Category: Pests

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

Oct 07

October 2013 Pest of the Month

Melaleuca Psyllid – Boreioglycaspis melaleucae Moore An introduced psyllid for biological control of Paperbark trees in Florida. Hosts: Melaleuca quinquenervia (Paperbark Tree), Melaleuca leucadendra, Melaleuca nervosa, Melaleuca argentea, Melaleuca viridiflora, Melaleuca nodosa, and Callistemon citrinus (Bottlebrush). Distribution: B. melaleucae has been collected from all states in its native Australia except South Australia. Specimens released in …

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Sep 10

September 2013 Pest of the Month

Citrus Mealybug (Planococcus citri) Hosts: Annona, Arabica, and Robusta coffee, cotton, banana, carambola, cacao, flowering ginger, macadamia, mango and plants belonging to Citrus genus. Distribution: This pest has a pan tropical distribution that extends into subtropical regions. It is present in nearly all coffee growing countries. Damage: Leaves of plants attacked by the root form …

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Sep 10

August 2013 Pest of the Month

Host: Coconut and Oil palms mainly – but also may attack other palm species Distribution:  South Pacific (American Samoa, others) and Guam. Damage: V-shaped cuts in the fronds or holes through the midrib Control: Eliminating the places where they breed and manually destroying adults and all stages of life cycle – eggs, larvae, and pupae.  …

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Sep 08

July 2013 Pest of the Month

Graphiola leaf spot – Graphiola phoenicis Hosts: The primary hosts in Floridaare Phoenix species, especially Phoenix canariensis (Canary Island date palm) and Phoenix dactylifera (date palm). Distribution: Widely distributed throughout the date-palm growing world. Damage: Very small black, cup-shaped fungal bodies (sori) are present on leaf blade of the oldest leaves.  This disease is primarily …

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Sep 08

June 2013 Pest of the Month

Acacia Psyllid – Psylla uncatoides Hosts: Acacia koa, Acacia koaia Distribution: Originates in southeast Australia. Also found in New Zealand, California, and Hawaii. Damage: Feeds primarily on the young terminal growth. Heavy infestations can severely defoliate and kill twigs and branches. Control: A biological control, Harmonia conformis, was successfully established in Hawaii in the 1970s. …

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Sep 08

May 2013 Pest of the Month

Gliocladium blight – Pink Rot of Palms Pathogen:  Gliocladium vermoeseni (fungus) (recently renamed Nalanthamala vermoeseni). Hosts: Chamaedorea spp, Dypsis spp. (Areca palms, etc.), date palm, queen palm, Mexican fan palm, others. Symptoms: Invasive rot of buds, petioles, leaf blades, and trunks/stems, dark brown necrotic areas near the base of the stem, gummy exudates, premature death …

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Sep 05

April 2013 Pest of the Month

Boron Deficiency Hosts: Palms Symptoms Twists or bends in the stems, failure of apical meristems to fully open and expand, and leaf wrinkling or crumpling known as “accordion leaf”. There may be chlorosis in young leaves, shortening of terminal internodes, or “scorched” leaf tips.  Fruits may abort prematurely due to functional failure of pollen tubes.  In certain …

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Apr 16

March 2013 Pest of the Month – Croton Caterpillar (Achaea janata)

Distribution:  Widespread throughout the tropical and subtropical Pacific, in Australia, and Asia Hosts: Croton, castor bean, Ficus, macadamia, and others.  Damage: Caterpillar feeds on the leaves of hosts, leaving veins and petioles Control    (a) There are several biological controls in Hawaii.    (b) Some chemical control has been achieved using pyrethroids insecticides. Reference: Achaea …

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Mar 18

February 2013 Pest of the Month – Polyphagous Shot Hole Borer (Euwallacea sp.) and Fusarium Dieback (Fusarium sp.) (PEST ALERT)

Distribution: Southern California.  Widespread in Los Angeles and Orange Counties.  Believed to have originated in Southeast Asia or Africa.  This species appears to be a new, unnamed species so not much is known.  It has also been found in Israel where it has done severe damage to avocado groves. Hosts: Avocado, castor bean, others.  Attacks …

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Feb 26

Pest of the Month January 2013 – Coconut Leaf Beetles (Brontispa longissma – PEST ALERT & Brontispa chalybeipennis – in Hawaii)

Most of the info below is for B. longissma. Distribution: Native to Indonesia andPapua New Guinea.  Found in Australia, many Pacific Islands, Malaysia, Singapore, Cambodia, Laos, Thailand, Vietnam, the Maldives, Myanmar, and China Hosts: Coconut palms preferred, attacks more than 20 palm species including royal palm, Alexandra palm,Californiafan palm, Mexican fan palm, bottle palm, Chinese …

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