First report of bacterial spot caused by Xanthomonas cucurbitae on pumpkin in Italy

Kumari

et al. 2020

JSRR

To assess the prevalence and severity of bacterial leaf spot on bottle gourd and pumpkin, a survey was conducted in Hamirpur, Una and Bilaspur districts of sub tropical zone of Himachal Pradesh, India during the years 2018 and 2019. Data were recorded in terms of disease severity and fruit rot incidence. The associated pathogen from bottle gourd and pumpkin was isolated on nutrient sodium chloride agar medium and identified on the basis of morphological, biochemical and pathogenicity tests on bottle gourd and pumpkin seedlings. Disease was found to be prevalent at all the locations surveyed exhibiting a mean disease severity from 24.70 to 87.55 and 5.30 to 52.92 per cent in bottle gourd and pumpkin, respectively. Fruits of bottle gourd were recorded to be affected badly exhibiting a mean fruit rot incidence of 10.23 to 95.32 to per cent, while, no fruit rot incidence was recorded in pumpkin fruits. The colonies of the isolated bacterium were mucoid, circular, smooth textured and yellow in colour having a diameter of 2-4 mm. The pathogen was found to be Gram–ve and tested positive for esculin hydrolysis as well as protein digestion test. During pathogenicity tests, incubation period of 2 and 4 days was recorded on bottle gourd and pumpkin, respectively. Based on these studies, the identity of the pathogen was confirmed to be Xanthomonas cucurbitae(ex Bryan) Vauterin et al.

Section: Symptomatologysupporting

confidence: 90%

Section: Symptomatologysupporting

confidence: 85%

Prevalence of Bacterial Leaf Spot of Bottle Gourd and Pumpkin in Subtropical Zone of Himachal Pradesh

Kumari

et al. 2020

JSRR

“…manihotis [ 21 ]. International trade and climate change appear fundamental to support dissemination of xanthomonads worldwide and their adaptation and establishment in new areas, as several recent findings confirm [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 89%

Bacteriophage-Mediated Control of Phytopathogenic Xanthomonads: A Promising Green Solution for the Future

et al. 2021

Xanthomonads, members of the family Xanthomonadaceae, are economically important plant pathogenic bacteria responsible for infections of over 400 plant species. Bacteriophage-based biopesticides can provide an environmentally friendly, effective solution to control these bacteria. Bacteriophage-based biocontrol has important advantages over chemical pesticides, and treatment with these biopesticides is a minor intervention into the microflora. However, bacteriophages’ agricultural application has limitations rooted in these viruses’ biological properties as active substances. These disadvantageous features, together with the complicated registration process of bacteriophage-based biopesticides, means that there are few products available on the market. This review summarizes our knowledge of the Xanthomonas-host plant and bacteriophage-host bacterium interaction’s possible influence on bacteriophage-based biocontrol strategies and provides examples of greenhouse and field trials and products readily available in the EU and the USA. It also details the most important advantages and limitations of the agricultural application of bacteriophages. This paper also investigates the legal background and industrial property right issues of bacteriophage-based biopesticides. When appropriately applied, bacteriophages can provide a promising tool against xanthomonads, a possibility that is untapped. Information presented in this review aims to explore the potential of bacteriophage-based biopesticides in the control of xanthomonads in the future.

Biological and Abiotic Stress in Cucurbitaceae Crops

“…Bacterial leaf spot disease was reported for the first time on Hubbard squash in New York in 1926 [17]. The disease has since then been reported in various cucurbits [18] like on watermelon from Georgia [19]; pumpkin from the United States [20], Reunion Island [21], Nepal [22], and Italy [23] and bottle gourd from India [13]. In India, the disease was first reported in 1989 from Bihar on cucumber.…”

Section: Occurrencementioning

confidence: 99%

Bacterial Leaf Spot of Cucurbits: A Menace to Cultivation

Jarial¹,

Jarial²,

Bhardwaj³

et al. 2023

Bacterial leaf spot is one of the important diseases of cucurbits affecting almost all the cultivated cucurbits worldwide. The disease has been reported to cause huge losses to the cucurbits as the symptoms of the disease appear on all plant parts including fruits. The disease is favoured by moderate to high temperatures and high humidity. The pathogen perpetuates in The seed and infected crop debris. The management efforts for the disease are still on and there are reports of it's management upto more than 50 per cent level under field conditions. However, the disease can be managed by the use of common antibiotics .