Evaluation of Different Grape Varieties for Resistance to Powdery Mildew Caused by Uncinula Necator

Khiavi, Hossein Karbalaei; Shikhlinski, Haji; Ahari, A Babai; Heydari, Asgar

doi:10.2478/v10045-009-0069-2

Cited by 4 publications

(9 citation statements)

References 6 publications

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“…This analysis suggests that powdery mildew disease is more effective on cultivars or genotypes. (Boso et al, 2006;Khiavi et al, 2009;Alonso-Villaverde et al, 2011;Yu et al, 2012;Gaforio et al, 2015). This variability in susceptibility may have several causes and mechanisms (anatomical, biochemical, molecular, etc.).…”

Section: Gráfico De Distribuição Com Base No Número De Acessos De Sevmentioning

confidence: 99%

Susceptibility to downy mildew (Plasmopara viticola) and powdery mildew (Erysiphe necator) of differentVitiscultivars and genotypes

Atak¹,

Akkurt

Çelik

et al. 2017

Ciência Téc. Vitiv.

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SUMMARYTurkey has a very old history of viticulture and also homeland of the grapevine (Vitis spp.). Vitis cultivars belonging to different species are grown in almost every region in the country. However, particularly downy mildew and powdery mildew diseases affect the cultivars belonging to Vitis vinifera. In northern of Turkey Vitis labrusca and hybrids between V.vinifera and V.labrusca are rather common. V.labrusca cultivars or genotypes exhibit generally higher degree of resistance than V. vinifera cultivars. However, resistance level can vary from cultivar to cultivar and even from clone to clone within one cultivar. In this study, different Vitis hybrids and genotypes which exhibit different downy and powdery mildew susceptibility are compared for two years. Especially some V.labrusca hybrids and genotypes appeared resistance for both diseases. On the other hand, interspecific crosses and V.vinifera cultivars were found to be more susceptible. Using resistant lines as parent in later breeding activities, it could be possible grow high quality table cultivars with much fewer pesticide applications or possibly without them. RESUMOA Turquia tem uma longa história vitícola, sendo inclusivé um dos pontos de origem da videira (Vitis spp.). As diferentes espécies de Vitis são cultivadas em quase todas as regiões do país. Doenças como o míldio e oídio afetam em particular as videiras pertencentes à espécie V.vinifera. No Norte da Turquia, as espécies Vitis labrusca e híbridos entre V. vinifera e V. labrusca são bastante comuns. As cultivares/genótipos de V. labrusca exibem um grau de resistência geralmente mais elevado do que as cultivares de V. vinifera. No entanto o nível de resistência pode variar de cultivar para cultivar e até mesmo de clone para clone dentro de uma mesma cultivar. Neste estudo foram comparados diferentes híbridos de Vitis e genótipos com diferentes suscetibilidades ao míldio e ao oídio por um período de dois anos. Alguns híbridos e genótipos de V.labrusca apresentaram resistência a ambas as doenças. Por outro lado, os cruzamentos interespecíficos e as cultivares de V.vinifera foram identificados como sendo mais susceptíveis. Usando linhas resistentes como linha parental em atividades de melhoramento posteriores, poderia ser possível desenvolver cultivares para produção de vinhos de mesa de alta qualidade com menores exigências de aplicações de pesticidas ou possivelmente sem eles.

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Section: Gráfico De Distribuição Com Base No Número De Acessos De Sevmentioning

confidence: 99%

Susceptibility to downy mildew (Plasmopara viticola) and powdery mildew (Erysiphe necator) of differentVitiscultivars and genotypes

Atak¹,

Akkurt

Çelik

et al. 2017

Ciência Téc. Vitiv.

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“…Uncinula necator) is the most widespread and destructive disease of grapevines (Halleen and Holz 2001;Khiavi et al 2009). Powdery mildew may be observed on all the green parts of the grapevine: leaves, branches, infl orescences, pedicels and berries (Bulit and Lafon 1978).…”

Section: Introductionmentioning

confidence: 99%

Overwintering form of Erysiphe necator, the causal agent of grapevine powdery mildew in southern Syria

Alimad¹,

Naffaa²,

Azmeh³

2017

Journal of Plant Protection Research

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Th e main aims of this study were to determine the overwintering form and the primary inoculum of Erysiphe necator, the causal agent of grapevine powdery mildew in southern Syria. Eleven vineyards located at fi ve diff erent geographical sites were visited every week from March to November in 2014 and 2015. Th e results of fi eld and histopathological studies showed that E. necator survived as mycelium in dormant grapevine buds during the winter season. Th e fi rst fl ag shoots were observed shortly aft er bud break in spring. Th e number of fl ag shoots varied greatly according to vineyards, cultivars and years, being present on 27.4 to 61.9% of the grapevines in 2014, and on 5.2 to 40% of the grapevines in 2015. Th e percentage of fl ag shoots on the same grapevine also varied according to the year, cultivar and location. It was between 4.3 to 9.4% in 2014, and 2.1 to 3.6% in 2015. Th e disease was observed only on Balady and Black cultivars. Conidia were released from the second week of May to early September. Th e fi rst conidia were trapped around mid-May, and the fi rst secondary symptoms were observed on leaves from mid-May to early June according to the site. Chasmothecia were observed on leaves in 45.5% of the studied vineyards. Th e fi rst observation of chasmothecia on leaves was in July, and their numbers varied greatly between vineyards and years. Chasmothecia were not detected on bark, nor were ascospores trapped at the beginning of the season. Th ese results confi rmed that the ascospores did not have any role in the initiation of spring infection. To the best of our knowledge, this is the fi rst report of the overwintering form of E. necator in Syria.

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“…Since then the disease has become the most important disease of grapevine [3]. The disease can reduce 50-70% of yield and 20% wine quality by causing off flavours [4,5]. The disease infect green leave tissues of grapevines, leaves appear white or greyish to white powdery, covering upper and lower surface of the leaves [3].…”

Section: Introductionmentioning

confidence: 99%

“…The infection starts when mycelium emerges from buds during initial growing, and then infects leaves [9]. The development of powdery mildew is seasonal and favoured in temperature ranging from 18-30°C [5]. The cleistothecia develop and become mature in the late summer and fall anywhere on the vine that mildew takes place [3].…”

Section: Introductionmentioning

confidence: 99%

“…Under favourable conditions, production of conidia can occur within 7-10 days after primary infection. This cycle continues throughout the seasons as long as moderate temperature between [18][19][20][21][22][23][24][25][26][27][28][29][30] o C persists [5]. For decades, fungicides such as sulphur have been used to control powdery mildew in grape [3].…”

Section: Introductionmentioning

confidence: 99%

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Screening for resistance of grape varieties to powdery mildew (Erysiphenecator) disease

Mwamahonje

Kilambo²,

Mrosso

et al. 2015

JAA

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This study was conducted to evaluate the susceptibility of grapevine varieties to powdery mildew. Powdery mildew is a disease caused by a fungal, Erysiphe necator, and an obligate parasite of grapevine (Vitis vinifera L.). Powdery mildew causes drastic yield losses of 50 to 70%. Commercial grapevines grown in producing countries are susceptible to powdery mildew. Use of fungicides to control the disease is expensive and not environmentally friendly. Therefore, use of grapevine resistant varieties to powdery mildew is cost-effective control method. In this study, ten varieties (Black rose, Regina, Queen of Vineyards, Alphonce lavallee, Makutupora red, Chancellor, Halili belyji, Syrah, Ruby seedless and Makutupora white) were screened for resistance to powdery mildew, using artificial inoculation of spore suspension and dry inoculums. Infected grape leaves were sampled from the field and grounded to obtain powder which was used as dry inoculum. The spore suspension inoculum was made by mixing powder with sterilized distilled water. The inoculation was done in two blocks with concentration of 2x10 5 spore/ml. Disease severity was evaluated based on a scale of 0 -5; 0, means immune and 5, high level of disease severity. Results showed significant difference (P<0.05) of disease among grapevine varieties evaluated. It was found that 11.1% were resistant, 33.4% tolerant and 55% susceptible to disease. Grapevine variety Chancellor showed the highest level of resistance, and Black rose the most susceptible. The study demonstrates the effectiveness of using inoculation methods in screening resistance to powdery mildew. Indexing terms/KeywordsErysiphe necator; Grapevine; Powdery mildew; Resistance; Severity. Academic Discipline And Sub-DisciplinesThe relevant academic disciplines for this journal is based on plant pathology studies SUBJECT CLASSIFICATIONThe subject is Agriculture classification TYPE (METHOD/APPROACH)The research type is experiment; laboratory analysis for inoculum and field experiment evaluation

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Evaluation of Different Grape Varieties for Resistance to Powdery Mildew Caused by Uncinula Necator

Cited by 4 publications

References 6 publications

Susceptibility to downy mildew (Plasmopara viticola) and powdery mildew (Erysiphe necator) of differentVitiscultivars and genotypes

Susceptibility to downy mildew (Plasmopara viticola) and powdery mildew (Erysiphe necator) of differentVitiscultivars and genotypes

Overwintering form of Erysiphe necator, the causal agent of grapevine powdery mildew in southern Syria

Screening for resistance of grape varieties to powdery mildew (Erysiphenecator) disease

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