Invasion information |
Range in Japan |
Central to southern part of Ryukyu Archipelago. Ogasawara Islands. |
|
Origin |
Hawaii, Saipan, or some other Pacific Islands. |
Date |
The first record in Japan was at Okinawajima Island in May 1947. After, this species has spread as following: Miyakojima and Ishigakijima is. 1951; small islets around Okinawajima Is. 1952-1954; Amami Islands 1966-1968. |
Route |
Accidental: Hitchhiking on U.S. military transport, or with sweet potato transported with evacuation from Pacific Island after W.W.II. From Miyakojima to Ishigakijima Is. hitchhiking on sweet potato. |
Impact |
Damage on agriculture of sweet potato and Convolvulaceae plants. Native organism(s) affected: Convolvulaceae plants; Crops (sweet potato) |
Regulation in Japan |
Quarantine Pest. To prevent spread of this species, import of live vines, leaves, tuberous roots, and other underground portions of plants of Ipomoea, Pharbitis, and Calystegia, live tuberous roots and other underground portions of cassava from areas with Cylas formicarius to Japan is prohibited. In addition, transport of above plants from southern (up to 28°40’N) islands even within Japan needs quarantine inspection (sweet potato) or is prohibited (other plants) by the Plant Protection Law. |
Introduced range in other countries |
South America, Pacific Islands. |