Citrus greening disease protection for young trees
Citrus greening disease (Chinese: 黃龍病; pinyin: huánglóngbìng; literally: 'yellow dragon disease'; or HLB) is a disease of citrus caused by a vector-transmitted pathogen. The causative agents are motile bacteria, Candidatus Liberibacter spp. The disease is vectored and transmitted by the Asian citrus psyllid, Diaphorina citri, and the African citrus psyllid, Trioza erytreae, also known as the two-spotted citrus psyllid. It has also been shown to be graft-transmissible. Three different types of HLB are currently known: The heat-tolerant Asian form, and the heat-sensitive African and American forms. The disease was first described in 1929 and first reported in China in 1943. The African variation was first reported in 1947 in South Africa, where it is still widespread. Eventually, it affected the United States, reaching Florida in 2005. Within three years, it had spread to the majority of citrus farms. The rapid increase in this disease has threatened the citrus industry not only in Florida, but the entire US. As of 2009, 33 countries have reported HLB infection in their citrus crop
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Keywords: asian, candidatus, citrus, covers, crop, defender, defenders, disease, diseases, dragon, farm, florida, greening, grove, hlb, liberibacter, management, oranges, prevention, psyllid, screens, tree, trees, usa, yellow, young
