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ARS Home » Midwest Area » St. Paul, Minnesota » Plant Science Research » Research » Publications at this Location » Publication #289332

Title: Diseases of wild rice

item Samac, Deborah - Debby
item Castell-Miller, Claudia

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 2/10/2017
Publication Date: 2/1/2023
Citation: Samac, D.A., Castell-Miller, C.V. 2023. Diseases of wild rice. In: Hollier, C. A., Padgett, G. B. and Draper, M. A., editors. Diseases of Field Crops. St. Paul, Minnesota: APS Press. p. 373-381.

Interpretive Summary:

Technical Abstract: Diseases are much more pronounced in cultivated wild rice than in natural stands, most likely due to the narrower genetic base of the populations, plant stress due to high planting density and floodwater removal prior to harvest, and high relative humidity in the plant canopy. Yield losses occur as a result of reduced grain filling from reduced photosynthetic capacity from foliar diseases, lodging of stalks, reduced productivity or plant death from crown rots, and infection of grain. The major diseases of wild rice are: fungal brown spot, leaf sheath and stem rot, spot blotch, crown and root rot, bacterial brown spot, and bacterial leaf streak. A disorder called Johnson brown occurs on cultivars with the ‘Johnson’ genetic background. These plants are hyper-susceptible to foliar diseases and appear to lack basal disease resistance. This chapter provides information on disease symptoms, pathogen characteristics, and disease management practices for the major and minor diseases of wild rice.