Host plant resistance to insect pests in pigeonpea:Potential and limitations uri icon

abstract

  • Host plant resistance to insects isone of the components of pest managementin pigeonpea. Considerable progress hasbeen made in developing techniques toscreen for resistance to Helicoverpa armigera.However, some of these techniques cannotbe used to evaluate material for resistance tospotted pod borer, Maruca virtrata, pod fly,Melanagromyza obtusa, pod wasp,Tanaostigmodes cajaninae and the pod bugs,Clavigralla spp. Genotypes with resistance toH. armigera, M. vitrata, M. obtusa, and C.chinensis have been identified, but the levelsof resistance are low to moderate in thecultivated germplasm. However, high levelsof resistance have been identified against H.amigera in wild relatives of pigeonpea.Considerable information has beengenerated on mechanisms of resistance to H.armigera and M. vitrata, but there is limitedinformation on inheritance of resistance, andthe molecular markers associated withresistance to insects. The progress intransferring insect resistance into theimproved varieties has been limited, andthere is a need to introgress resistance genesfromthe wild relatives into the culigen andor develop pigeonpea cultivars expressing Btgenes to confer resistance to pod borers.Cultivars with moderate levels of resistancein combination with other components ofpest management will play a major role inincreasing the productivity of pigeonpea

publication date

  • 2016