First Report of Incidence of Stem Rot of Cowpea Caused by Pythium aphanidermatum from Kerala, India and its Management

Publication Date : 22/02/2016


Author(s) :

MOHAMED ANEES M. , C. Gokulapalan , K. N. Anith.


Volume/Issue :
Volume 2
,
Issue 2
(02 - 2016)



Abstract :

Cowpea (Vigna unguiculata sub.sp. sesquipedalis (L.) Verdcourt.) has come to occupy a prime position among the vegetable crops raised in Kerala in coverage and popular preference. During November 2012, high incidence of stem rot symptoms were observed in cowpea grown in open field conditions at the Department of Olericulture, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala, India. The disease was identified to be Pythium stem rot caused by Pythium aphanidermatum. The pathogen also showed symptoms in snake gourd, chilli, tomato and amaranthus, when artificially inoculated. Management experiments revealed that application of metalaxyl MZ and azoxystrobin recorded the lowest incidence of the disease in term of Percentage Disease Incidence, followed by fungicide copper oxychloride and fish amino acid. KAU released bioagents Trichoderma harzianum and P. fluorescens, and panchagavyam were also able to suppress the disease. It was also found that all growth and yield parameters except plant dry weight were the maximum with the plants treated with the systemic fungicide azoxystrobin.


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