EFFECTS OF Meloidogyne incognita INOCULUM DENSITY AND APPLICATION RATE OF Paecilomyces lilacinus ON BIOCONTROL EFFICACY OF BIOAGENT AGAINST ROOT KNOT OF BRINJAL
Date
2013-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Department of Plant Pathology
Abstract
The experiment was conducted in shade house of Department of Plant Pathology,
Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, during the period from
October 2011 to May 2013 to study effects of Meloidogyne incognita inoculum
density and application rate of Paecilomyces lilacinus on biocontrol efficacy of
bioagent against root knot nematode of brinjal. Four doses of Paecilomyces lilacinus,
viz., 0 CFU/g soil, 1×10
5
CFU/g soil, 5×10
5
CFU/g soil, 1×10
6
CFU/g soil and five
inoculum level of M. incognita, viz., 0 eggs/100 cm
3
of soil, 400 eggs/100 cm
of soil,
800 eggs/100 cm
3
of soil, 1600 eggs/100 cm
3
of soil, and 3200 eggs/100 cm
of soil
were used to conduct this experiment. The experiment was laid out in Randomized
Complete Block Design
5
CFU/g soil enhance plant growth parameters.
Inoculation of Meloidogyne incognita reduced plant growth and the reduction was
increased with the increase of inoculum density of Meloidogyne incognita. Maximum
plant growth reduction was recorded when 3200 eggs/100 cm
3
of soil was inoculated.
The maximum plant growth was recorded in a combined application of Paecilomyces
lilacinus 1×10
5
CFU/g soil with 400 eggs of Meloidogyne incognita/100 cm
of soil.
Minimum gall index
6
CFU/g soil when crop was challenged with Meloidogyne incognita
3
3
3
3
3
@ 400 eggs/100 cm
3
of soil. The highest reproduction factor
3
of soil. Application of 5×10
CFU/g soil of
Paecilomyces lilacinus resulted lowest reproduction factor
of soil. The
application of P. lilacinus @ 1×10
6
CFU per g soil reduced máximum 72% gall index
and 84% egg masses when the crop was challenged with 800 eggs/100 cm
soil. The
dose 5×10
5
CFU/g soil of P. lilacinus showed effectiveness to reduce reproduction
factor of M. incognita upto 89.6 and 85% when the crop was challenged with 800
eggs and 3200 eggs of the pest/100 cm
3
soil, respectively.
5
3
3
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: JANUARY-JUNE, 2013
Keywords
Meloidogyne incognita, Paecilomyces lilacinus, BIOCONTROL EFFICACY, ROOT KNOT, BRINJAL