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ARS Home » Pacific West Area » Riverside, California » National Clonal Germplasm Repository for Citrus » Research » Publications at this Location » Publication #291633

Title: Field ID guide to citrus relative hosts of Asian citrus psyllid & Huanglongbing

item SIEBERT, TONI - University Of California
item Krueger, Robert
item KARP, DAVID - University Of California
item KAHN, TRACY - University Of California

Submitted to: Extension Publications
Publication Type: Book / Chapter
Publication Acceptance Date: 6/1/2012
Publication Date: 6/1/2013
Citation: Siebert, T., Krueger, R., Karp, D., Kahn, T. 2013. In: Polek, M., Batkin, T. (eds.). Field ID guide to citrus relative hosts of Asian citrus psyllid & Huanglongbing. Visalia, CA: Citrus Research Board. p. 1-62.

Interpretive Summary: Huanglongbing is a devastating disease of citrus. In the United States, it is associated with the bacterium Candidatus liberibacter asiaticus and vectored by the Asian Citrus psyllid, Diaphorina citri. Control measures, implemented by governmental agencies and private enterprises, include scouting and vector control. An appropriate level of scouting activity involves scouting not only citrus but also other species of plants that can serve as alternative hosts for either the bacterium or the vector. Species that have been identified as alternative hosts are related to citrus but are uncommon and not well known. This publication provides photographs and information on alternative hosts. It is designed to be utilized by scouting and regulatory personnel in identifying potential alternate hosts of HLB and ACP. Users might include personnel from Customs and Border Patrol, California Department of Food and Agriculture, USSDA-APHIS, Agricultural Commissioners Office, etc.

Technical Abstract: The Rutaceae family of plants includes not only species within the genus Citrus, but also several other genera and species that may not be easily recognized as having any relationship to citrus at all. However, many of these citrus relatives are used for ornamental, culinary, or religious purposes. Their fruit, leaves and/or budwood are sometimes brought into the United States illegally through various routes, and are often hosts of citrus pathogens and pests of quarantine significance. Part of reducing the risk posed from illegal introductions of Rutaceae which may harbor the Huanglongbing (HLB) associated bacteria, Candidatus Liberibacter sp, begins with the ability to identify these species. This publication provides photographs, botanical information and uses, and the risk that each species poses to citrus based upon whether the species is a host of the Asian Citrus Psyllid (ACP) vector, the disease Huanglongbing (HLB), or both based on published reports.