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Journal of Agricultural Science and Botany | Volume: 2
November 15-16, 2018 | Paris, France
Plant Science
Natural Products,Medicinal Plants and Traditional Medicines
International Conference on
Joint Event
&
Role of abiotic factors on the epidemiology of wilt of pomegranate caused by Ceratocystis fimbriata
Raghavendra K Mesta
University of Horticultural Sciences, India
Wilt of pomegranate caused by Ceratocystis fimbriata Ellis
and Halst. is a major threat in the successful cultivation
of the crop in northen Karnataka state of India. A study on the
role of soil and weather parameters on the development of this
disease was conducted at University of Horticultural Sciences,
Bagalkot, India. The survivability of C. fimbriata in host debris
at different environmental conditions revealed the fungus
survived in infected host debris up to 34, 22 and 28 weeks at
different conditions viz., refrigeration, room temperature and
field condition. Soil temperature on C. fimbriata was tested
and per cent colonization of the fungus was maximum at 250C
(89.67 % colonization), while it was minimum at 350C (7.00 %
colonization) and 150C (6.33 % colonization). There was no
growth obtained at 100C and above 400C. The cent per cent
disease incidence was recorded at moisture level of 50, 60
and 70 per cent. The result indicated that the per cent disease
incidence was 10.00 in the month of October, 2015, which
reached a peak of 82.50 per cent in the month of September
2016. Similarly the highest AUDPC (142.50 per cent) and
apparent rate of infection ‘r’ (0.13) also reached maximum in
the month of September 2016. Multiple regression equation
developed to establish relationship between weather
parameter and per cent disease incidence of wilt, revealed that
all the weather parameters contributed to significant variation
in per cent disease incidence. The equation developed is Y=
117.784 + 0.452RF – 6.162Tmax + 6.914Tmin – 0.605RH with
co-efficient of determination (R2) of 44 per cent. Further, step
wise multiple regression analysis indicated that the weather
parameters explained 44.94 per cent variation in per cent
disease incidence. The rainfall explained a maximum of 30.66
per cent of total variation in disease incidence.
Speaker Biography
Raghavendra K Mesta did his Ph.D. from University of Agricultural Sciences, Dharwad,
India. He is presently serving as Professor and Head, Department of Plant Pathology,
University of Horticultural Sciences, Bagalkot, India. He has published more than 50 papers
in reputed journals.
e:
Raghavendra K Mesta, Plant science & Natural Medicine 2018, Volume 2
DOI: 10.4066/2591-7897-C1-002