanese gall midges. The identification of these gall midges was considered to be mostly reliable, because recent DNA analysis suggested that some South Korean gall midges were identical with Japanese gall midges when they induce the same sorts of gall on the same host plants as those in Japan. At the moment, 47 (88.7 %) out of the 53 sorts of Korean midge galls were commonto Japan. This means that more numerousmidge galls will be detected in the

Abstract:The Asian citrus psyllid, Diaphorina citri Kuwayama, transmits pathogenic bacteria that cause the citrus greening disease Huanglongbing . To explore an effective monitoring method, we compared the effects of four yellow sticky traps, two blue sticky traps, and a reflective sheet on the orientation of D. citri adults under artificial sunlight in the laboratory. In addition, the reflectance spectra of each trap and the reflective sheet were measured to examine which wavelengths attract or inhibit D. citri adults. Yellow sticky traps and the reflective sheet showed high reflection around the wavelength 550 nm and attracted D. citri, as well as other psyllid pest species. A combination of a yellow sticky trap and a host plant was more attractive than a yellow sticky trap or a host plant alone. Blue sticky traps that showed high reflection around 450 nm did not attract or inhibit D. citri. Further studies are required to compare these results with field data. To develop more effective sticky traps, the mechanism underlying the attractiveness of the wavelength 550 nm for the psyllid should be investigated.

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