Host-specific strain of Stemphylium causes leaf spot disease of California spinach
The California spinach industry has grown dramatically over the past few decades; it now supplies well over 100,000 tons of various high-quality products to consumers. But a new foliar disease. Stemphylium leaf spot, can reduce spinach quality. After identifying this disea...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of California Agriculture and Natural Resources
2001-09-01
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| Series: | California Agriculture |
| Online Access: | http://calag.ucanr.edu/archive/?article=ca.v055n05p31 |
| Summary: | The California spinach industry has grown dramatically over the past few decades;
it now supplies well over 100,000 tons of various high-quality products to consumers.
But a new foliar disease. Stemphylium leaf spot, can reduce spinach quality. After
identifying this disease, we determined that the pathogen may also be a new, distinct
strain of the fungus that is specific to spinach. Inoculation experiments demonstrated
that numerous spinach lines are susceptible, including new downy mildew-resistant
cultivars. Diagnosing this disease can be difficult because its symptoms often resemble
damage from agrochemicals. Growers and pest control advisors should become familiar
with the symptoms of the various foliar spinach diseases that occur in California
because consumers of this crop tolerate only a small level of leaf spots and defects. |
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| ISSN: | 0008-0845 2160-8091 |