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Title: Uroleucon formosanum (Takahashi) (Homoptera: Aphididae) Found on Youngia japonica (L.) DC on Guam and Rota in the Mariana Islands 
Author: Miller, R. H.; Idechiil, O.; Foottit, R. G.; Pike, K. S.
Date: 2003-11
Publisher: Hawaiian Entomological Society
Citation: Miller RH, Idechiil O, Foottit RG, Pike KS. 2003. Uroleucon formosanum (Takahashi) (Homoptera: Aphididae) found on Youngia japonica (L.) DC on Guam and Rota in the Mariana Islands. Proc Hawaiian Entomol Soc 36:125–127.
Abstract: Uroleucon formosanum (Homoptera: Aphididae) was collected from Asiatic (Oriental) hawksbeard, Youngia japonica, on Guam and Rota in 2003. These collections constitute a significant range expansion for U. formosanum into the western Pacific region. The aphid and its host plant were likely accidentally introduced to the islands in cargo or by travelers returning from known host regions in eastern Asia and Japan.
Description: Scientific note.
ISSN: 0073-134X
URI: http://hdl.handle.net/10125/109
Keywords: Guam, Rota, Northern Mariana Islands, Aphidoidea, Uroleucon formosanum, Youngia japonica, Micronesia, host plants, Asteraceae, geographical distribution, new geographic records, introduced species, islands

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