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Plant Pathology Journal
  Year: 2020 | Volume: 19 | Issue: 2 | Page No.: 77-88
DOI: 10.3923/ppj.2020.77.88
 
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In vitro Evaluation of Fungicides and Plant Extracts to Control Purple Blotch Disease of Onion in Pakistan

Nisar Uddin , Abdul Naseer, Muhammad Shahid, Noor Muhammad and Niaz Ali

Abstract:
Background and Objective: Purple blotch caused by A. porri (Ellis) Cif. is a devastating disease of onion (Allium cepa L., 2n =16) throughout the world. This study compared effectiveness of the most frequently used fungicides and different plant extracts as control measures for the purple blotch disease. Materials and Methods: The fungal inhibition potential of leaf extracts was evaluated from 7 plants, indigenous to District Swat as well as the commonly available fungicides under laboratory conditions. Multivariate analysis and the ANOVA results revealed a direct relationship for the plant extracts/fungicides application and mycelial inhibition. Results: The extracts of C. sativa (1 and 2 ppm) was found the most effective and caused over 91.89 and 91.66% inhibition of mycelial growth. The order of efficacy of the 1 ppm plant extract was followed by D. mucronata (79.00%), D. viscosa (78.99%), C. procera (77%), J. adhatoda (60.65%) and A. altissima (57.98%), while in 2 ppm 83.14% was followed by 82.09, 82.02, 71.33, 55.05 and 39.32%, respectively. Among the 5 fungicides applied, DuPontTM Curzate® M8 in both concentrations were the most effective and caused over 89.88% inhibition. Potential synergy of the of leaf extracts of C. sativa+J. adhatoda was highly effective, resulted in 80 and 84.28% mycelial inhibition. Conclusion: The results highlight the critical role of finding the right proportion of appropriate compounds to perform as a potential pesticide. These results indicate to the importance of phyto extracts as promising alternatives to synthetic fungicides for being cost effective, eco-friendly and sustainable means of controlling the purple blotch of onion.
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How to cite this article:

Nisar Uddin, Abdul Naseer, Muhammad Shahid, Noor Muhammad and Niaz Ali, 2020. In vitro Evaluation of Fungicides and Plant Extracts to Control Purple Blotch Disease of Onion in Pakistan. Plant Pathology Journal, 19: 77-88.

DOI: 10.3923/ppj.2020.77.88

URL: https://scialert.net/abstract/?doi=ppj.2020.77.88

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