Abstract:
The effectiveness of different dose of Purpureocillium lilacinum was evaluated
against tomato root knot pathogen Meloidogyne incognita at different level. The
pot experiment was conducted over two months in shade house on tomato crops,
cv. BARI Tomato-14. Pots treated with different doses (0, 1×10
and 5×10
5
CFU/g soil)
of P. lilacinum during transplanting of tomato. After three
days different inoculum density (0, 250, 500, 1000 and 2000 eggs per 100 g soil)
of M. incognita inoculated against each doses. The optimum dose against
nematode protection was considered at concentration of 5×10
4
CFU/g soil where
other doses gave statistically similar result. A significant correlation was recorded
between doses of P. lilacinum and inoculum level of M. incognita. P. lilacinum at
lower rate (5×10
4
CFU/g soil) reduced root galling by 76.53% when 250 eggs of
M. incognita were inoculated per 100 g soil. The highest reduction of number of
egg masses per root and reproduction factor (Rf) by 91.13 and 79.32%,
respectively was observed when 2000 eggs per 100 g soil was challenged by
5×10
4
CFU/g soil of P. lilacinum. However, highest colonization rate of egg
masses by bioagent was observed at 5×10
5
CFU/g soil with about 45.19% when
pots inoculated with 1000 eggs per 100 g soil. The experiment demonstrated that
P. lilacinum was effective in suppression of root knot nematode on BARI Tomato14
and
can
be
an
important
component
of
eco-friendly
management
strategies
4
, 5×10
4
, 1×10
5
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In partial fulfillment of the requirements
For the degree of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
SEMESTER: JULY-DECEMBER, 2013
