Effect of duration of pigeonpea cultivars and intercropping on pod borders.
The effects of intercropping pigeon pea cultivars ICPL84031 (short duration), PRG-100 (medium duration) and LRG-30 (long duration) with sorghum, green gram and castor (Ricinus communis) on the occurrence of Helicoverpa armigera, Maruca vitrata, Exelastis obtusa and Melanogromyza obtusa were determined in Hyderabad, India during the rainy seasons of 1999-2000. Pod damage by H. armigera, E. atomosa and Melanogromyza obtusa increased with longer duration of pigeon pea cultivars, whereas that of Maruca vitrata was highest in the short duration cultivar. Intercropping with castor and sorghum reduced pod damage by Melanogromyza obtusa, Maruca vitrata and Helicoverpa armigera. Lepidopteran damage was lowest in the short duration cultivar and highest in the long duration cultivar.