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California Eucalyptus Pest

The Redgum Lerp Psyllid is an invasive species from Australia that made its way to California in 1998. The insect is also found in Arizona, Florida, Hawaii, and Mexico. Psyllid adults and nymphs suck plant phloem sap through strawlike mouths and secrete honeydew that causes dark mold growth and premature leaf drop. As the leaves fall off of the trees the trees become increasingly weaker due to lack of sunlight.

The Redgum Lerp Psyllid is mainly being managed by an introduced, psyllid-specific parasitic wasp along the California coasts. Adequate irrigation and limiting nitrogen can also be used to manage psyllid numbers. While systemic insecticides have been helpful in some areas, their efficiency has been disappointing and varied.


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