||Yoshihisa Abe, Invasion of leafminers, Liriomyza spp. (Diptera: Agromyzidae), in the eastern Palearctic region, 国際昆虫学会議, 2012.08, Liriomyza sativae Blanchard, L. trifolii (Burgess) and L. huidobrensis (Blanchard) (Diptera: Agromyzidae) are indigenous to the New World, but they have established populations in the eastern Palearctic region in the last two decades. These three species are polyphagous herbivores that are important pests of numerous vegetable and ornamental crops. Two of the most important of them, L. sativae and L. trifolii, have been introduced into the same geographic areas and species displacement between these two species has been observed. On Hainan Island, China, L. trifolii replaced L. sativae as the predominant leafminer of vegetables, as in the western USA in the 1970s. However, in Japan, L. trifolii was displaced by L. sativae. On Hainan Island, where the management of Liriomyza depends mainly on chemical insecticides, the rapid displacement of L. sativae by L. trifolii can be attributed to the lower insecticide susceptibility of L. trifolii. In contrast, the displacement in the opposite direction in Japan is probably due to the higher fecundity of L. sativae and differential effects of the introduced natural enemy Dacnusa sibirica Telenga (Hymenoptera: Braconidae). In winter, L. sativae and L. trifolii are found only in greenhouses in Japan, and D. sibirica is a more effective parasitoid at low temperatures. When growers in Japan find the mines induced by Liriomyza on vegetables in greenhouses in winter, they usually use D. sibirica to control the leafminers. This parasitoid can control L. trifolii effectively, but cannot control L. sativae..
||Tomohisa Fujii, Kazunori Matsuo, Jyunichi Yukawa, Yoshihisa Abe, Makoto Tokuda, A koinobiont parasitoid manipulates its host cecidomyiid to modify gall morphology to avoid hyperparasitism, 国際昆虫学会議, 2012.08.
||Nakatada Wachi, Yoshihisa Abe, Nobuyuki Inomata, Hidenori Tachida, Inferring speciation history of the Andricus mukaigawae comples (Hymenoptera: Cynipidae) based on nuclear DNA and mitochondrial DNA data, 国際昆虫学会議, 2012.08.
||Tatsuya Ide, Nakatada Wachi, Yoshihisa Abe, Discovery of gall wasps (Hymenoptera: Cynipidae) inducing galls on the strictly Asian subgenus Cyclobalanopsis of the genus Quercus (Fagaceae), 国際昆虫学会議, 2012.08.
||Yoshihisa Abe, Different displacement directions in two species of exotic leafminers in different localities, International Congress of Biological Invasions, 2013.10, Species displacement has occurred between Liriomyza trifolii and L. sativae (Diptera: Agromyzidae). These two Liriomyza species from the New World invaded Asia in the last quarter of a century, and both are notorious pests of vegetables and ornamentals the world over. Except for the two Liriomyza species of leafminer fly, species displacement has not yet been observed to occur in different directions between the same two species under field conditions in different localities. L. sativae was displaced by L. trifolii on Hainan Island in China after 1999. A similar situation occurred in the western USA in the 1970s. In these two cases, the relatively lower insecticide susceptibility of L. trifolii was considered to be the underlying reason for the observed displacements. Unlike the situation in China and the USA, L. trifolii was displaced by L. sativae over most of the Japanese mainland after 1999. The higher fecundity of L. sativae and differential effects of the introduced parasitoid Dacnusa sibirica on the two Liriomyza species were considered to be causes for the observed species displacement. Other studies have generally considered the roles of natural enemies in species displacement to be secondary. Because exotic species are usually introduced without their natural enemies, the absence of parasitization or predation results in a marked increase in the realized fecundity of the exotic species. However, this study showed that D. sibirica may have played a primary role in displacement of exotic leafminer fly species over most of the Japanese mainland. Because L. trifolii and L. sativae cannot overwinter under field conditions there, both species only overwinter in greenhouses. Since D. sibirica is known to be more effective at 15 ℃, it is recommended that this parasitoid be released in greenhouses during the cooler months. Although D. sibirica is an effective biocontrol agent for L. trifolii, it cannot control L. sativae. When any Liriomyza leafminers are discovered in greenhouses in winter, the growers typically release D. sibirica just in case the leafminer is L. trifolii. Consequently, D. sibirica would have reduced the L. trifolii populations, but not L. sativae populations..
||Yoshihisa Abe, Tatsuya Ide, Recent topics in the life history and host relations of gall wasps (Cynipidae) in Asia, 2016 XXV International Congress of Entomology, 2016.09.
||Yoshihisa Abe, Daisuke Taguchi, Egg-pupal and larval-pupal parasitism in the leafminer parasitoid Gronotoma micromorpha (Hymenoptera: Figitidae: Eucoilinae), The 5th International Entomophagous Insects Conference, 2017.10.
||Tatsuya Ide, Yoshihisa Abe, Asexual generation of the gall wasp genus Latuspina (Hymenoptera: Cynipidae: Cynipini), 9th International Congress of Hymenopterists, 2018.07.
||Daisuke Taguchi, Yoshihisa Abe, Developmental differences between egg-pupal and larval-pupal modes of parasitism in Gronotoma micromorpha (Hymenoptera: Figitidae: Eucoilinae), 9th International Congress of Hymenopterists, 2018.07.