ABSTRACT
This chapter provides information on diseases of Redgram / Pigeon pea / Arhar - Cajanus cajan, their symptoms, pathogen characters, epidemiology, and management. The diseases covered are Wilt, Dry root rot, Powdery mildew, Stem blight, Leaf spot and Sterility mosaic disease. Microconidia are hyaline, small, elliptical or curved, single celled or two celled. Macroconidia are also hyaline, thin walled, linear, curved or fusoid, pointed at both ends with 3-4 septa. The fungus survives in the infected stubbles in the field. Conidiophores are hyaline, short, obpyriform to cylindrical, develop from the inner walls of the pycnidium. The pathogen survives as sclerotia in the soil as facultative parasite and in dead host debris. The conidiophores, which arise through stomata, are hyaline, long, non septate, slender and rarely branched and bear single conidium at the tip. The conidia are hyaline, single celled and elliptical or clavate. The fungus survives in the soil through cleistothecia and asco.
