Bio-management of root-knot nematode, [Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949] on sunflower (Helianthus annuus L.)
KrishiKosh
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Title |
Bio-management of root-knot nematode, [Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949] on sunflower (Helianthus annuus L.)
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Creator |
SYEDA SAMINA, ANJUM
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Contributor |
REDDY, B M R
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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. |
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Date |
2016-12-06T10:42:40Z
2016-12-06T10:42:40Z 2012-07-30 |
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Type |
Thesis
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Identifier |
Th-10239
http://krishikosh.egranth.ac.in/handle/1/89259 |
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Language |
en
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Format |
application/pdf
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Publisher |
University of Agricultural Sciences GKVK, Bangalore
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