Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 9:783-784 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Reaction of Sweet Sorghum Varieties to Downy Mildew (Sclerospora sorghi Weston and Uppal) in Texas1

Natale Zummo, O. H. Coleman, Billy L. Jones, R. A. Frederiksen and A. J. Bockholt2

Resistance to downy mildew was found in sweet sorghum. Eleven of 51 entries grown at Beeville, College Station, and Weslaco, Texas, in 1968 did not show symptoms of the disease. Ten of these 11 varieties had one or more of the following varieties as one parent: Mn 1054, MN 1060, and MN 1500. Some plants of Mer. 64-7 and Mer. 67-12 infected with downy mildew were elongated (taller than healthy plants) whereas other diseased plants in the same plots were stunted.

Key Words: Disease resistance • soil infection • foliar infection

1 A joint contribution of the United States Department of Agriculture, The Texas Agricultural Experiment Station, T.A. 7619, and the Mississippi Agricultural Experiment Station.

2 Research Plant Pathologist and Research Agronomist, Crops Research Division, Agricultural Research Service, United States Department of Agriculture; Assistant Professor, Texas A and M University Research and Extension Center at Weslaco; Assistant Professors, Department of Plant Sciences and Department of Soil and Crop Sciences, College Station, Texas.

Received for publication May 2, 1969.




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Copyright © 1969 by the Crop Science Society of America.