Special Issue "Phloem Localized Insect Transmitted Bacteria Associated with Plant Diseases"

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Plant Microbe Interactions".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 1395

Special Issue Editor

Department of Agricultural and Food Sciences, Alma Mater Studiorum — University of Bologna, 40127 Bologna, Italy
Interests: bacteria; phytoplasmas; plant diseases; detection; epidemiology

Special Issue Information

Dear Colleagues,

Insect-vectored bacterial diseases of plants are emerging threats to crops and forestry worldwide. Psyllid-vectored liberibacters and insect-vectored phytoplasmas are associated with epidemic diseases that can have a devastating impact on the economy.

A detailed description of these bacteria and of their epidemiology and geographic distribution can help us to improve our knowledge and awareness of these diseases, which can be beneficial for various groups, including academics and agricultural extension service officers.

In this Special Issue, we will focus on the management of these diseases, grouped according to the main associated bacterium, aimed at reducing losses. A preliminary, tentative list of these diseases includes aster yellows and other yellows, fruit tree and palm decline and yellowing, “stolbur”, “bois noir”,“huanglongbing”, potato purple top, and zebra chips. Papers should report on the detection and identification of the insect-transmitted bacteria associated with these diseases, as well as their insect vectors, plant hosts, epidemiology, and management where available.

Dr. Assunta Bertaccini
Guest Editor

Manuscript Submission Information

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  • phytopathogenic bacteria
  • Candidatus Phytoplasma’ species
  • Candidatus Liberibacter’ species and subspecies
  • plant disease
  • prevention
  • management
  • detection
  • identification
  • insect vectors

Published Papers (2 papers)

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2 pages, 177 KiB  
Phloem-Localized Insect-Transmitted Bacteria Associated with Plant Diseases
Microorganisms 2023, 11(10), 2494; https://doi.org/10.3390/microorganisms11102494 - 05 Oct 2023
Viewed by 661
In the last three decades, an increasing number of plant diseases associated with the presence of phloem-localized insect-transmitted bacteria have been observed around the world, causing serious economic losses [...] Full article


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17 pages, 1161 KiB  
Risk Assessment for the Spread of Flavescence Dorée-Related Phytoplasmas from Alder to Grapevine by Alternative Insect Vectors in Germany
Microorganisms 2023, 11(11), 2766; https://doi.org/10.3390/microorganisms11112766 - 14 Nov 2023
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“Flavescence dorée” (FD)-related phytoplasmas are widespread in alder in Germany and their transmission to grapevine represents a high risk for FD outbreaks when the primary vector, Scaphoideus titanus, becomes present in the future. Therefore, the potential role of the Deltocephalinae leafhopper species [...] Read more.
“Flavescence dorée” (FD)-related phytoplasmas are widespread in alder in Germany and their transmission to grapevine represents a high risk for FD outbreaks when the primary vector, Scaphoideus titanus, becomes present in the future. Therefore, the potential role of the Deltocephalinae leafhopper species in transmitting FD-related phytoplasmas from alder to grapevine was studied in extensive transmission trials conducted between 2017 and 2020. The transmission capacity of autochthonous Allygus spp. and the invasive Orientus ishidae captured on infected alder trees was tested under controlled conditions using various test designs, including grouped insects and single-insect studies. The latter experiments were analyzed in terms of survival probability, transmission success and phytoplasma load in the insects, measured by quantitative PCR. A minimum inoculation titer (MIT) required for successful transmission to alder was defined for both Allygus spp. and O. ishidae. While Allygus spp. exhibited slightly better survival on Vitis vinifera compared to O. ishidae, the latter displayed higher phytoplasma loads and greater transmission success. Although all species were capable of infecting alder seedlings, O. ishidae was able to transmit 16SrV-phytoplasmas directly to single grapevines. Infective adults of O. ishidae were captured from the beginning of July until the end of August, while Allygus spp. were only considered infective towards the end of the season. Thus, O. ishidae likely poses a higher risk for FD transmission from alder to grapevine, albeit at a very low level, as only five out of 90 transmission trials to V. vinifera were successful. Full article
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