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Anderson, R. C., and D. E. Gardner. 2002. Recent developments in the biological control of kahili ginger with Ralstonia solanacearum in Hawaii. Proceedings of the Western International Forest Disease Work Conference; 14 - 18 August, 2000; Waikoloa, Hawaii.
ABSTRACT
Kahili ginger (Hedychium gardnerianum) is an invasive weed in the tropical forests of Hawaii and elsewhere. The wilt-causing bacterium Ralstonia (=Pseudomonas) solanacearum has previously been investigated as potential biological control agent for kahili ginger. This bacterium was shown to have significant potential in controlling this weed if effective delivery methods could be developed. To address this need, research into the development and fieldtesting of new application techniques for the control of kahili ginger with R. solanc arum were studied in Metrosideros polymorpha forests on the island of Hawaii. Two objectives were investigated in this study: 1) pilot testing of R. solanacearum-encapsulated alginate beads for Hedychium control, and 2) to determine the optimal application protocols for use by resource managers engaging in kahili ginger biocontrol. Treatments consisted of inoculating mechanically wounded ginger mounds with bacterial encapsulated alginate beads to determine the efficacy of this application method in the field. All mounds treated with this method became infected 6-8 weeks after inoculation. Both rhizome and stem infections were observed. Infections spread within mounds and into the soil as rotting rhizome tissues decayed away. Because of its ease of application, bacterial encapsulated alginate beads provide an alternative method for inoculating this weed in remote areas that are not easily accessible.

FULL TEXT
Full text not available for this publication.

HOSTS
Hedychium gardnerianum - Kahili ginger

PATHOGENS
Ralstonia solanacearum - Ralstonia

RELEVANT TO BIOCONTROL
Yes.

KEY WORDS
Hedychium gardneranium, Ralstonia solancearum.

IMAGES
14_036 -- kahili ginger with bacterial wilt 10 weeks after inoculation 14_036 - kahili ginger with bacterial wilt 10 weeks after inoculation
PATHOGEN: Aspergillus melleus
14_037 -- treated cut ginger 10 months after inoculation 14_037 - treated cut ginger 10 months after inoculation
PATHOGEN: Aspergillus melleus
24_087 -- wall poster, St. John 4th floor 24_087 - wall poster, St. John 4th floor
PATHOGEN: Aspergillus melleus
42_074 -- lab 42_074 - lab
PATHOGEN: Aspergillus melleus
42_075 -- lab 42_075 - lab
PATHOGEN: Aspergillus melleus
42_076 -- lab 42_076 - lab
PATHOGEN: Aspergillus melleus

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