Background, Current situation and management of the HLB and its ...

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As 1-16 16 years old mandarin trees were graft inoculated in September, most of the trees shown symptoms on the inoculated branch in 7-9 9 months after inoculation (Lin, 1963).
The graft transmissibility and the HLB incidence of the progeny plants of a diseased tree is variable and never reaches 100% (Lin, 1956; Kao et al.,1963; Zhao et al., 1982). It shows that the distribution of the pathogen in host plant might be uneven.
Page 1 and 2: 2nd International Workshop on Citru
Page 3 and 4: 1. Distribution and importance 2. S
Page 5 and 6: Citrus Cultivation and HLB Occurren
Page 7 and 8: In 1980’, there was an apparent n
Page 9 and 10: HLB Occurrence and Psyllid Distribu
Page 11 and 12: In the area where citrus had not be
Page 13 and 14: Symptom
Page 15: “Yellow shoot” shown in the ini
Page 24: Most fruits of the diseased tree dr
Page 29 and 30: New root growth is suppressed and t
Page 31 and 32: Several causes of HLB have been sug
Page 33 and 34: In the early 1960’, there was a d
Page 35: Tetracyclin sensitivity of the caus
Page 40 and 41: Afterwards, the results of PCR test
Page 42 and 43: Some characteristics of HLB in graf
Page 46 and 47: Graft transmissibility influenced b
Page 48 and 49: No. plants diseased/ Grafting seaso
Page 50 and 51: Heat sensitivity
Page 52 and 53: Lo (1983) reported that budwoods co
Page 54 and 55: The transmission of HLB by citrus p
Page 56 and 57: Young seedlings could be infected b
Page 58 and 59: The relation between HLB prevalence
Page 60 and 61: A survey of 27 counties in Guangxi
Page 62 and 63: A survey conducted in 1977 in the f
Page 64 and 65: Before 1980’, in order to increas
Page 66 and 67: In the general survey, all of the v
Page 68 and 69: 1. Quarantine. HLB was defined as a
Page 70 and 71: 3. Producing and planting HLB free
Page 72 and 73: The exclusion of HLB by shoot shoot
Page 74 and 75: 5. Remove diseased plants plants. R
Page 76 and 77: Yangcun Citrus Farm was the biggest
Page 78 and 79: Since 1974 1974, , leaf rollers and
Page 80 and 81: Since 1993 1993, , the management s
Page 82: Thank you for your attention!

Background, Current situation and management of the HLB and its ...

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