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United States Department of Agriculture

Agricultural Research Service

Title: Vector Transmission of the Causal Agents of Citrus Variegated Chlorosis, Huanglongbing and Citrus Tristeza Using Endemic and Newly Established Insect Species

item Bralnsky, Ronald - UNIV. FLORIDA
item Damsteegt, Vernon

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 2003
Publication Date: August 1, 2003
Citation: Bralnsky, R.H., Damsteegt, V.D. Vector transmission of the causal agents of citrus variegated chlorosis, huanglongbing and citrus tristeza using endemic and newly established insect species. American Phytopathological Society Abstracts. Presented at Regional Meeting in August, 2003.

Technical Abstract: Citrus variegated chlorosis (CVC), causal agent Xylella fastidiosa (Xf), huanglongbing (HLB) causal agent Liberobacter spp, and exotic stem pitting isolates of citrus tristeza virus (CTV) are not present in the continental U.S. CVC is transmitted by sharpshooter leafhoppers (Homoptera: Cicadellidae,) in Brazil. HLB is transmitted by psyllids (Homoptera: Psyllidae) and stem pitting CTV is transmitted by different aphid species (Homoptera: Aphididae). Recent studies conducted in a BSL3-P containment facility have shown that two sharpshooters (Oncometopia nigricans from Florida and Homalodisca coagulata from California) are able to transmit the CVC pathogen Xf from citrus to citrus. Studies are ongoing with a Florida isolate of the Asian citrus psyllid, Diaphorina citri, as a vector of HLB. Transmission studies with the brown citrus aphid, Toxoptera citricida, have shown that exotic severe stem pitting CTV isolates appear to be preferentially transmitted from plants containing exotic and endemic isolates of CTV.

Last Modified: 4/22/2015
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