Vol. 3 (1) : January-February 2012 issue
Green Farming Vol. 3 (1) : 87-88 (January-February, 2012)
In vitro evaluation of plant extracts against bacterial blight of pomegranate (P. granatum)
P.S. AHER1*, A.N. SHIVANGIKAR2, Y.S. SHINDE3, C.S. MOGAL4 and D.P. KAKADE5
Deptt. of Crop Science, K.K. Wagh College of Agricultural Biotechnology, Sarswati Nagar, Nashik - 422 003 (M.S.)
Designation : 1,2Asstt. Professor *(prajaktapachorkar@gmail.com), 3Microbiologist, 4,5U.G. Student
Subject : Crop Science
Paper No. :
Total Pages : 2
Received : 19 December 2011
Revised accepted : 30 January 2012
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Citation :
P.S. AHER, A.N. SHIVANGIKAR, Y.S. SHINDE, C.S. MOGAL and D.P. KAKADE. 2012. In vitro evaluation of plant extracts against bacterial blight of pomegranate (P. granatum). Green Farming Vol. 3 (1) : 87-88 ; January-February, 2012
ABSTRACT
Plant extracts are known for safe, eco-friendly and cost effective means of managing the crop diseases effectively. Considering the vast potentiality of plants as antibacterial agents, a systematic investigation was undertaken to screen the antibacterial activity of nine different plants viz., Allium cepa, Allium sativum, Azadirachta indica, Clerodendron inarmae, Curcuma longa, Lantana camera, Ocimum sanctum, Parthenium hysterophorus and Zingibar officinale against Xanthomonas axonopodis pv. Punicae. The garlic bulb extract was found very effective in inhibiting the maximum growth of the pathogen by 9 mm diameter followed by parthenium leaf extract (8mm), onion bulb extract (7mm) and lantana leaf extract (6 mm).. Ocimum leaf extract was found moderately effective with an inhibition zone of 5 mm diameter. The other plant extracts viz., turmeric rhizome extract, zinger rhizome extract, clerodendron leaf extract and neem seed extract were observed completely ineffective with zero efficacy. Thus, it reveals that bioactive compounds like alkaloids,
flavonoids, terpenoids etc. may be the cause of inhibition and can easily be isolated in presence of water.
Key words :
Antibacterial activity, bacterial blight, plant extracts, pomegranate, Punica granatum, Xanthomonas axonopodis pv. Punicae
