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EVALUATION OF BOTANICALS AND PANCHAGAVYA AGAINST SELECTED FUNGAL DISEASES OF PADDY UNDER ORGANIC FARMING SYSTEM

KrishiKosh

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Title EVALUATION OF BOTANICALS AND PANCHAGAVYA AGAINST SELECTED FUNGAL DISEASES OF PADDY UNDER ORGANIC FARMING SYSTEM
 
Creator THIPPESWAMY, P. H.
 
Contributor Chandrashekar, S. C.
 
Subject null
 
Description The fungal diseases are largely being managed by using chemicals. However, the
fungicides have been posing many problems like resistance development in pathogens,
environmental pollution by residues etc. Hence to develop alternative methods of control
of fungal diseases which are eco-friendly, cost effective, biodegradable, easily accessible
and target specific, an investigation was undertaken to find out the effects of seven
selected plant extracts and panchagavya, which are known to possess antifungal
properties against phytopathogenic fungi. In vitro evaluation of botanicals and
panchagavya by poisoned food technique revealed that mixture of all the selected plant
extracts at 5 per cent concentration was found to be highly effective in inhibiting the
mycelial growth of Pyricularia oryzae to an extent of 51.11 per cent. Whereas, the leaf
extract of Pongamia pinnata was found to be very effective in inhibiting the mycelial
growth of Rhizoctonia solani to an extent of 55.55 per cent. Further the efficacy of plant
extracts and panchagavya were tested under field condition as foliar spray at 2 and 10 per
cent concentrations during kharif 2009 and summer 2010 respectively. Mixture of all the
selected plant extracts was found most effective in reducing the leaf blast severity by
47.21 and 68.27 per cent during kharif and summer seasons respectively and neck blast
incidence by 42.59 per cent during kharif season and there was no incidence of neck blast
during summer. The leaf extract of Pongamia pinnata at 2 per cent concentration was
found to be very effective in reducing the sheath blight severity by 67.90 per cent.
However, at 10 per cent concentration combination treatment was found superior with
per cent reduction of 70.58 over the control. Highest grain yield of 48.13 and 42.46q/ha
was recorded in the plots receiving foliar spray with combination of all the selected plant
species both at 2 and 10 per cent respectively. Highest total phenol content of 1.123mg/g
was noticed in the rice leaves of the plots receiving foliar spray in combination of all the
selected plant species.
 
Date 2017-06-20T06:44:55Z
2017-06-20T06:44:55Z
2010-07-15
 
Type Thesis
 
Identifier Th-9614
http://krishikosh.egranth.ac.in/handle/1/5810022025
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bangalore