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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
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.2018.7(6): 1551-1556
DOI: https://doi.org/10.20546/ijcmas.2018.706.185


Refinement of Technology for the Management of Collar Rot in Apple
Bhupesh Gupta1*, Usha Sharma2 and Shalini Verma1
1Department of Plant Pathology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan 173230 Himachal Pradesh, India
2Regional Horticultural Research and Training Station, Mashobra, Shimla – 171007 (HP), India
*Corresponding author
Abstract:

Collar rot in apple caused by Phytophthora cactorum is a major threat to the successful cultivation of crop. The incidence of disease is 13.27 per cent in Shimla and 8.31 per cent in Kinnaur districts of Himachal Pradesh. On farm trials for two consecutive years were conducted to assess and refine the existing technology for the management of the disease by integrating agrochemicals with Trichoderma viride which included three drenchings in rainy season with following treatments T1 [metalaxyl (8%) + mancozeb (64%) @0.5%], T2 [mancozeb (75%) @ 0.5%], T3 [Trichoderma viride @0.5%], T4 [one drenching with metalaxyl (8%) + mancozeb (64%) @0.5% followed by two drenchings with Trichoderma viride @0.5%], T5 [one drenching with mancozeb (75%) @ 0.5% followed by two drenchings with Trichoderma viride @0.5%] and T6 [Control/farmers’ practice]. Beside fungicide drenching, cultural practices were improved i.e. improvement in water drainage system in tree basin, opening of collar region of affected plant and removal of infected portion of roots with application of Chaubatia paste on open cuts. Among all the treatments, maximum percent lesion healing i.e. 37.65 per cent and 33.80 per cent in 1st year of treatment, 60.77 per cent and 55.60 per cent healing in second year of treatment was observed in plants drenched with T4 [one drenching with metalaxyl (8%) + mancozeb (64%) @0.5% followed by two drenchings with Trichoderma viride @0.5%] in Kinnaur and Shimla districts, respectively.


Keywords: Collar rot, Phytophthora cactorum, Trichoderma viride, Integrated management
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How to cite this article:

Bhupesh Gupta, Usha Sharma and Shalini Verma. 2018. Refinement of Technology for the Management of Collar Rot in Apple.Int.J.Curr.Microbiol.App.Sci. 7(6): 1551-1556. doi: https://doi.org/10.20546/ijcmas.2018.706.185