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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(10): 1190-1201
DOI: https://doi.org/10.20546/ijcmas.2020.910.143


Generation of a Bio-intensive Strategy using Chitosan Formulations and Ampelomyces quisqualis for the Management of Powdery Mildew of Grapes
Ratna U. Thosar1*, Indu Sawant1, Vijayshree M. Chavan1, Sanjay D. Sawant2, Sujoy Saha1 and A. Vikram Suthakar3
1Department of Plant Pathology, ICAR- National Research Centre for Grapes, Pune – 412307, Maharashtra, India
2BalasahebSawantKonkanKrishiVidyapeeth, Dapoli – 415712, Maharashtra, India
3AuraphyllInnoventures India Pvt. Limited, Coimbatore- 641035, TamilNadu, India
*Corresponding author
Abstract:

Powdery mildew caused by Erysiphe necator is one of the most important diseases of grapevine in India. It affects the grape production by causing significant reduction in yield and quality of grapes. Chitosan is a deactivated derivative of chitin and the efficacy of three chitosan formulations, Chitosan fulvate @ 2ml/L, Chitosan oligosaccharides @ 2ml/L, Chitosan @ 4ml/L were evaluated against powdery mildew. The physiological loss in weight of berries was also assessed. During the fruiting seasons of 2018-2019 and 2019-2020, chitosan formulations were evaluated both as solo treatments and in alternation with Ampelomyces quisqualis @ 5ml/L. All Chitosan formulations effectively inhibited powdery mildew on leaves and berries when compared to untreated control. Among solo treatments, chitosan exhibited lower PDI (17.76 and 5.29) on leaves than untreated control (24.28 and 13.12) during 2018-2019 and 2019-2020 respectively. In case of bunches similar trend was observed with PDI 23.39 and 9.90 against untreated control 30.31 and 17.18 in both seasons. However, the formulations were found more effective when used in alternation with Ampelomyces quisqualis. During 2018-2019 and 2019-2020, Chitosan / Ampelomyces quisqualis treatment recorded significantly lower PDI of powdery mildew on leaves i.e.12.55 and 4.77than the untreated control with PDI 24.28 and 13.22 respectively. In case of bunches, treatment Chitosan / Ampelomyces quisqualis showed the lowest disease severity with PDI 19.28 and 8.98 against untreated control with PDI 31.60 and 17.18 in both the seasons respectively. The applications of formulation containing chitosan alternated with sprays of Ampelomyces quisqualis (5ml/L) showed least disease as well physiological loss in weight of grapes. All chitosan formulations were effective in minimizing physiological loss in weight of grapes as compared to control. Among all treatments, Chitosan / Ampelomyces quisqualis treatment recorded the lowest PLW i.e.13.94 and 13.90, whereas untreated control showed the highest PLW i. e. 15.85 and 15.87 during both seasons respectively. Results showed that chitosan can be effectively used in powdery mildew management, either alone or in alternation with the bio-formulation of Ampelomyces quisqualis.


Keywords: Chitosan, Powdery mildew, Grapes, Erysiphe necator, Ampelomycesquisqualis
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How to cite this article:

Ratna U. Thosar, Indu Sawant, Vijayshree M. Chavan, Sanjay D. Sawant, Sujoy Saha and Vikram Suthakar, A. 2020. Generation of a Bio-intensive Strategy using Chitosan Formulations and Ampelomyces quisqualis for the Management of Powdery Mildew of Grapes.Int.J.Curr.Microbiol.App.Sci. 9(10): 1190-1201. doi: https://doi.org/10.20546/ijcmas.2020.910.143