Increasing the shelf life of post-harvest table grapes (Vitis vinífera cv. Thompson Seedless) using different packaging material with copper nanoparticles to change the atmosphere

Fruit of Vitis vinifera cvs. Flame Seedless, Thompson Seedless and Black Monukka were fumigated with 4, 6 and 8 Deccodione Smoke Tables (DST) for 30 minutes. Fruit was stored at 32 F and high relative humidity. Decay control index, freshness of stems and bleaching around the capstem were recorded at 4, 8, 12 and 16 weeks of storage. Size of the aerosol particles was determined using an electrical aerosol analyzer. Fruit was analysed for Deccodione residues. Lower rates of the fungicide gave unsatisfactory decay control. Eight DSTs successfully controlled decay upto a period of 14 weeks. There was no bleaching of pigments commonly associated with sulfur dioxide fumigation. Majority of the aerosol particles were between 0.18 and 0.32 micrometers. Deccodione residues on the fruit were within the acceptable limits established for Deccodione. There was no perceptible difference in taste between treated and control fruit. This method of decay control could provide a viable alternative to sulfur dioxide fumigation.

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Pre-anthesis CPPU Treatment Modifies Quality and Susceptibility to Post-harvest Berry Cracking of Vitis vinifera cv. ‘Thompson Seedless’

Journal of Plant Growth Regulation ◽

10.1007/s00344-016-9649-3 ◽

2017 ◽

Vol 36 (2) ◽

pp. 413-423 ◽

Cited By ~ 3

Author(s):

Francisca Jáuregui-Riquelme ◽

María Soledad Kremer-Morales ◽

José Antonio Alcalde ◽

Alonso Gastón Pérez-Donoso

Keyword(s):

Vitis Vinifera ◽

Thompson Seedless ◽

Post Harvest

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Botrytis prunorum Associated to Vitis vinifera Blossom Blight in Chile

Plant Disease ◽

10.1094/pdis-09-19-2055-sc ◽

2020 ◽

Vol 104 (9) ◽

pp. 2324-2329

Author(s):

Marcela Esterio ◽

Claudio Osorio-Navarro ◽

Claudia Carreras ◽

Madelaine Azócar ◽

Charleen Copier ◽

...

Keyword(s):

Vitis Vinifera ◽

Central Valley ◽

Development Stage ◽

Thompson Seedless ◽

Climate Conditions ◽

Table Grapes ◽

Pathogenicity Tests ◽

White Mycelium ◽

Multilocus Approach ◽

Epidemiological Characteristics

Table grapes are highly susceptible to Botrytis cinerea infections during the bloom period. After reaching the flower development stage, B. cinerea remains quiescent until berry ripening or gives rise to blossom blight under specific climate conditions. A research study was conducted on the Chilean Central Valley during the 2018–2019 growing season. Flowers of Vitis vinifera cv. Thompson Seedless were collected and B. cinerea was isolated together to a second and morphologically different species, characterized by white mycelium and low to no sporulation (11.4% of total isolates). Three randomly selected isolates within this population were genetically examined and identified as Botrytis prunorum based on a phylogenetic multilocus approach using partial regions of genes RPB2, HSP60, and G3PDH or NEP1 and NEP2. Pathogenicity tests showed that B. prunorum infects and causes wilting in healthy table grape flowers. B. prunorum isolates were able to infect Thompson Seedless berries, inducing lesions between 13.11 and 41.53% with respect to the lesion diameter generated by B. cinerea B05.10. The fungicide sensitivity was evaluated. The three genetically characterized isolates were sensitive to boscalid and to cyprodinil/fludioxonil mixture with a mean EC50 value of 5.5 µg/ml and 0.065 µg/ml, respectively. However, loss of sensitivity to fenhexamid was determined, with a mean EC50 value of 5.13 µg/ml. Our understanding about blossom blight in V. vinifera has been limited to B. cinerea. Here we associated B. prunorum as a second causal agent of this disease in Chile. This data represents a first approach to the epidemiological characteristics of B. prunorum associated with blossom blight in table grapes.

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Resistance of Vitis Germplasm to Elsinoë ampelina (de Bary) Shear Evaluated by Lesion Number and Diameter

HortScience ◽

10.21273/hortsci.48.12.1433 ◽

2013 ◽

Vol 48 (12) ◽

pp. 1433-1439 ◽

Cited By ~ 15

Author(s):

Atsushi Kono ◽

Akihiko Sato ◽

Yusuke Ban ◽

Nobuhito Mitani

Keyword(s):

Vitis Vinifera ◽

Significant Positive Correlation ◽

Table Grape ◽

Wine Grapes ◽

Thompson Seedless ◽

Sources Of Resistance ◽

Positive Correlation ◽

Table Grapes ◽

Lesion Number ◽

Elsinoe Ampelina

We evaluated the resistance of 133 grapevine cultivars or selections, including Vitis vinifera and American hybrids, on the basis of lesion number and length to identify sources of resistance to grapevine anthracnose. All germplasms tested in this study showed anthracnose symptoms to some extent, and the distribution of lesion number and diameter was continuous. Most table grape V. vinifera cultivars were highly susceptible, showing many large lesions. However, V. vinifera wine grapes were more resistant with smaller lesions. Some American hybrid grapes such as ‘Ontario’ showed very few and small lesions. There was a significant positive correlation between lesion number and size in American (r = 0.63, P = 0.0041) and Japanese hybrids (r = 0.56, P < 0.001), whereas there was no correlation between these characters in V. vinifera. Japanese tetraploid cultivars were neither highly susceptible nor resistant. High anthracnose susceptibility of most well-known table grape V. vinifera cultivars, including ‘Muscat of Alexandria’, ‘Italia’, ‘Rizamat’, ‘Kattakurgan’, and ‘Thompson Seedless’, indicates that resistance should be introgressed from other cultivars such as American hybrids or wine grapes when these susceptible table grapes or their descendants are used in breeding anthracnose-resistant table grapes.

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