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 |
A survey on rhizome rot disease of turmeric (Curcuma longa L.) was conducted during 2016-2017 in the major turmeric growing tracts of Andhra Pradesh. A total of 48 different locations of Guntur, Kadapa, Kurnool, West Godavari and Visakhapatnam districts in Andhra Pradesh were covered during the survey. Among the five districts of A.P, the highest per cent disease incidence was recorded in Atmakur (45.56%) of Mangalagiri mandal followed by Gundlapalem (32.22%) and Visadala (25.67%) of Medikondur of Guntur district and two locations in Kurnool, Visakhapatnam and one location in Guntur recorded no disease incidence (0%). According to the information collected, the highest disease incidence and spread of the disease often coincided with the monsoon season of the respective locations. Differences were noted on the system of cultivation, practices of crop rotation and crop protection strategies among the different locations during the survey. The analysis of rhizome rot samples collected during the survey revealed that Fusarium solani is the predominant organism actively involved in the rhizome rot disease. Pythium aphanidermatum is the other organism found frequently associated with the infected samples. Out of 144 samples, 56 samples (38.88%) showed Pythium sp. alone and 88 samples (61.11%) showed Fusarium sp. alone. The pathogenicity studies of these isolates may prove the role of these organisms for the exact cause of rhizome rot disease in turmeric.
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