Results 21 to 30 of about 1,545 (189)

Identification of phytoplasma strains associated with witches’ broom and yellowing in Ziziphus jujube nurseries in Iran

Phytopathologia Mediterranea, 2020
Phytoplasma symptoms, including proliferation, witches’ broom, leaf rolling and yellowing, were observed in jujube (Ziziphus jujube) nurseries in the East of Iran.
Ghobad BABAEI, Seyyed Alireza ESMAEILZADEH-HOSSEINI, Mahbobeh ZANDIAN, Vahid NIKBAKHT   +3 more
doaj   +1 more source

Molecular identification of ‘Candidatus Phytoplasma palmicola’ associated with coconut lethal yellowing in Equatorial Guinea

Annals of Applied Biology, Volume 183, Issue 3, Page 262-270, November 2023., 2023
A high mortality of coconut palms was observed in the coastal areas of Equatorial Guinea. Molecular analyses on 16S rRNA and secA genes detected ‘Candidatus Phytoplasma palmicola’ subgroup 16SrXXII‐A. Strict monitoring and surveillance procedures for early detection of the pathogen are strongly recommended to reduce its impact and further spread in the
Assunta Bertaccini, Nicoletta Contaldo, Giulia Feduzi, Agustín Mane Ela Andeme, Egya Ndede Yankey, Luciano Rovesti   +5 more
wiley   +1 more source

Refinement of the taxonomic structure of 16SrXI and 16SrXIV phytoplasmas of gramineous plants using multilocus sequence typing [PDF]

, 2016
Phytoplasmas that infect gramineous plants, including Napier grass stunt, sugarcane whiteleaf, sugarcane grassy shoot, and Bermuda grass whiteleaf, have been classified into two closely related groups, 16SrXI and 16SrXIV, based on the 16S ribosomal RNA ...
Chamini Kanatiwela-de Silva, Doyle J. J., Gundersen D. E., Kanjana Warawichanee, Matt Dickinson, Naofel Aljafar, Perera L., Praphat Kawicha, Preethi Udagama, Pushpa Damayanthi Abeysinghe, Saman Abeysinghe   +10 more
core   +2 more sources

Commodity risk assessment of Quercus robur plants from the UK

EFSA Journal, Volume 21, Issue 10, October 2023., 2023
Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High‐risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Quercus robur imported from the UK as:
EFSA Panel on Plant Health (PLH), Claude Bragard, Paula Baptista, Elisavet Chatzivassiliou, Francesco Di Serio, Josep Anton Jaques Miret, Annemarie Fejer Justesen, Alan MacLeod, Christer Sven Magnusson, Panagiotis Milonas, Juan A Navas‐Cortes, Stephen Parnell, Roel Potting, Philippe Lucien Reignault, Emilio Stefani, Hans‐Hermann Thulke, Wopke Van der Werf, Antonio Vicent Civera, Jonathan Yuen, Lucia Zappalà, Andrea Battisti, Hugo Mas, Daniel Rigling, Massimo Faccoli, Giovanni Iacopetti, Alžběta Mikulová, Olaf Mosbach‐Schulz, Fabio Stergulc, Franz Streissl, Paolo Gonthier   +29 more
wiley   +1 more source

Molecular characterisation of phytoplasmas infecting roses in Poland

Acta Agrobotanica, 2013
Symptoms of shoot dieback and leaf yellowing followed by leaf chlorosis were observed in naturally infected roses 'Frisco' and 'Suela', cultivated in a commercial greenhouse in Poland.
Hanna Śliwa, Tadeusz Malinowski, Maria Kamińska   +2 more
doaj   +1 more source

First Report of Aster Yellow Phytoplasmas (‘Candidatus Phytoplasma asteris’) in Canadian Grapevines

Plant Disease, 2009
In North America, elm yellows, aster yellows (AY), and X-disease phytoplasmas have been detected in American grapevines (1), and recently, Bois noir was detected in Canadian vineyards from British Columbia (BC) and Ontario (ON) (2). Typical symptoms of grapevine yellows (GY) include leaf rolling and chlorosis, uneven or total lack of lignification of ...
C Y, Olivier, D T, Lowery, L W, Stobbs, C, Vincent, B, Galka, J, Saguez, L, Bittner, R, Johnson, M, Rott, C, Masters, M, Green   +10 more
openaire   +2 more sources

Weed hosts of phytoplasmas in the Czech Republic

Plant Protection Science, 2002
The research was focused on wild plants that represent possible sources of phytoplasma infection. Thirteen species of wild herbaceous plants with symptoms of shoot proliferation, phyllody, virescence, sterility or yellowing have been collected from ...
P. Válová, R. Fialová, M. Navrátil, J. Fránová, M. Šimková, J. Nebesářová   +5 more
doaj   +1 more source

Molecular characterization of a phytoplasma causing phyllody in clover and other herbaceous hosts in northern Italy [PDF]

, 1996
Red clover (Trifolium pratense) and Ladino clover (Trifolium repens) plants showing phytoplasma-associated symptoms (yellowing/reddening, virescence and phyllody) have been recovered in Friuli-Venezia Giulia, Italy.
Carraro L, Firrao G, GOBBI E., Locci R
core   +1 more source

Detection and molecular characterization of phytoplasmas infecting apple trees in Poland

Horticultural Science, 2014
During 2010-2012, samples from 225 apple trees growing in six regions of Poland were tested for phytoplasmas. 16S rRNA gene and 16S-23S spacer region sequences were amplified from total DNAs prepared from phloem tissue of apple shoots.
M. Cieślińska, D.E. Kruczyńska
doaj   +1 more source

Purple Coneflower Is a Host of the Aster Yellows Phytoplasma

Plant Disease, 1997
The perennial plant purple coneflower (Echinacea purpurea (L.) Moench, Asteraceae) is native to open woods and prairies of the eastern U.S. and is gaining popularity as a garden and roadside ornamental. It is propagated both by seed and by division of established plant crowns. During late summer 1996, three of seven purple coneflower plants located in
G R, Stanosz, M F, Heimann, I-M, Lee
openaire   +2 more sources