Follow
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 2017 - IJCMAS--ICV 2017: 100.00 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2019) [Effective from January 1, 2019]For more details click here

Login as a Reviewer

Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

See Guidelines to Authors
Current Issues

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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(8): 2465-2474
DOI: https://doi.org/10.20546/ijcmas.2018.708.249


Studies on the Mode of Survival of Diplocarpon mali Causing Premature Leaf Fall of Apple
Anupam Goyal, J.N. Sharma and Sumitra Phurailatpam*
Department of Plant Pathology, Dr. Y. S. Parmar University of Horticulture and Forestry, Solan, India
*Corresponding author
Abstract:

Premature leaf fall is one of the most important diseases of apple particularly in Himachal Pradesh. Present studies were carried out with the objectives to study the mode of survival of Diplocarpon mali in the infected leaf litter, to study the effect of time of leaf fall, cultivar and environment on the perennation of Diplocarpon mali. Acervuli of Marssonina coronaria were found to occur in all the leaf samples while conidia formation started in or after May ranging from 1.2x103 to 5.8x103 conidia per ml at all the locations but its ascosporic stage and apothecia were not observed in any of the leaf samples. Leaves collected on September 28, 2013 produced the highest number of conidia (5x103 conidia/ml) in the summer and the conidial production started from pea stage of apple bud development and the maximum production of primary inoculum was observed at pre-harvest stage (9.2x103 conidia/ml). Maximum number of conidia was caught on the greased slides on 7th August 2014, when the temperature was 19ºC with ample rainfall and relative humidity above 85 per cent in the preceding 24 hours. Also, rainfall and relative humidity were significantly and positively correlated with number of conidia released in the apple orchard, whereas, the maximum temperature showed a negative correlation. Among the test apple cultivars, Golden Delicious produced maximum number of conidia in the overwintered leaf litter followed by Royal Delicious, Red Gold, Rich-a-Red, Scarlet Gala and Tydeman’s Early Worcester and Granny Smith respectively.


Keywords: Diplocarpon mali, Perennation, Time of leaf fall, Cultivar and environment
Download this article as Download

How to cite this article:

Anupam Goyal, J.N. Sharma and Sumitra Phurailatpam. 2018. Studies on the Mode of Survival of Diplocarpon mali Causing Premature Leaf Fall of Apple.Int.J.Curr.Microbiol.App.Sci. 7(8): 2465-2474. doi: https://doi.org/10.20546/ijcmas.2018.708.249