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Phytophthora Stem Blight of Cajanus cajan. F. J. Williams, Agricultural Research Advisor, United States Agency for International Development, Islamabad, Pakistan; K. S. Amin(2), and B. Baldev(3). (2)Plant Pathologist, All-India Coordinated Rice Improvement Project, Rajendranagar, Hyderabad, India; (3)Pulse Physiologist, Indian Agricultural Research Institute (IARI), New Delhi, India. Phytopathology 65:1029-1030. DOI: 10.1094/Phyto-65-1029.

A new stem blight disease of Cajanus cajan was first observed in experimental plots in India in 1966, and was epiphytotic at New Delhi in 1969. It is capable of causing widespread damage. Symptoms are dark-brown to black lesions which partially or entirely encircle the stem at the base or on branches up to a meter above soil level. Rapid wilting of foliage occurs above the lesion. The pathogen appears to be a new species of Phytophthora.

Additional keywords: pathogenesis, host plants, symptomatology, pathogen characteristics.