| (a) Quarantined pest is citrus greening. The department
finds that citrus greening, "Candidatus Liberibacter
asiaticus," is a dangerous plant disease that is not widely distributed
in this state.
(b) Description of dangerous plant disease. Host plants.
Citrus greening is a dangerous plant disease that can infect and be
carried by all plant parts (including leaves and propagative seeds)
except fruit of Aegle marmelos, Aeglopsis
chevalieri, Afraegle gabonensis, A. paniculata, Amyris madrensis,
Atalantia spp. (including Atalantia
monophylla), Balsamocitrus dawei, Bergera; (= Murraya) koenigii, Calodendrum capense, Choisya
ternata, C. arizonica, X Citroncirus
webberi, Citropsis articulata, Citropsis gilletiana, Citrus madurensis (=
X Citrofortunella microcarpa), Citrus spp., Clausena anisum-olens, C. excavata, C. indica,
C. lansium, Eremocitrus glauca, Eremocitrus hybrid, Esenbeckia berlandieri, Fortunella spp., Limonia acidissima, Merrillia caloxylon, Microcitrus
australasica, M. australis, M. papuana, X Microcitronella spp.,
Murraya spp., Naringi crenulata, Pamburus
missionis, Poncirus trifoliata, Severinia buxifolia, Swinglea glutinosa,
Tetradium ruticarpum, Toddalia asiatica, Triphasia trifolia, Vepris (= Toddalia) lanceolata, and Zanthoxylum fagara. A majority of these
plants also are hosts of Asian citrus psyllid Diaphorina
citri, the vector of citrus greening in the United States.
Citrus greening is a bacterial disease that attacks the vascular system
of plants. Once infected, there is no cure for a tree with citrus
greening disease. In areas of the world where citrus greening is endemic,
citrus trees decline and die within a few years. Citrus greening is
considered a serious disease by the United States Department of Agriculture
(USDA) as well as many states.
(c) Establishment of quarantine. The department is
authorized by the Texas Agriculture Code, §71.002, to establish
a quarantine against the dangerous plant disease, citrus greening,
identified in this section.
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