Resistance to Phytophthora Blight in the Improved Pigeonpea Lines at ICRISAT, Patancheru, India uri icon

abstract

  • Phytophthora blight (PB) (Phytophthora drechsleri Tuckerf. sp. cajani, Kannaiyan et al.) of pigeonpea (Cajanuscajan (L.) Millsp.) is a disease of endemic importance.Continuous rains and waterlogging in the seedling stageof the crop favour PB epidemics, resulting in up to 100%crop loss. Characteristic symptoms of the disease arewater-soaked lesions on the leaves and slightly sunkenlesions on stems and petioles. Lesions girdle the stem andthe foliage dries up. The disease was first reported in1968 at the research farm of the Indian AgriculturalResearch Institute (IARI) by Williams et al. (1968). LaterKannaiyan et al. (1984) reported its widespreadoccurrence in several parts of India

publication date

  • 2006