The distribution, biology and host preferences of Cryptorhynchus melastomae Champion (Coleoptera: Curculionidae) were studied in Costa Rica from May to July 2005 and January to May 2006 to determine its suitability as a biocontrol agent for Miconia calvescens DC (Melastomataceae) in Hawaii. Specimen records compiled from various collections indicate a distribution from Mexico to Ecuador. In its native Costa Rica all life stages of C. melastomae are associated with M. calvescens and adults and larvae can severely damage or kill small seedlings. Adults are nocturnal and apparently prefer to feed and oviposit on M. calvescens seedlings. Comparisons between its environmental conditions in Costa Rica and Miconia-infested areas in Hawaii suggest the insect should thrive if released. Initial host range tests indicate that C. melastomae is host-specific to the Melastomataceae. This does not rule it out as a biocontrol agent because all Melastomataceae in Hawaii are invasive weeds; there are no native species on the islands.

No description available.