Results 11 to 20 of about 1,545 (189)

Seasonal Patterns of Aster Leafhopper (Hemiptera: Cicadellidae) Abundance and Aster Yellows Phytoplasma Infectivity in Wisconsin Carrot Fields [PDF]

Environmental Entomology, 2013
In Wisconsin, vegetable crops are threatened annually by the aster yellows phytoplasma (AYp), which is obligately transmitted by the aster leafhopper. Using a multiyear, multilocation data set, seasonal patterns of leafhopper abundance and infectivity were modeled.
K E, Frost, P D, Esker, R, Van Haren, L, Kotolski, R L, Groves   +4 more
openaire   +4 more sources

Factors Influencing Aster Leafhopper (Hemiptera: Cicadellidae) Abundance and Aster Yellows Phytoplasma Infectivity in Wisconsin Carrot Fields [PDF]

Environmental Entomology, 2013
In Wisconsin, vegetable crops are threatened annually by infection of the aster yellows phytoplasma (AYp), the causal agent of aster yellows (AY) disease, vectored by the aster leafhopper, Macrosteles quadrilineatus Forbes. Aster leafhopper abundance and infectivity are influenced by processes operating across different temporal and spatial scales.
K E, Frost, P D, Esker, R, Van Haren, L, Kotolski, R L, Groves   +4 more
openaire   +4 more sources

Detection of aster yellows phytoplasma in false flax based on PCR and RFLP

Microbiological Research, 2001
False flax (Camelina sativa L.) plants were found to be infected with a yellows-type disease caused by a phytoplasma in experimental plots at the Edmonton Research station. Alberta, Canada. Typical phytoplasmas were detected in the phloem cells in ultrathin sections from leaf midrib tissues examined by electron microscopy.
Khadhair, A.-H., Tewari, J.P., Howard, R.J., Paul, V.H.   +3 more
exaly   +6 more sources

Genetic Variation Among Geographically Disparate Isolates of Aster Yellows Phytoplasma in the Contiguous United States. [PDF]

J Econ Entomol, 2020
Clements J, Garcia M, Bradford B, Crubaugh L, Piper S, Duerr E, Zwolinska A, Hogenhout S, Groves RL.   +8 more
europepmc   +2 more sources

Jujube Witches' Broom Phytoplasma Effectors SJP1/2 Manipulate the ZjTCP2-ZjTCP1 Cascade to Repress Leaf Cell Proliferation in Jujube. [PDF]

Mol Plant Pathol
SJP1 and SJP2, two effectors secreted by JWB phytoplasmas, inhibit jujube leaf cell proliferation through manipulating a cascade involving ZjTCP2 and ZjTCP1, two TCP transcription factors from distinct subfamilies. ABSTRACT Leaf development into the final size is spatiotemporally regulated by cell proliferation and expansion. The jujube witches' broom (
Zheng Y, Ma F, Ren Y, Si J, Zhang W, Deng M, Zhou J, Zhang S, Zhang N, Sun Q, Sun J.   +10 more
europepmc   +2 more sources

A witches' broom phytoplasma effector induces stunting by stabilizing a bHLH transcription factor in Ziziphus jujuba plants. [PDF]

New Phytol
Summary Phytoplasmas are specialized phloem‐limited bacteria that cause diseases on various crops, resulting in significant agricultural losses. This research focuses on the jujube witches' broom (JWB) phytoplasma and investigates the host‐manipulating activity of the effector SJP39.
Yang S, Lovelace AH, Yuan Y, Nie H, Chen W, Gao Y, Bo W, Nagel DH, Pang X, Ma W.   +9 more
europepmc   +2 more sources

Comparing qPCR and Nested PCR Diagnostic Methods for Aster Yellows Phytoplasma in Aster Leafhoppers [PDF]

Plant Disease, 2016
The aster yellows phytoplasma (AYp) is a wall-less bacterium that causes damage in multiple crops. They are spread primarily by the aster leafhopper, Macrosteles quadrilineatus (Hemiptera: Cicadellidae). A total of 3,156 aster leafhoppers were collected during the 2014 and 2015 growing seasons in Michigan celery and carrot fields using sweep nets. The
Katherine L, Demeuse, Ari S, Grode, Zsofia, Szendrei   +2 more
openaire   +2 more sources

Detection and molecular identification of 'Candidatus Phytoplasma asteris' associated with muscari virescence of three grape hyacinth species

Plant Protection Science, 2023
Grape hyacinths are popular perennial, flowering bulbous plants. In 2018, 2019, and 2020, some plants of three Muscari species showed symptoms similar to those associated with phytoplasma infection in commercial ornamental gardens in Hungary.
Emese Mergenthaler, József Fodor, János Ágoston, Orsolya Viczián   +3 more
doaj   +1 more source

Genetic variability among isolates of Coconut lethal yellowing phytoplasmas determined by heteroduplex mobility assay (HMA) [PDF]

, 2008
Heteroduplex mobility assay (HMA) was used to determine genomic diversity among African isolates of coconut lethal yellowing phytoplasmas causing Cape St.
Dollet, Michel, Fabre, Sandrine, Marinho, Vera Lucia A.   +2 more
core   +2 more sources

First Report of Aster Yellows Phytoplasma in Alfalfa

Plant Disease, 1999
Samples of alfalfa (Medicago sativa L.) leaves and stems showing symptoms of inter-veinal chlorosis and purpling, commonly associated with insect feeding, were collected from 8 sites in central and southern Wisconsin in autumn of 1998. Samples were frozen within 24 h of collection.
R D, Peters, M E, Lee, C R, Grau, S J, Driscoll, R M, Winberg, N C, Kurtzweil, L A, Lukaesko, I-M, Lee   +7 more
openaire   +2 more sources