A black, two-millimeter-long wasp from East Africa is helping wage war on one of its own kind—the Erythrina gall wasp, an invasive species that's decimated Hawaii's endemic wiliwili (Erythrina ...

When the lands get really dry and other plants are stressed, the wiliwili drops its leaves and blooms. ADVERTISING When the lands get really dry and other plants are stressed, the wiliwili drops its ...

The Hawaiian wiliwili is coming back. Though this attractive dryland forest tree was severely threatened by the arrival of the invasive erythrina gall wasp, Quadrastichus erythrinae, that arrived in ...

In an effort to save wiliwili trees, the only species of its kind that naturally occurs in Hawaii, state officials are finalizing the details of a plan to fight off an invasive wasp that’s been ...