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

abstract

  • Interaction of Meloidogyne javanica and Fusarium oxysporum f. sp. cice~q was studied on Fusariumwilt-susceptible (JG 62 and K 850) and resistant (JG 74 and Avrodhi) chickpea cultivars. Ingreenhouse experiments, inoculation of M. javanicajuveniles prior to F. oxysporum f. sp. ciceri causedgreater wilt incidence in susceptible culfivars and induced vascular discoloration in roots of resistantcultivars. Nematode reproduction was greatest (P = 0.05) at 25 °C. Number of galls and percentage ofroot area galled increased when the temperature was increased from 15 °C to 25 °C. Wilt incidence wasgreater at 20 °C than at 25 °C. Chlorosis of leaves and vascular discoloration of plants did not occur at15 °C. The nematode enhanced the wilt incidence in wilt-susceptible cultivars only at 25 °C. Interactionbetween the two pathogens on shoot and root weights was significant only at 20 °C, and F. o. cicerisuppressed 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 thanon clayey soil. Fusarium wilt resistance in Avrodhi and JG 74 was stable in the presence of M. javanicaacross temperatures and soil types

publication date

  • 1977