Results 1 to 10 of about 792,268 (149)

Differences in Gene Expression of Pear Selections Showing Leaf Curling or Leaf Reddening Symptoms Due to Pear Decline Phytoplasma [PDF]

Plants, 2022
While host gene expression has been related to symptoms associated with different phytoplasma diseases, it is unknown why some phytoplasmas are associated with different symptoms in genotypes of the same plant species.
Mina Kaviani, Paul H. Goodwin, David M. Hunter   +2 more
doaj   +4 more sources

Pear psylla proven carrier of pear decline virus

California Agriculture, 1964
Recent studies provide very strong evidence that quick decline disease of pears is caused by a virus transmitted by the pear psylla rather than by an insect toxin alone.
D Jensen, W Griggs, C Gonzales, H Schneider   +3 more
doaj   +4 more sources

Transmission of pear decline by grafting

California Agriculture, 1964
Graft transmission studies provide further evidence that quick decline pears is caused by a virus and that, under experimental conditions, it cause the disease in the absence of pear psylla.
T. A. Shalla, T. W. Carroll, Luigi Chiarappa   +2 more
doaj   +4 more sources

Dual biotic stressors shape volatile organic compound emission patterns in pome fruit trees [PDF]

Plant Signaling & Behavior
Plants release volatile organic compounds (VOCs) as part of their defense mechanisms when attacked by phytopathogens and herbivores. These specific volatile emissions can help plants avoid damage.
Ali Karimi, Jannicke Gallinger, Jürgen Gross   +2 more
doaj   +2 more sources

Integrative Longitudinal Study of ‘Candidatus Phytoplasma pyri’ Epidemic Dynamics Using Molecular and Remote Sensing Approaches [PDF]

Microorganisms
Pear decline (PD), associated with ‘Candidatus Phytoplasma pyri’, is one of the most severe diseases affecting pear cultivation in Europe and the United States.
Matilde Tessitori, Antonio Trusso Sfrazzetto, Marika Rossi, Giuseppe Longo-Minnolo, Carmine Marcone, Rosemarie Tedeschi, Cristina Marzachì   +6 more
doaj   +2 more sources

Pear Rootstock Effects on Seasonal Colonization Patterns of Pear Decline Phytoplasma

Horticulturae
Pear decline (PD) phytoplasma populations were examined over one year in non-symptomatic pear trees with HW620 scions grafted onto three different rootstocks: OH×F87 (PD resistant), OH×F69 (PD susceptible), and Bartlett (PD susceptible).
Mina Kaviani, Paul H. Goodwin, David M. Hunter   +2 more
doaj   +3 more sources

Multilocus sequence typing of diverse phytoplasmas using hybridization probe-based sequence capture provides high resolution strain differentiation

Frontiers in Microbiology, 2022
Phytoplasmas are insect-vectored, difficult-to-culture bacterial pathogens that infect a wide variety of crop and non-crop plants, and are associated with diseases that can lead to significant yield losses in agricultural production worldwide ...
Karolina Pusz-Bochenska, Karolina Pusz-Bochenska, Edel Perez-Lopez, Edel Perez-Lopez, Tyler J. Wist, Tyler J. Wist, Harvinder Bennypaul, Daniel Sanderson, Margaret Green, Tim J. Dumonceaux, Tim J. Dumonceaux   +10 more
doaj   +1 more source

Pathogenicity of Stemphylium vesicarium from different hosts causing brown spot in pear [PDF]

, 2009
Stemphylium vesicarium (teleomorph: Pleospora herbarum) is the causal agent of brown spot disease in pear. The species is also able to cause disease in asparagus, onion and other crops. Saprophytic growth of the fungus on plant debris is common.
de Hoog, S., Gerrits van den Ende, B., Kastelein, P., Speksnijder, A., van den Ende, B.G., Speksnijder, A.G.C.L., Goossen-van de Geijn, H., Köhl, J., Goossen-van de Geijn, H.M., Groenenboom-de Haas, B.H., de Hoog, G.S., Hoog, S., de, Ende, B.G., van den, Groenenboom-de Haas, B.   +13 more
core   +1 more source

The Survival of Pear Dormant Buds at Ultra-Low Temperatures

Plants, 2021
Currently, there is a varietal diversity decline in pear orchards of the Czech Republic. Thus, the safe storage of their gene pool collections is becoming increasingly important.
Alois Bilavcik, Milos Faltus, Jiri Zamecnik   +2 more
doaj   +1 more source

Studies on pear decline disease in Uruguay. [abstract of poster].

, 2022
Pear decline (PD) caused by "Candidatus Phytoplasma pyri" (subgroup 16SrX-C of apple proliferation oup of phytoplasmas) is an important pear (Pyrus communis L) disease.
GONCALVEZ, L., FEDERICI, M., MAESO, D., SILVERA, M., MARTINEZ, A.   +4 more
core   +1 more source