Cristina Cabaleiro

• Ph D
• Professor at University of Santiago de Compostela

Protected geographical indications (PGIs) share health problems related to plant propagation material. The PGI “Faba de Lourenzá” encompasses a 1660 km² area in northern Galicia, Spain, renowned for its “Faba Galaica” (FG) and Faba do marisco” (FM) bean cultivars. The lack of certified virus-free seeds poses a challenge. From 2019 to 2023, seeds fr...

Grapevine leafroll disease (GLD) is caused by one or more of the Grapevine leafroll-associated viruses (GLRaVs). GLD’s symptoms are expected to be evident in indicator cultivars, regardless of the GLRaV(s) involved. In the present study, disease incidence (I) and severity (S), symptoms before veraison (Sy < V), a disease severity index (DSI) and an...

The mealybug Planococcus ficus is one of the main vectors of Grapevine leafroll associated virus-3 (GLRaV-3), which was commonly detected in cv “Albariño” planting material before certified stock was available. Mealybug infestations were rare in vineyards in southern Galicia (NW Spain) during the 1990s (2.2% of the vineyards surveyed) and are still...

Beside the well-known fungal pathologies, grapevine virus diseases are of major importance in grapegrowing areas, also due to the limited knowledge by the professionals of the sector. To face this problem, the PAThOGEN training program was developed, with the aims of: (i) building a high-quality Vocational and Education Training program, (ii) impro...

The detrimental effects of grapevine leafroll disease (GLD) have been documented mainly in young plantsand little data is available on infected grapevines when they reach maturity. This study examined theinfluence of the rootstock on the effect of GLRaV-3 in a 20-year-old Vitis vinifera cv Albariño vineyard inwhich the virus has been spread by Plan...

The sanitary condition of the vineyard is, on several occasions, a factor that limits yield and quality of the vine and wine production, an activity of great importance for many regions across all vineyard regions in the world. The 'grapevine leafroll', as a viral disease, affects the vines and is responsible for significant economic losses. The ca...

Potato common scab (CS) is an important crop problem worldwide. Previously, Streptomyces europaeiscabies has been considered as a predominant pathogen in the west European region. Potato (Solanum tuberosum) samples having visible CS symptoms were collected from Galicia, Spain, during 2015. Potato samples were heavily infected with CS symptoms from...

Common scab (CS) is caused by gram positive, soilborne, filamentous Actinobacteria in the genus Streptomyces. Potato common scab is very prevalent in the potato growing region of Pakistan (Anwar et al. 2013). In this study, 14 CS-infected potato samples were collected from three different potato growing fields of Punjab, Pakistan, during 2015. The...

Grapevine leafroll-associated virus 3 (GLRaV-3; Ampelovirus, Closteroviridae) isolates from Galicia in north-western Spain were selected to characterize their genetic diversity according to different factors (age, origin, location, variety, etc.). The vines belonged either to local white and red varieties autochthonous from Galicia or to varieties...

Leafroll disease symptoms in grapevine white varieties are milder than in red ones and producers do not regard leafroll to be economically significant especially when yield is not consistently affected. However, the potential alcoholic degree (PAD) of Albariño grapes from Grapevine leafroll associated virus 3 (GLRaV-3) infected plants in two vineya...

Leafroll disease symptoms in grapevine white varieties are milder than in red ones and producers do not regard leafroll to be economically significant especially when yield is not consistently affected. However, the potential alcoholic degree (PAD) of Albariño grapes from Grapevine leafroll associated virus 3 (GLRaV-3) infected plants in two vineya...

The aim of this paper is to determine whether training level affects the safe use of pesti-cides amongst pesticide applicators of Galician greenhouse farms (Spain). The rela-tionship between pesticide applicator training and safe use of pesticides was statisti-cally analyzed using non-parametric tests. Results did not reveal any relationship be-twe...

The effect of leaf removal treatments around vine cluster zones on must quality were tested during 2003 and 2004 in Rfas Baixas (Spain) in two Albarino vineyards infected by GLRaV-3. As expected, the main virus damage was decreased sugar content (2.1 Brix in 2003 and 0.9 Brix in 2004) in the musts compared with leafroll-free plants. Leaf removal im...

The citrus mealybug, Planococcus citri (Risso) (Hemiptera: Pseudococcidae), is the main grapevine pest in vineyards in some countries, such as Spain and Brazil. In Galician vineyards (northwestern Spain), mealybug population levels are low because the accumulated degree-days are lower than in other grapevine-growing areas. The main problem caused b...

Arabis mosaic virus (ArMV; genus Nepovirus, family Comoviridae) is one of several nepoviruses responsible for infectious degeneration disease of grapevines in Europe (3). The first occurrence in Spain, in the summer of 2007, was found in Val de Salnés, Rias Baixas appellation, Galice on 25-year-old vines of the Albariño variety grafted onto an unid...

Several vineyards in Rías Baixas and one in the Ribeira Sacra (Spain) were monitored and the spatial pattern of leafroll-diseased grapevine was analysed at several dates. Unidimensional aggregation analysis (ordinary runs), bidimensional analysis, and disease gradients analysis were used as methods of study of spatial aspects of epidemics of GLRaV....

Grapevine leafroll-associated virus 3 (GLRaV-3) is a mealybug-transmissible ampelovirus. Though the transmission mechanism has been described as semipersistent on the basis of temporal parameters, definitive proof of this mechanism has never been provided. In the present study, we carried out preliminary assays to establish the location of the viru...

The necessity to develop low-input, environmentally friendly agronomic techniques has encouraged changes in soil management systems in vineyards. The study and characterisation of adventitious flora is important if the integrated management of vineyards is to be achieved.The composition of vineyards weed flora is strongly affected by agricultural p...

With the aim of investigating the dynamics of transmission of GLRaV-3, we report and analyse time-courses of infection incidence in various plots in one vineyard in Rías Baixas (Galicia, Spain). GLRaV-3 infection was close to 100% after 15years monitoring the epidemic in several plots where P. citri was widely spread although with low density popul...

Experiments were carried out in the laboratory to assess the insecticidal effect on Myzus persicae Sulzer of different oils applied alone or combined with imidacloprid or pirimicarb. The oils tested were a horticultural mineral oil, a refined rapeseed oil, a refined soya oil and a raw fish oil. When the oils were sprayed alone on pepper plants infe...

Laboratory, greenhouse and field experiments were performed on vegetable, fish and mineral oils to evaluate their phytotoxic effects on grapevine and their effectiveness in the control of grapevine powdery mildew. None of the oils tested showed detectable phytotoxic effects at concentrations of 2% or less applied up to 4 times per week. In greenhou...

Mineral oils are widely used to control non-persistently transmitted viruses by aphid vectors, but mineral oils cause a number of problems including significant phytotoxicity. This study comprises three series of assays to compare a mineral oil, a fish oil and four vegetable oils for: a) insecticidal effects on the aphid Myzus persicae; b) inoculat...

Empleo de aceites de distinto origen, en programas de manejo integrado en pimiento para el control del pulgón Myzus Persicae (Sulzer) I. VARELA BARRENECHEA, C. CABALEIRO SOBRINO, B. MARTÍN LÓPEZ Dentro de un estudio que se está llevando a cabo en la Escuela Politécnica Superior de Lugo para investigar el potencial insecticida y fungicida de aceites...

En el año 2000 se iniciaron estudios para determinar la viabilidad del cultivo de patata de siembra en A Limia (Ourense). El Instituto do Campo (INORDE) inició en 2000 un programa de análisis de virosis en lotes de patata cultivada por algunos agricultores, para su uso como patata de siembra. En algunos casos esos lotes tenían un nivel de PVY y PLR...

The insecticide properties of mineral oils derived from petrol have been known for some time (Chapman, 1967) and have been used traditionally to control win-tering forms of woody pest species, especially homop-tera and acarids. In spite of these posing no danger to the environment and the auxiliary fauna, the potential of these oils has not been fu...

An experimental vineyard that was healthy when planted, but in which a number of GLRaV-3 infected plants were detected two years after grafting, was studied during its first three productive years. The sugar content of the must of GLRaV-3 infected plants was an average 1°Brix lower than that of healthy plants, their titratable acidity was higher an...

Grapevine trichovirus A (GVA), a flexuous, filamentous, phloem-limited virus with an approximately 7.3-kbp RNA genome, is widespread in grapevines showing symptoms of leafroll and/or rugose wood. The virus can be mechanically inoculated to Nicotiana benthamiana and N. clevelandii. A field survey of diseased Vitis vinifera white and red cultivars wa...

Some characteristics of the acquisition and transmission of GLRaV-3 by Planococcus citri were determined by ELISA testing and transmission experiments. Groups of five insects were used, i.e. the advisable minimum group size suggested by the results of ELISA of insect groups of various sizes. The virus was transmitted to only 1/10 test plants each o...

The spatial distributions of grape plants with symptoms of grapevine leafroll in nine vineyards in the Galician wine-growing region Rfas Baixas (northwestern Spain) were analyzed. In five, significant aggregations of diseased plants and/or disease gradients toward one of the borders of the plots constituted indirect evidence of vector transmission...

La cochinilla algodonosa Planococcus citri (Risso) aparece en algunos viñedos gallegos. Las poblaciones, que normalmente no son demasiado grandes, no suponen un perjuicio directo para el cultivo de la uva de vinificación. Sin embargo, la capacidad de transmisión de uno de los ampelovirus del enrollado de la vid (Grapevine leafroll associated virus...