Record Details

Bio-management of root-knot nematode, [Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949] on sunflower (Helianthus annuus L.)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Bio-management of root-knot nematode, [Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949] on sunflower (Helianthus annuus L.)
 
Creator SYEDA SAMINA, ANJUM
 
Contributor REDDY, B M R
 
Description Root-knot nematode (Meloidogyne incognita) is one of the important
plant parasitic nematode on sunflower that can cause severe economic
damage. In order to avoid excess use of chemicals, investigations were
carried out on isolation of bioagents from sunflower rhizosphere in and
around Bengaluru, in vitro evaluation of isolated bioagents against
M. incognita and its bio-management using bioagents singly and in
combinations with organic amendments under field conditions.
Important microbial agents viz., Trichoderma viride, T. harzianum,
Aspergillus niger, Pseudomonas fluorescens and Bacillus subtilis were
identified and pure cultures were maintained. Isolated bioagents were
tested both under in vitro and field condition for their efficacy on egg
hatching and larval mortality of M. incognita in addition to the growth,
development and yield of sunflower. Among bioagents tested, maximum
inhibition of egg hatching was recorded in T. viride and B. subtilis and
maximum larval mortality in T. viride and T. harzianum under in vitro. In
field studies, maximum plant height, root length fresh and dry root
weight and seed yield recorded in combination treatments of T. viride
@20g/m2(2 ×106 Cfu/g) with neem cake @10g/m2 followed by B. subtilis
@20g/m2(1×108 Cfu/g) with pongamia cake @10g/m2 treated plants than
individual treatments. Minimum nematode population in soil and root
and maximum reduction of galls, egg masses per root system and
eggs/eggmass were recorded in combination treatments of T. viride
@20g/m2(2 ×106 Cfu/g) with neem cake @10g/m2 followed by B. subtilis
@20g/m2(1×108 Cfu/g) with pongamia cake @10g/m2 treated plants than
individual treatments.
 
Date 2016-12-06T10:42:40Z
2016-12-06T10:42:40Z
2012-07-30
 
Type Thesis
 
Identifier Th-10239
http://krishikosh.egranth.ac.in/handle/1/89259
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences GKVK, Bangalore