Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Current status of Ludwigia grandiflora (Michx.) Greuter et Burdet (Onagraceae), an invasive alien species, in Osaka Prefecture, Japan.

Abstract

Ludwigia grandiflora (Michx.) Greuter et Burdet (Onagraceae), is an aquatic plant that has been designated as an invasive alien species in Japan. This species was found in Osaka Prefecture in 2014, and its growing places have been confirmed in river. water channel, and irrigation pond throughout Osaka Prefecture. Until September 2019. this species has been found in Takatsuki-shi, Settu-shi, Osaka-shi, Higashiosaka-shi, Yao-shi, Kashiwara-shi, Fujiidera-shi, Sakai-shi, Habikino-shi, and Kishiwada-shi. We reported its growth conditions in Takatsuki-shi, Yodo River, Onchi River. Yamato River and its tributaries, and irrigation ponds of southern area of Osaka. There is a possibility that this species will spread in Osaka Prefecture in the future, and thus continuous monitoring and extermination measures would be necessary.