Ostrinia ovalipennis is a moth in the family Crambidae. It was described by Suguru Ohno in 2003. It is found in Japan, where it has been recorded from Honshu and Hokkaido."New records of Ostrinia ovalipennis (Lepidoptera: Crambidae) from Hokkaido, and morphometric analyses for species identification and geographic variation"
Adults have been recorded on wing in July, probably in one generation per year.
The larvae feed on Reynoutria sachalinensis."A new knotweed‐boring species of the genus Ostrinia Hübner (Lepidoptera: Crambidae) from Japan"
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