Molecular identification of a 16SrIII-B phytoplasma associated with cassava witches’ broom disease

Flôres, Daniela; Haas, I. C. R.; Canale, Maria Cristina; Bedendo, Ivan Paulo

doi:10.1007/s10658-013-0250-3

Cited by 32 publications

(16 citation statements)

References 10 publications

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“…The systemic cassava witches' broom (CWB) is thought to be associated with Candidatus Phytoplasma belonging to 16SrI, 16SrII and 16SIII groups . The disease causes symptoms such as dwarfism, leaf proliferation, shortened internodes and, at times, smaller roots .…”

Section: The Cassava Pest and Disease Complexmentioning

confidence: 99%

“…In stark contrast to the wealth of scientific information on CBB, little is known about CWB. While the disease is assumed to be caused by different phytoplasma strains, and vectored by one or more insect species, key aspects of disease etiology, epidemiology and control remain to be investigated. Once the identity and ecology of CWB vectors have been elucidated, vector management could constitute an effective way of managing this disease and slowing its within‐field spread .…”

Section: Managementmentioning

confidence: 99%

“…94,101 The systemic cassava witches' broom (CWB) is thought to be associated with Candidatus Phytoplasma belonging to 16SrI, 16SrII and 16SIII groups. 17,102,103 The disease causes symptoms such as dwarfism, leaf proliferation, shortened internodes and, at times, smaller roots. 104 CWB is widely distributed in the Americas and SE Asia, and cassava plants with CWB-like symptoms were recently reported from Uganda.…”

Section: Bacterial Diseasesmentioning

confidence: 99%

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Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Graziosi

Minato

Álvarez

et al. 2016

Pest Management Science

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Cassava is a major staple, bio-energy and industrial crop in many parts of the developing world. In Southeast Asia, cassava is grown on >4 million ha by nearly 8 million (small-scale) farming households, under (climatic, biophysical) conditions that often prove unsuitable for many other crops. While SE Asian cassava has been virtually free of phytosanitary constraints for most of its history, a complex of invasive arthropod pests and plant diseases has recently come to affect local crops. We describe results from a region-wide monitoring effort in the 2014 dry season, covering 429 fields across five countries. We present geographic distribution and field-level incidence of the most prominent pest and disease invaders, introduce readily-available management options and research needs. Monitoring work reveals that several exotic mealybug and (red) mite species have effectively colonised SE Asia's main cassava-growing areas, occurring in respectively 70% and 54% of fields, at average field-level incidence of 27 ± 2% and 16 ± 2%. Cassava witches broom (CWB), a systemic phytoplasma disease, was reported from 64% of plots, at incidence levels of 32 ± 2%. Although all main pests and diseases are non-natives, we hypothesise that accelerating intensification of cropping systems, increased climate change and variability, and deficient crop husbandry are aggravating both organism activity and crop susceptibility. Future efforts need to consolidate local capacity to tackle current (and future) pest invaders, boost detection capacity, devise locally-appropriate integrated pest management (IPM) tactics, and transfer key concepts and technologies to SE Asia's cassava growers. Urgent action is needed to mobilise regional as well as international scientific support, to effectively tackle this phytosanitary emergency and thus safeguard the sustainability and profitability of one of Asia's key agricultural commodities. © 2016 Society of Chemical Industry.

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Section: The Cassava Pest and Disease Complexmentioning

confidence: 99%

Section: Managementmentioning

confidence: 99%

Section: Bacterial Diseasesmentioning

confidence: 99%

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Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Graziosi

Minato

Álvarez

et al. 2016

Pest Management Science

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“…The affected plants are unmarketable, ultimately resulting in economic losses for growers. A variety of economic species has been cultivated in this region of the state of São Paulo, and previous studies showed that mainly vegetable crops were affected by diseases associated with phytoplasmas, including eggplant (Amaral-Mello et al 2011), cauliflower (Rappussi et al 2012, broccoli (Eckstein et al 2013) and cassava (Flôres et al 2013). In these cases, although representatives of the 16SrI group have been reported (Eckstein et al 2013), phytoplasmas affiliated with the 16SrIII group were most frequently found in diseased plants.…”

Section: Introductionmentioning

confidence: 98%

“…) and cassava (Flôres et al. ). In these cases, although representatives of the 16SrI group have been reported (Eckstein et al.…”

Section: Introductionmentioning

confidence: 99%

Bougainvillea Shoot Proliferation, a New Disease Induced by Distinct Phytoplasmas

Silva

Flôres

Bedendo

2014

Journal of Phytopathology

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Bougainvillea‐potted plants exhibiting typical phytoplasma‐induced symptoms, characterized by foliar chlorosis, shoot proliferation, leaf and bract deformations, and decline were observed in commercial nurseries, located in the state of São Paulo, Brazil. In this study, PCR assays using group‐specific primers revealed that phytoplasmas affiliated with the groups 16SrI and 16SrIII were associated with symptomatic plants. Molecular analysis based on conventional and virtual RFLP patterns and similarity coefficient calculations identified these phytoplasmas as belonging to subgroups 16SrI‐B and 16SrIII‐B. Phylogenetic analysis confirmed that these phytoplasmas were closely related to representatives of both subgroups. Transmission assays using dodder supported the initial evidence that the symptoms were associated with phytoplasmas.

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Impact and Management of Major Phytoplasma Diseases in Brazil

Bedendo

Lopes

2019

Sustainability in Plant and Crop Protection

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Molecular identification of a 16SrIII-B phytoplasma associated with cassava witches’ broom disease

Cited by 32 publications

References 10 publications

Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Emerging pests and diseases of South‐east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs

Bougainvillea Shoot Proliferation, a New Disease Induced by Distinct Phytoplasmas

Impact and Management of Major Phytoplasma Diseases in Brazil

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