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Disease Note.

New Records of Long Smut, Caused by Tolyposporium ehrenbergii, of Sorghum in Southern Africa. W. A. J. de Milliano, Regional Sorghum and Millet Improvement Program, Box 776, Bulawayo, Zimbabwe. E. Mtisi, G. M. Kaula, B. Matalaote, A. M. Mbwaga, and F. S. Msiska. Plant Protection Institute, Box 8100, Causeway, Harare, Zimbabwe; Mt. Makulu Central Research Station, Bag 7, Chilanga, Zambia; Department of Agricultural Research, Bag 0033, Gaborone, Botswana; Ilonga Agricultural Research Institute, Kilosa, Tanzania; and Ngabu Research Station, Box 48, Ngabu, Malawi. Plant Dis. 75:101. Accepted for publication 6 July 1990. Copyright 1991 The American Phytopathological Society. DOI: 10.1094/PD-75-0101E.

During surveys in 1985-1989, long smut, caused by Tolyposporium ehrenbergii (Kuhn) Patouillard, on sorghum (Sorghum bicolor (L.) Moench) was observed in Malawi, Tanzania, Botswana, Zambia, and Zimbabwe, the last three being new records. Incidences were high (above 50%) only in Tanzania (Hombolo, 1987) and Botswana (Gaborone, 1988). Long smut appeared annually during 1987, 1988, and 1989 in Ngabu, Malawi, and Hombolo, Tanzania. The disease occurred near Dodoma and Shinyanga in Tanzania, in the Zambezi Valley (1985) and near Chiredzi (1989) in Zimbabwe, and near Gaborone (1987, 1988) in Botswana. It was present in the Zambezi Valley near Lusitu, Zambia, in 1987 and 1989. Local and introduced sorghum cultivars and hybrids were affected, including the newly released cultivars ZSV 1 (= ICSV 2 = SPY 386) from Zambia and SV 1 (= ICSV 112 = SPY 475) from Zimbabwe.