Environmentally Safe Approaches to Crop Disease Control
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1997 by CRC Press LLC. Plant virus diseases cost producers billions of dollars each year by reducing crop yields and quality. For example, rice tungro causes $1.5 billion worth of damage to the rice crop in Southeast Asia annually, and rhizomania, caused by beet necrotic yellow vein virus (BNYVV), has been largely responsible for a 33% reduction in acreage planted to sugar beets in California since 1983 (Hull and Davies, 1992; Rush and Heidel, 1995a). Although producers minimize the impact of many virus diseases through a variety of management practices, introduction of new viruses and mutation of existing ones has continually challenged those involved in virus disease control.
