Distribution: Most common in nurseries with overhead irrigation and in high rainfall areas. Symptoms: Initial symptoms are small, water-soaked, translucent to light yellow to light brown banded areas running along and around leaf veins. Mature lesions develop a brown to black color and may have a chlorotic (yellow) halo; lesions range from a minimum of 1-2 mm wide …
Category: Pests
AAA shares pest information regularly, so that industry professionals and the public can stay informed and help protect Hawaii's trees.
Jun 20
Pest of the Month May 2008 – Ohia Rust
Distribution: Widespread throughout the Hawaiian Islands (except Niihau) Hosts: Wide range of hosts on various members of the Family Myrtaceae including ohia, Eucalyptus, paperbark, guava, rose apple, allspice, species of Eugenia, myrtle, and others. Other common names: eucalyptus rust, guava rust Symptoms: Starts as tiny bright yellow powdery eruptions in a circular pattern. These expand causing …
Jun 16
Pest of the Month February 2008 – Glassy-winged Sharpshooter
Distribution: Leeward Oahu Hosts: monkeypod, java plum, haole koa, Plumeria, mountain apple, African tulip, lime, pummelo, kou, bottlebrush, Caribbean trumpet, hibiscus, gardenia, papaya, green/red ti, croton, crown flower, and oleander Damage: Can withdraw plant fluid 100-300 times its weight per day. Releases tiny droplets as it does so, creating “leafhopper rain”. May leave a white …
Jun 13
Pest of the Month November 2007 – Papaya Mealybug
Distribution: Major Hawaiian Islands. Native to Mexico and Central America. Also found through the Caribbean, in Florida, and Guam. Hosts: Papaya, plumeria, hibiscus, and Jatropha Damage: Chlorosis (yellowing), stunting, deformation, early leaf and fruit drop, and sooty mold growing on honeydew from the mealybug. Heavy infestations can kill the plant. Biological Control: parasitic wasps, ladybugs. …