Control of sorghum diseases in the tropics
1987
Jensen, S.G. | Frederiksen, R.A.
Three methods of control are recommended for sorghum diseases in the tropics: host plant resistant, cultural practices and chemical pesticides. The first is the most practical and should be used whenever possible. Because of the large number of diseases encountered, a multigenic approach should be taken. Screening for resistance to several viral, bacterial, and fungal leaf spot organisms can be accomplished at the same time selection is being made for resistance to smut and downy mildew. Selection for resistance to head molds may require special techniques because of environmental factors and the variety of organisms involved. Anthracnose leaf spot and stalk rot can be controlled by host plant resistance. Host plant resistance to other fungal stalk rots is not clearly defined, therefore, the best means of controlling Fusarium stalk rot and charcoal rot, is through the use of well adapted varieties and cultural practices that reduce stress from heat or drought. Little is reported about controlling bacterial soft rot. Cultural practices, such as 3-year crop rotation, can also provide some control of anthracnose, downy mildew, and head smut. Chemicals can provide fast and efficient control of downy mildew and loose or covered kernel smut if the farmer can be induced to plant treated seed.
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