National Academy of Agricultural Sciences (NAAS)
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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 |
The objective of this study was to record the incidence of leaf blight of chrysanthemum caused by Alternaria alternata in Prayagraj city based on visual inspection and microscopic observation carried out during 2019-2020. During the investigation of Alternaria leaf blight disease was identified thoroughly and disease was severe. Alternaria leaf blight is one of the most important foliar diseases of chrysanthemum. It has become a major constraint in all the chrysanthemum growing areas. During this, survey was done on the several varieties for their disease incidence. The disease incidence varied from one variety to other, the disease incidence is as follows Puran white (66.66%), Detroit (83.33%), Dazzler (46.15%), White cotton ball (53.33%), Baggi (60%), Haldi ghati (69.23%) and Roll call (78.57%). The Mean plant disease incidence is 65.32%. However the total number of plants tagged is different from variety to variety. The growth characteristics of the varieties were also studied. With the obtained values the chi square test was also done where the value obtained is 2.85 as it is less than the tabulated value 12.59 at p=0.05, showing the results as non- significant as the plants surveyed are disease stressed. The disease needs special attention in devising protection strategies of the crop.
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