Deciphering Components of Wilt Complex in Pomegranate: A Case Study Based on Survey in Northern Karnataka

Components of Wilt Complex in Pomegranate

Abstract

Fixed plot survey of 47 orchards were undertaken
in major pomegranate growing areas of northern Karnataka
comprising Bagalkote, Belagavi, Gadag, Koppal, and
Vijayapura districts during 2017 and 2018 for recording the
prevalence of wilt complex. The wilt incidence was noticed
in all the surveyed locations except one, thus depicting
range from zero to 46.3%. Among the districts surveyed, the
maximum mean wilt incidence was recorded in Bagalkote
(19.2%), followed by Belagavi (17.8%), whereas the least
wilt incidence was recorded in Koppal (7.0%) district. In
addition to wilt, maximum root knot nematode population
(Meloidogyne incognita) was observed in Gadag district with
a mean population of 2.7 cc-1 soil sample. Out of 47 orchards,
the association of C. fimbriata (C), F. oxysporum (F), M.
incognita (M), and shot hole borer was observed in 13 places.
Association of C + F + S at 11 places, C + F + M at 1 place, C
+ F at 10 places, C+M at 3 places, C + S and F + M at 1 place
each, C alone in 7 places and F alone in 1 place was recorded.
M. incognita alone did not cause wilting of plant. Infestation of
shot hole borer alone or with F. oxysporum or M. incognita was
not observed in this study. This study clearly indicated that
where the per cent disease incidence was higher, there was an
association of nematode and shot hole borer.