SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following plant diseases is caused by a virus?
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Aster yellows
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Barley yellow dwarf
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Curly top of sugar beets
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All of the above
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Explanation:
Detailed explanation-1: -Mosaic diseases are caused by plant viruses, such as cucumber mosaic virus, that are mostly spread by insects, especially aphids and leafhoppers.
Detailed explanation-2: -The disease triangle points out that, three favorable conditions must coexist to cause a disease problem. These three are the virulent pathogen (one that can cause disease), a susceptible host (plant) and suitable environmental conditions.
Detailed explanation-3: -Infectious plant diseases are caused by bacteria, fungi, or viruses and can range in severity from mild leaf or fruit damage to death.
There is 1 question to complete.