Fukui Prefecture

Researchers have confirmed that the invasive plant Nagae-tsurunogeito (long-stalked alligator weed), spreading in Fukui and along the Shin Tone River in Inashiki, Ibaraki Prefecture, has exceptionally high photosynthetic ability, which explains its rapid stem growth. The finding is expected to help develop control methods that target this weakness to curb the weed's spread and protect local ecosystems.