scholarly journals Effects of fungicides on the development of downy mildew disease of grape vine caused by Plasmopara viticola (Berk. & Curt.) Berl. & De Toni

1986 ◽  
Vol 14 (1) ◽  
pp. 145
Author(s):  
N. Ramanathan ◽  
A. Sivapalan
Keyword(s):  
Downy Mildew ◽  
Plasmopara Viticola ◽  
Grape Vine ◽  
Downy Mildew Disease

scholarly journals Isolation of Plasmopara viticola from Grapevine Leaves

Proceedings ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 34
Author(s):  
Camelia Ungureanu ◽  
Liliana Cristina Soare ◽  
Diana Vizitiu ◽  
Mirela Calinescu ◽  
Irina Fierascu ◽  
...  
Keyword(s):  
Downy Mildew ◽  
Plasmopara Viticola ◽  
Grapevine Downy Mildew ◽  
Grapevine Leaves ◽  
Downy Mildew Disease

In order to test some biofungicides, the isolation of Plasmopara viticola was carried out.Plasmopara viticola is a fungus that causes the grapevine downy mildew disease [...]

scholarly journals IMPROVED DOWNY MILDEW CONTROL IN WINE GRAPES WITH VOSSEN BLUE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 605d-605
Author(s):  
Joseph A. Fiola ◽  
Gary C. Pavlis
Keyword(s):  
Downy Mildew ◽  
Disease Incidence ◽  
Total Yield ◽  
Economic Loss ◽  
Plasmopara Viticola ◽  
Wine Grapes ◽  
Incidence Data ◽  
Average Cluster ◽  
Grape Cultivars ◽  
Downy Mildew Disease

Downy Mildew, Plasmopara viticola, causes major damage and economic loss to many wine grape cultivars grown in the Northeast. The purpose of the experiment was to test the efficacy of Vossen Blue (VB; iron pigment) in association with fungicides for the control of Downy Mildew disease of wine grapes in New Jersey. The experimental plot was a planting of `Seyval Blanc' (5th leaf). Treatments (applied via back-pack sprayer) included no fungicide (control I), full fungicide (FF) (RCE commercial recs; control II), FF + 4%VB, FF + 8%VB, 8%VB, Half Rate Fungicide (HF) + 4%VB, HF + 8%VB. There were no significant differences between treatments for total yield, average cluster weight, average berry weight, Brix %, and pH. Spectrophotometric (Hunter's Lab) analysis of foliage samples revealed that leaf samples from the VB treatments had greater green color (correlate: increased chlorophyll). Analysis of subjective (1-9) disease incidence data: FF8 significantly lower disease score that FF; FF4, HF4, HF8, and FF no difference. Compared to normal full fungicide: superior Downy Mildew control was achieved by adding VB to full fungicide; equal control was achieved with half fungicide and VB.

scholarly journals 800 PB 080 IMPROVED DOWNY MILDEW CONTROL IN WINE GRAPES WITH VOSSEN BLUE

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 547g-547
Author(s):  
Gary C. Pavlis ◽  
Joseph A. Fiola
Keyword(s):  
Downy Mildew ◽  
Statistical Difference ◽  
Leaf Tissue ◽  
Economic Loss ◽  
Plasmopara Viticola ◽  
Experimental Plot ◽  
Wine Grapes ◽  
Yield Data ◽  
Grape Cultivars ◽  
Downy Mildew Disease

Downy Mildew, Plasmopara viticola, causes major damage and economic loss to many wine grape cultivars grown in the Northeast. The purpose of this experiment was to test the efficacy of Vossen Blue (VB; iron pigment) in association with fungicides for the control of Downy Mildew disease of wine grapes in New Jersey. The experimental plot was a planting of Chancellor (10th leaf). Treatments (applied via back-pack sprayer) included no fungicide (NF), full fungicide (FF) (RCE commercial recs. half fungicide (HF), FF + 8%VB (FF8), HF + 8% VB (HF8), 88V B. Subjective (l-9) disease score for leaf tissue showed no statistical difference between the FF, FF8, HF and HF8 treatments however all showed superior Downy Mildew control to the 8% VB and the no fungicide control. Yield data indicated that the FF8 treatment resulted in higher yield (p is ≤ 0.01) than FF, HF and HF8. The NF and 8VB treatments resulted in the lowest yield. Compared to normal full fungicide, superior Downy Mildew control on the fruit was achieved by adding VB to full fungicide. These results are consist with previous experiments conducted on Seyval Blanc.

scholarly journals The effect of Saccharomyces cerevisiae on antioxidant system of grape leaves infected by downy mildew

2020 ◽  
Vol 25 ◽  
pp. 06006
Author(s):  
Alisa Mishko ◽  
Eugene Lutsky
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Immune Response ◽  
Downy Mildew ◽  
Plasmopara Viticola ◽  
Stilbene Synthase ◽  
Resistant Cultivar ◽  
Susceptible Cultivar ◽  
Defense System ◽  
Pre Treatment ◽  
Downy Mildew Disease

In this article, results of the comparative analysis and assessment of resistance of two grape cultivars Vostorg and Muscat blanc against downy mildew disease (Plasmopara viticola) with or without the symbiote Saccharomyces cerevisiae (vine yeast) were shown. The highly resistant cultivar Vostorg with yeast pre-treatment demonstrated a high defensive capability to the pathogen due to the fast immune response. On the first day after inoculation with downy downy mildew the rapid increase in the hydrogen peroxide, which is involved the first step of the grape’s defense system induction, was observed. At the same time, the upregulation of the relative expression of the PR2 protein (β-1,3-gluconase), a key gene involved in the plant’s resistance to pathogens. The oxidative burst was not detected in the susceptible cultivar Muscat blanc for the couple of hours after inoculation with downy mildew pathogen. The significant increase of the total phenols content and expression of stilbene synthase, which is an enzyme involved in the synthesis of phytoalexins, was observed in leaves of Muscat blanc. It was shown that pre-treatment of grape leaves with natural symbiote S. cerevisiae enhanced the immune response of the resistant cultivar Vostorg and inducted phytoalexins synthesis in the susceptible cultivar Muscat blanc.

scholarly journals Eucalyptus staigeriana essential oil can control downy mildew in grapevine

2021 ◽  
Vol 28 (1) ◽  
pp. 1-14
Author(s):  
Carine Pedrotti ◽  
Clarissa Franzoi ◽  
Rafael Nicolas Sandi ◽  
Daniel Santos Grohs ◽  
Joséli Schwambach
Keyword(s):  
Downy Mildew ◽  
Conventional Treatment ◽  
Yield Loss ◽  
Plant Protection ◽  
Plasmopara Viticola ◽  
Study Objective ◽  
Severity Of Disease ◽  
Downy Mildew Disease

Downy mildew (Plasmopara viticola) is the primary disease in viticulture worldwide, and your control requires synthetic fungicides applications to avoid quality and yield loss in the grapevines. However, alternatives to reduce synthetic fungicides are needed to ensure the consumer’s health and the environment. Essential oils (EOs) are amongst the most promising natural plant protection alternatives because of their antifungal properties on several crop diseases. The present study objective was to determine the effect of Eucalyptus staigeriana EO in vitro and in vivo against P. viticola. The EO exhibited the highest activity in vitro, inhibiting 90% of the incidence and severity of disease caused by P. viticola in leaves of grapevines in the greenhouse. In the field (in vivo), treatment with EO could not control the disease; however, treatment with EO in consortium with conventional treatment reduced approximately 50% of the incidence and more than 90% of the severity of downy mildew disease in leaves, decreasing the application of synthetic fungicides by 50%.

scholarly journals Content of trans-resveratrol in leaves and berries of interspecific grapevine (Vitis sp.) varieties

2009 ◽  
Vol 26 (Special Issue) ◽  
pp. S13-S17 ◽  
Author(s):  
P. Bábíková ◽  
N. Vrchotová ◽  
J. Tříska ◽  
M. Kyseláková
Keyword(s):  
Powdery Mildew ◽  
Downy Mildew ◽  
Plasmopara Viticola ◽  
Fungal Diseases ◽  
Uncinula Necator ◽  
Botryotinia Fuckeliana

The aim of this project was to study changes in the content of <i>trans</i>-resveratrol in berries and leaves of grapevine (<i>Vitis</i> sp.) infested by fungal diseases, especially by <i>Botryotinia fuckeliana</i> Whetzel, called as grey mildew, <i>Plasmopara viticola</i> (Berk. & M.A. Curtis) Berl & De Toni, called downy mildew and <i>Uncinula necator</i> (Schw.) Burr, called powdery mildew. In our experiments two white and two blue varieties were used. Contents of <i>trans</i>-resveratrol were determined in healthy and infested leaves and in healthy berries. Infested leaves of white varieties contained more <i>trans</i>-resveratrol than those of blue varieties. The content of <i>trans</i>-resveratrol in berries was lower than that in leaves.

scholarly journals Investigation of long non-coding RNAs as regulatory players of grapevine response to powdery and downy mildew infection

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Garima Bhatia ◽  
Santosh K. Upadhyay ◽  
Anuradha Upadhyay ◽  
Kashmir Singh
Keyword(s):  
Downy Mildew ◽  
Plasmopara Viticola ◽  
Defense Responses ◽  
Protein Coding ◽  
Functional Roles ◽  
Real Time Quantitative Pcr ◽  
Transcriptional Reprogramming ◽  
Sequencing Technologies ◽  
Non Coding Rnas ◽  
Fungal Phytopathogens

Abstract Background Long non-coding RNAs (lncRNAs) are regulatory transcripts of length > 200 nt. Owing to the rapidly progressing RNA-sequencing technologies, lncRNAs are emerging as considerable nodes in the plant antifungal defense networks. Therefore, we investigated their role in Vitis vinifera (grapevine) in response to obligate biotrophic fungal phytopathogens, Erysiphe necator (powdery mildew, PM) and Plasmopara viticola (downy mildew, DM), which impose huge agro-economic burden on grape-growers worldwide. Results Using computational approach based on RNA-seq data, 71 PM- and 83 DM-responsive V. vinifera lncRNAs were identified and comprehensively examined for their putative functional roles in plant defense response. V. vinifera protein coding sequences (CDS) were also profiled based on expression levels, and 1037 PM-responsive and 670 DM-responsive CDS were identified. Next, co-expression analysis-based functional annotation revealed their association with gene ontology (GO) terms for ‘response to stress’, ‘response to biotic stimulus’, ‘immune system process’, etc. Further investigation based on analysis of domains, enzyme classification, pathways enrichment, transcription factors (TFs), interactions with microRNAs (miRNAs), and real-time quantitative PCR of lncRNAs and co-expressing CDS pairs suggested their involvement in modulation of basal and specific defense responses such as: Ca2+-dependent signaling, cell wall reinforcement, reactive oxygen species metabolism, pathogenesis related proteins accumulation, phytohormonal signal transduction, and secondary metabolism. Conclusions Overall, the identified lncRNAs provide insights into the underlying intricacy of grapevine transcriptional reprogramming/post-transcriptional regulation to delay or seize the living cell-dependent pathogen growth. Therefore, in addition to defense-responsive genes such as TFs, the identified lncRNAs can be further examined and leveraged to candidates for biotechnological improvement/breeding to enhance fungal stress resistance in this susceptible fruit crop of economic and nutritional importance.

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