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Studies on jatropha moaic virus disease

KrishiKosh

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Title Studies on jatropha moaic virus disease
 
Creator K.Jayanna
 
Contributor A.S.Byadgi
 
Subject Plant Pathology
 
Description Jatropha (Jatropha curcas L.) is one of the important biodiesel crops grown
throughout the country. The Jatropha species suffer from several diseases, among them
Jatropha mosaic virus (JMV) disease is one of the limiting factor in Jatropha cultivation.
The survey was conducted to know the distribution of JMV in different parts of
Karnataka during 2005, the results revealed that there was 2.30 per cent to 31.40 per cent
disease incidence on commonly grown J. curcas and 6.00 per cent to 45.00 per cent on J.
gossypiifolia.
The infected plants were characterized by production of mosaic, yellow mosaic,
distorted leaves with reduction in leaf size, thickening of veins, puckering and crinkling of
leaves. Miniature leafy enations on the axial side of leaves and severe stunted growth of the
plants were also recorded.
The virus causing Jatroha mosaic disease was neither mechanically transmissible nor
through seeds, but it was transmitted through dodder, whitefly (Bemisia tabaci) and by
grafting. The virus had limited host range and produced mosaic, yellow mosaic and distorted
leaves on J. curcas and mosaic and leaf curling on J. gossypiifolia and the virus produced
yellow mosaic and leaf curling symptoms on Phaseolus vulgaris.
The biochemical analysis of diseased leaves indicated decrease in sugar with
increased phenol content. The virus had severe effect on the growth parameters which was
evident from the drastic reduction in plant height, inter-nodal length and petiole length in
case of early infection.
The yield parameters like number of fruits per plant, size of the fruit and number of
seeds per capsule, seed weight and number of pollens were also affected by JMV, accounting
for 78.03 per cent reduction in yield. The virus was found to affect the oil content (41.78 %
reduction) drastically over healthy plants. Among the different insecticides, monocrotophos
(1.5 ml/l) and confidor (0.25 ml/l) were reduced vector population and also disease incidence.
 
Date 2016-10-24T19:07:28Z
2016-10-24T19:07:28Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81661
 
Format application/pdf
 
Publisher UAS, Dharwad