Orosius Lotophagorum Subsp. Ryukyuensis (Hemiptera: Cicadellidae), a New Vector of a Little Leaf Disease in Australia.

Behncken, G. M.

doi:10.1071/app9840035

Cited by 10 publications

(6 citation statements)

References 5 publications

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“…The common brown leafhopper Orosius argentatus (Evans) is a vector of the TBB phytoplasma in tomato (Hill, 1943), several legume species (Hill, 1943; Hutton and Grylls, 1956), and lucerne (Hill and Helson, 1949). Orosius lotophagorum is also a vector of little leaf disease (Behncken, 1984). As leafhopper vectors and alternate hosts of phytoplasmas infecting papaya are unknown, little is known about their epidemiology.…”

Section: Introductionmentioning

confidence: 99%

Epidemiology of Phytoplasma Diseases in Papaya in Northern Australia

Padovan

Gibb

2001

Journal of Phytopathology

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Using molecular tools, the spread of phytoplasma diseases in a papaya plantation was investigated for 3 years to identify phytoplasma strains affecting papaya, insect vectors and alternative plant hosts. Five phytoplasma strains (SPLL‐V4, TBB, CaWB, StLL and WaLLvar) were associated with papaya yellow crinkle disease and one phytoplasma strain (PDB) was associated with papaya dieback disease. The most prevalent strains were TBB and SPLL‐V4 which occurred in 94% of infected papaya. There was a significant correlation between phyllody and TBB, and virescence and SPLL‐V4, although other phytoplasma types could also be associated with either phyllody or virescence. No mixed infections were detected in diseased papaya. Disease progress curves for TBB and SPLL‐V4 showed a sigmoid response reaching a maximum disease incidence of 16% after 24 months. The rate of disease spread was best described by a logistic model which showed that TBB spread at a slightly higher rate than SPLL‐V4. Ten phytoplasma strains were detected in 14 alternative plant species; however, TBB and SPLL‐V4 were present in only a few individual plants of some of these species, so these alternative hosts would probably not have provided a significant infection source to papaya. Very few phytoplasmas were detected in leafhoppers collected over 3 years with TBB and SPLL‐V4 only detected in Orosius spp.

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Section: Introductionmentioning

confidence: 99%

Epidemiology of Phytoplasma Diseases in Papaya in Northern Australia

Padovan

Gibb

2001

Journal of Phytopathology

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“…However,Marwitz et al ( 1984 ) observed virescence and phyllody in Primula denticulata and P. vulgaris in Germany, whileBehncken ( 1984 ) reported a new vector of a little-leaf disease in Ipomoea in Australia Sharma et al ( 1985 ). described phyllody of marigold in India Hiruki and Rocha ( 1986 ).…”

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confidence: 99%

Plant, Soil and Microbes

2016

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“…Similarly, Ulrychova et al ( 1983 ) observed yellows-type disease in Czech Republic. However, Marwitz et al ( 1984 ) observed virescence and phyllody in Primula denticulata and P. vulgaris in Germany, while Behncken ( 1984 ) reported a new vector of a little-leaf disease in Ipomoea in Australia. Sharma et al ( 1985 ) described phyllody of marigold in India.…”

Section: Diseases In Chinese Astermentioning

confidence: 95%

Occurrence, Distribution, and Molecular Identification of Phytoplasma-associated Diseases in Ornamental Plants

Khan¹,

Ahmad²,

Akhtar³

2016

Plant, Soil and Microbes

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Phytoplasma is recognized as the serious constraints for the many economically ornamental plants all around the world. It may reduce the quality and yield of ornamental plants and is recognized internationally because of its unspecifi c symptoms, severe losses, and diverse epidemiology. The epidemics of these diseases have compelled the withdrawal of many ornamental plant species such as gladiolus, lily, chrysanthemum, and rose from cultivation. So far, more than 42 ornamental plant species were reported as infected by phytoplasma. The general symptom includes fl ower malformation, growth abnormalities, yellowing or decline of leaves, elongation and etiolation of internodes, witches' broom, stunting, little leaf, and virescence. The knowledge on the diversity and identifi cation of phytoplasma has been explored with the molecular tools and techniques showing that phytoplasma infecting the ornamental plant Candidatus Phytoplasma asteris belongs to a major 16Srl group. The other known groups of phytoplasmas are 16Srll, 16Srlll, 16SrV, 16SrVl, 16SrVll, 16SrlX, 16SrX, 16SrXll, 16SrXlll, and 16SrXV. For the detection of phytoplasma in the infected plant parts or tissues, the 16S rRNA gene fragments were amplifi ed using phytoplasma universal primer pairs P1/P7 in a polymerase chain reaction (PCR) followed by primer pairs R16F2n/R16R2 in the nested PCR. Nevertheless, for the fi ner detection of phytoplasma-related Candidatus Phytoplasma asteris, DNA samples were used to extend the RP and Tuf gene fragments by PCR using aster yellows group-specifi c primer pairs RP(l)F1A/RP(l)R1A and fTufAy/rTufAy, respectively. However, the restriction fragment length polymorphism (RFLP) analysis of RP gene fragments digested with Alul, Msel, and Tsp5091 restriction enzymes indicates the presence of aster yellows group. The aim of the present chapter is to provide an overview of the phytoplasma-associated diseases in ornamental plants, their mode of transmission, and the molecular techniques employed to detect the phytoplasma in the infected plant parts or tissues.

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Orosius Lotophagorum Subsp. Ryukyuensis (Hemiptera: Cicadellidae), a New Vector of a Little Leaf Disease in Australia.

Cited by 10 publications

References 5 publications

Epidemiology of Phytoplasma Diseases in Papaya in Northern Australia

Epidemiology of Phytoplasma Diseases in Papaya in Northern Australia

Plant, Soil and Microbes

Occurrence, Distribution, and Molecular Identification of Phytoplasma-associated Diseases in Ornamental Plants

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