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EVALUATION OF HETEROCYSTOUS AND NON HETEROCYSTOUS CYANOBACTERIA FOR THEIR BIONEMATICIDAL POTENTIAL AGAINST ROOT-KNOT NEMATODE, Meloidogyne incognita

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Title EVALUATION OF HETEROCYSTOUS AND NON HETEROCYSTOUS CYANOBACTERIA FOR THEIR BIONEMATICIDAL POTENTIAL AGAINST ROOT-KNOT NEMATODE, Meloidogyne incognita
Ph D
 
Creator PRASANNA V. HOLAJJER
 
Contributor Anju Kamra
 
Subject cyanobacteria, biological phenomena, extraction, sexual reproduction, planting, irrigation, eggs, diseases, vegetative propagation, meloidogyne incognita
 
Description T-8232
Nematicidal activity of a terrestrial cyanobacterium, Synechococcus
nidulans was investigated. S. nidulans culture collected at weekly intervals for five weeks
revealed that sonication of 14 day culture caused the maximum immobility (94.2%) and
mortality (29.3%) in Meloidogyne incognita J2s, compared to controls (medium and
water). This extract, tested in vitro against infective stages and egg hatch of other plantparasitic
nematodes viz. M. graminicola, Heterodera cajani, H. avenae and
Rotylenchulus reniformis. Extracts of sonicated S. nidulans caused an average mean
immobility in the range of 91.3-98.4% in infective stages of the nematodes with no
significant difference with an increase in exposure time from 24 to 72h. The highest per
cent mean mortality was observed in M. graminicola (31.5) followed by M. incognita
(29.3), H. avenae (20.9) and R. reniformis (17.4) and/or H. cajani (17.4) with a
significant increase with the period of exposure from 24 to 72h. No significant
differences in mortality were observed between M. graminicola and M. incognita and
between H. avenae and H. cajani. The percent hatch inhibition over control (water) was
maximum in M. incognita (94.2), followed by H. avenae (91.6), H. cajani (72.3) and M.
graminicola (70.6) and least in R. reniformis (58.6)
 
Date 2016-09-28T19:11:42Z
2016-09-28T19:11:42Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/79395
 
Format application/pdf
 
Publisher IARI, DIVISION OF NEMATOLOGY