Indian Journal of Nematology
SCOPUS
  • Year: 2013
  • Volume: 43
  • Issue: 1

Evaluation of Heterocystous and Non Heterocystous Cyanobacterial Species for Nematicidal Activity

  • Author:
  • Prasanna Holajjer1,, Anju Kamra, H.S. Gaur, Dolly Wattal Dhar2
  • Total Page Count: 6
  • Page Number: 34 to 39

1Crop Protection Unit, Directorate of Groundnut Research (DGR), Junagadh-362001, Gujarat, India

2Centre for Conservation and Utilisation of Blue Green Algae (CCUBGA), Indian Agricultural Research Institute (IARI), New Delhi-110 012, India

*Corresponding author, E-mail: prasannaiari@gmail.com

Online published on 22 July, 2013.

Abstract

Nematicidal potential of ten terrestrial heterocystous and non heterocystous cyanobacteria were compared against root-knot nematode, Meloidogyne incognita J2s. The extracts of all the ten unsonicated cyanobacteria caused an average immobility of 4.8–22.9% and mortality of 1.5–5.6% which increased to 88.2–96.5% and 4.2–29.3% on sonication, respectively. The highest per cent mean mortality was observed in S. nidulans (29.3) followed by P. tenue (26.8), M. tenera (25.8), T. nodosa (22.6), M. vaginatus (21.3), S. bohmeri (17.5), N. punctiforme (6.5), A. variabilis (5.6), C. brevissima (5.1) and least in H. luteolus (4.2); with an increase in exposure time from 24 to 72h. The immobility and mortality were significantly higher in sonicated extracts compared to unsonicated extracts.

Keywords

cyanobacteria, extracts, heterocystous, non heterocystous, immobility, mortality. Meloidogyne incognita