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Integrated Disease Management of Foliar Blight Disease of Onion: A Case Study of Application of Confounded Factorials

Author

Listed:
  • Efath Shahnaz
  • V. K. Razdan
  • S. E. H. Rezwi
  • T. R. Rather
  • Sachin Gupta
  • Muneeb Andrabi

Abstract

Foliar blight is an important disease of onion, proving a major bottleneck in its production. Six pathogens were found associated with the disease, viz., Alternaria alternata, A. porri, A. tenuissima, Stemphylium vesicarium, Colletotrichum circinans and Cladosporium allii-cepae. Integrated disease management of the crop was attempted using chemicals (mancozeb at 0.25% and hexaconazole at 0.06%), bio-control agents, Trichoderma viride (Tv-1) and Trichoderma harzianum (Th-1), each at 1×109 spores-ml and phyto-extracts (Cannabis indica and Curcuma longa, each at 10%). Mancozeb at 0.25 per cent proved most effective in managing foliar blight of onion but was at par with hexaconazole at 0.06 per cent. Among bio-control agents used, application of T. harzianum (Th-1) resulted in lower disease intensity as compared to T. viride (Tv-1), though both were statistically at par with each other, but were significantly superior over the control. The phyto-extracts, C. indica and C. longa were ineffective in the disease management.

Suggested Citation

  • Efath Shahnaz & V. K. Razdan & S. E. H. Rezwi & T. R. Rather & Sachin Gupta & Muneeb Andrabi, 2012. "Integrated Disease Management of Foliar Blight Disease of Onion: A Case Study of Application of Confounded Factorials," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 5(1), pages 1-17, December.
    • Handle: RePEc:ibn:jasjnl:v:5:y:2012:i:1:p:17
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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