| a review of techniques for detecting huanglongbing (greening) in citrus. | huanglongbing (hlb) is the most destructive disease of citrus worldwide. monitoring of health and detection of diseases in trees is critical for sustainable agriculture. hlb symptoms are virtually the same wherever the disease occurs. the disease is caused by candidatus liberibacter spp., vectored by the psyllids diaphorina citri kuwayama and trioza erytreae. electron microscopy was the first technique used for hlb detection. nowadays, scientists are working on the development of new techniques ... | 2016 | 27590666 |
| the phloem-sap feeding mealybug (ferrisia virgata) carries 'candidatus liberibacter asiaticus' populations that do not cause disease in host plants. | 'candidatus liberibacter asiaticus' (las) is the primary causal agent of huanglongbing (hlb), the most devastating disease of citrus worldwide. there are three known insect vectors of the hlb-associated bacteria, and all are members of the hemiptera: diaphorina citri (psyllidae), trioza erytreae (triozidae), and cacopsylla (psylla) citrisuga (psyllidae). in this study, we found that another hemipteran, the striped mealybug ferrisia virgata (cockerell) (hemiptera: pseudococcidae), was able to acq ... | 2014 | 24465578 |
| candidate gene markers for candidatus liberibacter asiaticus for detecting citrus greening disease. | citrus huanglongbing (hlb) also known as citrus greening is one of the most devastating diseases of citrus worldwide. the disease is caused by candidatus liberibacter bacterium, vectored by the psyllid diaphorina citri kuwayama and trioza erytreae del guercio. citrus plants infected by the hlb bacterium may not show visible symptoms sometimes for years following infection. the aim of this study was to develop effective gene-specific primer pairs for polymerase chain reaction based method for qui ... | 2013 | 23660656 |
| a novel subspecies of 'candidatus liberibacter africanus' found on native teclea gerrardii (family: rutaceae) from south africa. | the phloem limited bacterium 'candidatus liberibacter africanus' is associated with citrus greening disease in south africa. this bacterium has been identified solely from commercial citrus in africa and the mascarene islands, and its origin may lie within an indigenous rutaceous host from africa. recently, in determining whether alternative hosts of laf exist amongst the indigenous rutaceous hosts of its triozid vector, trioza erytreae, three novel subspecies of laf were identified i.e. 'candid ... | 2017 | 27830472 |
| three novel lineages of 'candidatus liberibacter africanus' associated with native rutaceous hosts of trioza erytreae in south africa. | greening disease of citrus in south africa is associated with 'candidatus liberibacter africanus' (laf), a phloem-limited bacterium vectored by the sap-sucking insect trioza erytreae (triozidae). despite the implementation of control strategies, this disease remains problematic, suggesting the existence of reservoir hosts to laf. the current study aimed to identify such hosts. samples from 234 trees of clausena anisata, 289 trees of vepris lanceolata and 231 trees of zanthoxylum capense were col ... | 2015 | 25395434 |
| dna barcode reference library for the african citrus triozid, trioza erytreae (hemiptera: triozidae): vector of african citrus greening. | citrus (citrus spp.) production continues to decline in east africa, particularly in kenya and tanzania, the two major producers in the region. this decline is attributed to pests and diseases including infestation by the african citrus triozid, trioza erytreae (del guercio) (hemiptera: triozidae). besides direct feeding damage by adults and immature stages, t. erytreae is the main vector of 'candidatus liberibacter africanus', the causative agent of greening disease in africa, closely related t ... | 2017 | 29045665 |