Question

Which of the following plant diseases is caused by a virus?

• A. Curly top of sugar beets
• B. Aster yellows
• C. Barley yellow dwarf
• D. Both A and C
• E. All of the above

Answer 1

The correct option is D Both A and C

Beet curly top virus is a pathogenic plant virus of the family Geminiviridae, containing a single-stranded DNA. Aster yellows are caused by the aster yellows phytoplasma, a bacterium-like organism that lives in the food-conducting tissue (phloem) of plants. Barley yellow dwarf (BYD) is a worldwide virus disease of the most important grasses, including wheat, rice, and maize.

So, the correct answer is option D.