scholarly journals Development of Spectral Disease Indices for ‘Flavescence Dorée’ Grapevine Disease Identification

Sensors ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 2772 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Flavescence Dorée ◽  
Disease Identification ◽  
Grapevine Disease

scholarly journals Detection of Flavescence dorée Grapevine Disease Using Unmanned Aerial Vehicle (UAV) Multispectral Imagery

2017 ◽  
Vol 9 (4) ◽  
pp. 308 ◽  
Author(s):  
Johanna Albetis ◽  
Sylvie Duthoit ◽  
Fabio Guttler ◽  
Anne Jacquin ◽  
Michel Goulard ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Multispectral Imagery ◽  
Flavescence Dorée ◽  
Aerial Vehicle ◽  
Grapevine Disease

scholarly journals Competitive Exclusion of Flavescence dorée Phytoplasma Strains in Catharanthus roseus Plants

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1594
Author(s):  
Marika Rossi ◽  
Marta Vallino ◽  
Luciana Galetto ◽  
Cristina Marzachì
Keyword(s):  
Catharanthus Roseus ◽  
Competitive Exclusion ◽  
Flavescence Dorée ◽  
Environmentally Sustainable ◽  
Sustainable Solutions ◽  
Diagnostic Protocol ◽  
Cultivable Bacteria ◽  
Unique Strain ◽  
Reference Strains ◽  
Grapevine Disease

Flavescence dorée phytoplasmas (FDp, 16SrV-C and -D) are plant pathogenic non-cultivable bacteria associated with a severe grapevine disease. The incidence of the two reference strains on cultivated grapevines is unbalanced, and mixed infections are rare. To investigate the interaction between the two strains, Catharanthus roseus plants were graft-infected with both strains, either simultaneously or sequentially. Different combinations of lateral and apical grafting were applied to avoid possible benefits due to graft position. The infection was monitored for four months through a new diagnostic protocol developed for differentiation and relative quantification of the two strains. Regardless of the temporal or spatial advantage at grafting, FD-C generally outcompeted FD-D. The prevalence of FD-C increased over time and, at the end of the experiment, FD-C was the unique strain detected in the aerial part and the roots of 74% and 90% of grafted plants, respectively. These data indicate that the interaction between the two strains results in competitive exclusion. Understanding the bases of the competition between FD-C and FD-D may contribute to explain the biology of the coexistence of different FDp strains under field conditions, aiming at identifying potential suppressor strains, which can provide alternative and environmentally sustainable solutions for FD control.

scholarly journals Recovery from Grapevine Flavescence Dorée in Areas of High Infection Pressure

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1479
Author(s):  
Matteo Ripamonti ◽  
Davide Pacifico ◽  
Chiara Roggia ◽  
Sabrina Palmano ◽  
Marika Rossi ◽  
...  
Keyword(s):  
Management Strategies ◽  
Spontaneous Remission ◽  
Wine Quality ◽  
Wine Production ◽  
Flavescence Dorée ◽  
Infection Pressure ◽  
Scaphoideus Titanus ◽  
High Infection ◽  
Sensory Analyses ◽  
Grapevine Disease

Flavescence dorée (FD) is a quarantine grapevine disease caused by a phytoplasma transmitted by the leafhopper Scaphoideus titanus Ball. FD management relies on compulsory insecticide treatments, roguing of infected plants, and substitution with certified material. Some grapevine cultivars show a spontaneous remission of symptoms (recovery). To determine if recovery is a suitable strategy to co-exist with disease in areas of strong infestation, the qualitative aspects of grapes, musts, and wines obtained from recovered Barbera and Chardonnay grapevines were investigated in two productive vineyards. Following field observations, about 1500 plants in each vineyard were divided into healthy (asymptomatic and negative in phytoplasma molecular diagnosis) and recovered (asymptomatic the year of observation but infected the year before). Maturation curves and microvinification tests followed by oenological and sensory analyses showed that maturation trends of recovered grapes were in line with those from healthy plants and the final qualities of wines were comparable. The spread of FD has strongly increased in Piedmont (Italy) in recent decades. Management strategies to cope with the disease are necessary to preserve traditional wine production. Despite the yield from recovered grapevines is quantitatively lower than that from healthy ones, we showed here that the wine quality is, however, preserved.

scholarly journals Acquisition capability of the grapevine Flavescence dorée by the leafhopper vector Scaphoideus titanus Ball correlates with phytoplasma titre in the source plant

2014 ◽  
Vol 87 (4) ◽  
pp. 671-679 ◽  
Author(s):  
Luciana Galetto ◽  
Dimitrios Miliordos ◽  
Chiara Roggia ◽  
Mahnaz Rashidi ◽  
Dario Sacco ◽  
...  
Keyword(s):  
Leafhopper Vector ◽  
Flavescence Dorée ◽  
Scaphoideus Titanus ◽  
Source Plant
Sign in / Sign up

Export Citation Format

Share Document