Submitted to: Journal of the American Society for Horticultural Science
Publication Type: Book / Chapter
Publication Acceptance Date: 8/1/2001
Publication Date: 12/1/2001
Citation: Chen, J., Copes, W.E., Miller, R.W., Lamikanra, O. 2001. Diseases (chapter 10) in. muscadine grapes. ASHS Press. 158-209 Interpretive Summary: no interpretive summary is required
Technical Abstract: The chapter is an extensive review of preharvest biotic disorders (angular leafspot, bitter rot, black rot, crown gall, eutypa canker, macrophoma rot, nematodes, Pierce's disease, powdery mildew, ripe rot, russet, rust, and septoria leafspot) specifically on muscadine grape. Coverage of each disease includes a short history, description of the pathogen, and description of disease symptoms and seasonal development. Abiotic disorders, such as low and high light intensity, low and high temperature, excessive and insufficient water, genetic abnormalities, chemical toxicities, and air pollution, are reviewed relative to how they affect disease severity and can be confused with disease symptoms. Selection of fungicides is described prior to detailed discussion about timing of sprays, fungicide resistance strategies, and types of application. Cultural treatments, such as site selection, resistant cultivars, row orientation, weed control, pruning, and sanitation, are covered individually, then considered in combination as part of integrated disease management (IDM) schemes. Tables listing cultivar resistance and the relative efficacy of fungicides and a graph showing the relative seasonal abundance of pathogen dispersal are provided to help individualize IDM control. The causes of postharvest microbial and physiological deterioration of muscadine grape are reviewed, with descriptions of the use of low temperature and chemical treatments to maintain high quality fruit.