The health--and perhaps even the existence--of the wiliwili tree (Erythrina sandwicensis) on Maui is threatened by the Erythrina gall wasp (Quadrastichus erythrinae). Information about the status of EGW by island in Hawaii is also available online.
For further information, contact Lloyd_Loope@usgs.gov.
Unfortunately, the Erythrina gall wasp (EGW), a recently-introduced insect, seriously affects the leaves of the native wiliwili trees. |
In Hawaii, several species of non-native ornamental Erythrina trees have been affected, as well as the native Erythrina sandwicensis. |
For more information about EGW, consult the Hawaii Department of Agriculture's EGW Pest Alert Flyer or the Hawaiian Ecosystem at Risk (HEAR) project's EGW species page. |
Aside from the possible irreversible loss of our native wiliwili trees, many other popular landscaping trees will be affected by the EGW. |
Various Erythrina varieties are widely grown around the Hawaiian islands as specimen trees or to form windbreaks. To see examples of affected (and as-yet-unaffected) trees, see HEAR's Maui EGW monitoring page. |
With proactive management--including initial population suppression, and--later--possibly biocontrol, it is hoped that the future of Hawaii's wiliwili can be bright and long. |
In any event, this recent invasion is yet another "heads-up" that Hawaii desperately needs much-improved quarantine protection to forestall additional--under present circumstances inevitable--successful pest incursions. |
Some documents posted on the HEAR website are in Adobe Acrobat PDF format. If your computer is not already set up to read these files, you can download the FREE Adobe Acrobat reader. You can set up most web browsers to automatically invoke this reader (as a "helper application" or "add-in") upon encountering documents of this type (refer to your browser's documentation for how to do this). |
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This page was created on 06 August 2005 by PT, and was last updated on 24 August 2005 by PT. Text on this page was formulated by Philip Thomas (inspired by Lloyd Loope). Images are from the collections of Forest & Kim Starr and Philip Thomas. |