Category Archive: Pests

AAA shares pest information regularly, so that industry professionals and the public can stay informed and help protect Hawaii's trees.

Nov 29

Pest of the Month – November 2017

CANKERS Excerpted in part from Hawai‘i Landscape Plant Pest Guide: Plant Diseases, by Dr. Scot Nelson, University of Hawaii College of Tropical Agriculture and Human Resources (UH-CTAHR) PD-105, January 2015, available at: https://www.ctahr.hawaii.edu/oc/freepubs/pdf/PD-105.pdf Photos: Dr. Scot Nelson Description: Cankers are sunken areas of dead tissue or splits in the bark or epidermis of branches, stems, …

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Nov 02

Pest of the Month – October 2017

SNAILS and SLUGS Photos: Angela Liu  Arborists are concerned about land mollusks – snails, slugs, and semi-slugs – because ornamental woody plants provide hiding places for these pests. Tree seedlings, young leaves and tree fruit also provide forage for these gastropods. Exotic snail species are introduced when plant materials (landscaping supplies, Christmas trees, etc.) are …

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Aug 30

Pest of the Month – August 2017

Pest of the Month – Bot canker, aka Ficus branch dieback (Botryosphaeria complex) * This pest is not currently in Hawai’i. AAA raises awareness of potential pest threats so that arboriculture professionals and residents alike can help our state monitor and identify pest problems when they arise.   Photos: University of California, Division of Agriculture & Natural Resources …

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Mar 20

Pest of the Month – March 2017

Light-brown apple moth (Epiphyas postvittana) * This pest is not currently in Hawai’i. AAA raises awareness of potential pest threats so that arboriculture professionals and residents alike can help our state monitor and identify pest problems when they arise.   Description: Described by University of Florida as “extremely polyphagous”, this insect threatens ecological, agricultural, and …

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Nov 15

Pest of the Month – November 2016

Pest of the Month                                   Ficus Leaf-Rolling Psyllid (aka FLRP, Trioza brevigenae) Photos: Donald R. Hodel, University of California Cooperative Extension, Los Angeles County   Distribution: Discovery of the pest in six counties in southern California constitutes a new …

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Oct 25

Pest of the Month – October 2016

Pest of the Month Mamaki Rust (Pucciniastrum boehmeriae) Photos: Hawaii Department of Agriculture, Plant Pest Control Branch   Description: Mamaki rust was only recently observed for the first time in Hawaii. Distribution: Widespread in eastern Asia. On the Big Island, Hawaiian Acres, Kurtistown. On Oahu, in the Koolau Mountains. Hosts: First seen on endemic mamaki, aka mamake or waimea …

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Sep 25

Pest of the Month – September 2016

Pest of the Month South American Palm Weevil (Rhynchophorus palmarum) Photos: UC IPM Green Bulletin (Vol.6 No.2 August 2016) Description: This weevil is currently not in Hawaii; please help keep an eye out for it. The adult is ~1 ½ inch long, shiny black, with small hairs on its body and a typical weevil “snout”. The …

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Aug 25

Pest of the Month – August 2016

Pest of the Month — Verticillium Wilt   DESCRIPTION Verticillium wilt is caused by a variety of fungal species of the genus Verticillium, most notably V. dahliae and V. albo-atrum. It is “one of the most widespread and destructive soilborne diseases of plants” (UC IPM). Verticillium infects a plant through the roots and multiplies in the …

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Jul 25

Pest of the Month – July 2016

PEST ALERT – Diaprepes Root Weevil Photos: University of California Cooperative Extension (See Additional Resources below)   Distribution: The Diaprepes root weevil (Diaprepes abbreviatus) is currently not present on any Hawaiian islands. Native to Caribbean region, it was introduced into Florida in 1960s. The beetle is established in certain 
quarantine areas in Southern California (Los …

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Jun 25

Pest of the Month – June 2016

Pest of the Month – Chilli Thrips (Scirtothrips dorsalis) Description: Chilli thrips is a polyphagous species found in Oahu in 1987. Mature chilli thrips are less than 1-2 mm in length. Field identification should be confirmed by a professional entomologist. Hosts: Attacks over 100 species in 40 different Families, including crape myrtle, golden dewdrop, star jasmine, camellia, Indian hawthorn, Acacia spp., Ficus elastica, Schefflera …

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