Crop improvement, Genetic Resources, Pests and diseases
Grain legumes, Pigeonpea
Asia, Eastern and Southern Africa, West and Central Africa
Improving pod borer complex tolerance in cultivated pigeonpea(Cajanuscajan) by using wild Cajanusspecies
Crop wild relatives, Pigeonpea, Antibiosis; Antixenosis; Cajanus cajan; Helicoverpa armigera; Pigeonpea; Pod borer; Trichome;Cajanus scarabaeoides; Insect resistance
Genetic Gains Program
Dr Shivali Sharma
Pod borer (Helicoverpa armigera Hübner) is the single largest yield reducing factor in food legumes. Worldwide, pod borer causes an estimated loss of over $2 billion annually, despite over $1 billion value of insecticides used to control this devastating pest. In pigeonpea(Cajanuscajan(L.) Millsp.), an important food grain legume crop of the semi-arid tropics, Helicoverpa armigera causes maximum yield losses (25-70%) followed by pod fly, Melanagromyzaobtusa(10-50%), Marucavitrata(5-25%) and pod bug, Clavigrallagibbosa(10-30%). High levels of resistance to pod borer is not available in the cultivated genepool, which necessitates the exploitation of new anddiverse sources of variations.