Obligate, but non-pathogenic, parasite of Brassicaceae species and other hosts, it vectors plant pathogenic viruses which can produce necrosis, particularly in lettuce and tobacco.
Added by Christopher G.
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This parasite is also a vector for plant pathogenic viruses. Show more…
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1. Why are all viruses obligate parasites? What other types of plant pathogens are obligate parasites? 2. Give an example of a symptom caused by viruses that is (a) distinct from and (b) similar to those caused by other types of plant pathogens. Are symptoms useful for diagnosing virus diseases of plants? Why or why not? 3. What are the main characteristics of a plant virus? How do viruses differ from fungi, bacteria, and nematodes? Are viruses alive? Explain your answer. 4. Why is management of plant virus diseases almost always based on prevention, rather than cures?
Sri K.
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