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Influence of Streptomyces fradiae against Root knot nematode Meloidogyne incognita in Tomato

Author Affiliations

  • 1Department of Nematology, Tamil Nadu Agricultural University, Coimbatore -641003, Tamil Nadu, INDIA
  • 2Department of Nematology, Tamil Nadu Agricultural University, Coimbatore -641003, Tamil Nadu, INDIA

Res. J. Agriculture & Forestry Sci., Volume 3, Issue (1), Pages 6-11, January,8 (2015)

Abstract

A protected and field experiment was conducted to evaluate the biocontrol potential of the optimized culture filtrates of Streptomyces fradiae against root-knot nematode Meloidogyne incognita in tomato. The fermentation medium of S. fradiae optimized with pH 6 at 35oC with starch and yeast extract as carbon and nitrogen sources respectively maximized the colonization rate of S. fradiae. The culture filtrate of the optimized medium of S. fradiae resulted in higher degree of inhibition in egg hatching, and mortality of juveniles of M. incognita. The effectiveness of optimized medium of S. fradiae against M .incognita is related to higher production of secondary metabolites subsequent to maximization of colonization. The S. fradiae experimented for the management of M. incognita under protected and field conditions revealed its effectiveness for the suppression of M .incognita population and to reduce the severity of nematode disease in terms of gall index. The suppression in M. incognita population / incidence following the application of S. fradiae resulted in significant improvement in yield attributes including fruit yield of tomato.

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