Natural process and use of natural matters in organic viticulture

Sivčev, Branislava; Sivčev, Ivan; Ranković‐Vasić, Zorica

doi:10.2298/jas1002195s

Cited by 15 publications

(12 citation statements)

References 22 publications

(24 reference statements)

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“…This may be ascribed to the youth of the plantation (3 rd year), given that in 2018 the yield was comparable to those reported above. Concerning Ravaz indices, values in the 5-7 range are advised to avoid imbalances in the vine, although other authors have suggested a wider range (5)(6)(7)(8)(9)(10)(11)(12), depending on the cultivar, load, irrigation dose and driving systems [58,59]. Very high values-above 10-indicate that the vine has produced a lot of grape for its vigor, that is, that it presents a mismatch due to excess of production or defect in vigor.…”

Section: Discussionmentioning

confidence: 99%

Behavior of Vine Varieties Resistant to Fungal Diseases in the Somontano Region

et al. 2019

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The vine is highly susceptible to numerous fungal diseases, the incidence and severity of which are increasing because of climate change. To fight them, large amounts of phytosanitary products are generally used, although they entail important economic and environmental costs. The new fungus resistant vine varieties (PIWI) constitute one of the most active lines of research on plant material in viticulture and are regarded as a viable solution to respond to the requirements of European Directive 2009/128/EC. In the present work, the evolution and impact of the three main fungal diseases (powdery mildew, downy mildew and botrytis bunch rot) were monitored in plots in the Somontano region (Huesca, Spain), comparing three PIWI varieties (Sauvignon Kretos, Souvignier gris and Muscaris) with a susceptible control variety (Sauvignon blanc) in real field growing conditions over three successive years (2016–2018). The main ampelographic characters of each variety were studied and a weekly follow-up was carried out to track the development of each disease, relating it to climatic variables. Regardless of the climatic conditions (one of the growing seasons was rainy and the other two corresponded to dry years, with differences in the distribution of rainfall), the three PIWI varieties hardly presented any symptoms, demonstrating a high resistance to downy mildew and powdery mildew and even to botrytis. Principal component analysis results pointed to a differential behavior versus the control and treated Sauvignon blanc plants in terms of disease resistance. Based on production results, despite the youth of the plantation, the excellent potential of Sauvignon Kretos variety was observed. However, from the analysis of the quality of wine obtained in microvinifications from these fungus resistant varieties in the second and third year, the one obtained from Muscaris seemed to have the best organoleptic properties. Apart from environmental considerations, given that these fungus resistant varieties can significantly contribute to the sustainability of wineries, they may also respond to the demand of consumers who want zero-pesticide products or of the supporters of ecological products adjusted to European regulations.

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Section: Discussionmentioning

confidence: 99%

Behavior of Vine Varieties Resistant to Fungal Diseases in the Somontano Region

et al. 2019

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“…Although the highest classification (Protected Designation of Origin, PDO) requires V. vinifera varieties, hybrids can be used in the next level (called Protected Geographical Indication, PGI). Interspecific, disease resistant hybrids are generally referred to as PIWI (from German: pilzwiderstandsfähig, meaning “fungal disease resistant”) and they are now accepted as V. vinifera varieties in the most European Catalogues [17]. Nowadays “PIWI” is also the name of a producer group devoted to the “dissemination of fungus-resistant grape varieties” with 350 members from 17 European and North American countries, some of whom running private breeding programs [18].…”

Section: Introductionmentioning

confidence: 99%

R-Loci Arrangement Versus Downy and Powdery Mildew Resistance Level: A Vitis Hybrid Survey

Zini

Dolzani

Stefanini

et al. 2019

IJMS

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For the viticulture of the future, it will be an essential prerequisite to manage grapevine diseases with fewer chemical inputs. The development and the deployment of novel mildew resistant varieties are considered one of the most promising strategies towards a sustainable viticulture. In this regard, a collection of 102 accessions derived from crossing Vitis hybrids with V. vinifera varieties was studied. In addition to the true-to-type analysis, an exhaustive genetic characterization was carried out at the 11 reliable mildew resistance (R) loci available in the literature to date. Our findings highlight the pyramiding of R-loci against downy mildew in 15.7% and against powdery mildew in 39.2% of the total accessions. The genetic analysis was coupled with a three-year evaluation of disease symptoms in an untreated field in order to assess the impact of the R-loci arrangement on the disease resistance degree at leaf and bunch level. Overall, our results strongly suggest that R-loci pyramiding does not necessarily mean to increase the overall disease resistance, but it guarantees the presence of further barriers in case of pathogens overcoming the first. Moreover, our survey allows the discovery of new mildew resistance sources useful for novel QTL identifications towards marker-assisted breeding.

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“…The firsts fungus-resistant varieties, issued from traditional breeding, carried a significant percentage of non-V. vinifera species in their genetic and were therefore considered as "interspecific hybrids" [3]. Based only on phenotypic evaluation data, it is hardly feasible to track the accumulation of resistance genes in a new breeding a e-mail: andresouza@epagri.sc.gov.br; caliari@ epagri.sc.gov.br; joaogardin@epagri.sc.gov.br; dalbo@epagri.sc.gov.br; samilasc@yahoo.com.br b e-mail: brighent@epagri.sc.gov.br; albertobrighenti@epagri.sc.gov.br c e-mail: marco.stefanini@fmach.it d e-mail: oliver.trapp@julius-kuehn.de e e-mail: leocir.welter@ufsc.br f e-mail: samilasc@yahoo.com.br line [4].…”

Section: Introductionmentioning

confidence: 99%

“…The use of molecular markers provides a new tool for breeders and may help to overcome this problem [5]. This tool allowed the development of fungus-resistant varieties carrying both disease-resistance genes and a significant percentage (more than 85%) of V. vinifera in their pedigree; those are generally referred to as "PIWI" (from German: Pilzwiderstandsfähige, "disease resistant") and are accepted as V. vinifera varieties in European catalogues [3].…”

Section: Introductionmentioning

confidence: 99%

Performance of resistant varieties (PIWI) at two different altitudes in Southern Brazil

Souza¹,

Brighenti²,

Brighenti³

et al. 2019

BIO Web Conf.

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In southern Brazil there is a predominance of labrusca and hybrid varieties for wine and juice production due to climatic conditions of high rainfall, temperature and relative humidity. Growing varieties that combine disease resistance and wine quality (PIWI) can be an alternative to improve wine quality. The objective of this work was to evaluate the performance of three PIWI varieties (Felicia, Calardis Blanc and Aromera) in two regions (Videira, 27 • 01"S and 51 • 08"W, altitude 830 m; and São Joaquim, 28 • 13"S and 50 • 04"W, altitude 1100 m) in the vintage 2018. The date of occurrence of main phenological stages, productiveindexes, clusters characteristics and grape qualitative indexes was evaluated. There was no difference for budbreak date, but flowering, veraison an maturity time varied between regions. The development of plants is slower when they are cultivated at a higher altitude. The number of clusters per plant and yield were higher at 830 m for all varieties. For productive indexes Felicia and Calardis Blanc varieties stood out in relation to Aromera in all parameters. Among the evaluated varieties, Felicia and Calardis Blanc were better adapted to the lower altitude region and had higher productivity and the same grape quality. On the other hand, Aromera presented higher productivity at 830 m but higher soluble solids content at 1100 m.

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Natural process and use of natural matters in organic viticulture

Cited by 15 publications

References 22 publications

Behavior of Vine Varieties Resistant to Fungal Diseases in the Somontano Region

Behavior of Vine Varieties Resistant to Fungal Diseases in the Somontano Region

R-Loci Arrangement Versus Downy and Powdery Mildew Resistance Level: A Vitis Hybrid Survey

Performance of resistant varieties (PIWI) at two different altitudes in Southern Brazil

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