Interaction of Fusarium oxysporum f. sp. ciceri and Meloidogyne javanica on Cicer arietinum

Authors

  • T. Uma Maheswari
  • S. B. Sharma
  • D. D. R. Reddy
  • M. P. Haware

Abstract

Interaction of Meloidogyne javanica and Fusarium oxysporum f. sp. ciceri was studied on Fusarium wilt-susceptible (JG 62 and K 850) and resistant (JG 74 and Avrodhi) chickpea cultivars. In greenhouse experiments, inoculation of M. javanica juveniles prior to F. oxysporum f. sp. ciceri caused greater wilt incidence in susceptible culfivars and induced vascular discoloration in roots of resistant cultivars. Nematode reproduction was greatest (P = 0.05) at 25ºC. Number of galls and percentage of root area galled increased when the temperature was increased from 15ºC to 25ºC. Wilt incidence was greater at 20ºC than at 25ºC. Chlorosis of leaves and vascular discoloration of plants did not occur at 15ºC. The nematode enhanced the wilt incidence in wilt-susceptible cultivars only at 25ºC. Interaction between the two pathogens on shoot and root weights was significant only at 20ºC, and F. o. ciceri suppressed the nematode density at this temperature. Wilt incidence was greater in clayey (48% clay) than in loamy sand (85% sand) soils. The nematode caused greater plant damage on loamy sand than on clayey soil. Fusarium wilt resistance in Avrodhi and JG 74 was stable in the presence of M. javanica across temperatures and soil types. Key words: Chickpea, Cicer arietinum, Fusarium oxysporum, interaction, Meloidogyne javanica, predisposition, root-knot nematode, soil type, temperature.

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Published

1997-03-15

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Section

Articles