Aster yellows is a plant disease that affects a wide range of plants, including vegetables, ornamentals, and weeds. It is caused by a bacterium-like organism called a phytoplasma, which is spread by insects such as leafhoppers and planthoppers. The disease can cause stunted growth, yellowing of leaves, and abnormal flower development, among other symptoms.
Definitions
Aster yellows is a plant disease caused by a phytoplasma that affects a wide range of plants, including vegetables, ornamentals, and weeds. The disease is characterized by stunted growth, yellowing of leaves, and abnormal flower development, among other symptoms.
Origin
The origin of aster yellows is not clear, but it is believed to have originated in North America. The disease was first reported in the late 1800s and has since spread to many parts of the world.
Meaning in different dictionaries
- Merriam-Webster: a plant disease caused by a phytoplasma and characterized by stunted growth, yellowing of leaves, and abnormal flower development.
- Oxford English Dictionary: a disease of plants, especially of the aster family, caused by a phytoplasma and characterized by stunted growth, yellowing of leaves, and abnormal flower development.
- Dictionary.com: a disease of plants, especially of the aster family, characterized by stunted growth, yellowing of leaves, and abnormal flower development, caused by a phytoplasma.
Associations
Aster yellows is associated with a wide range of plants, including vegetables (such as carrots, lettuce, and onions), ornamentals (such as asters, coneflowers, and petunias), and weeds (such as dandelions and thistles). The disease is also associated with insects such as leafhoppers and planthoppers, which spread the phytoplasma from plant to plant.
Synonyms
- Witch’s broom.
- Phytoplasma disease.
- Yellow disease.
- Leafhopper disease.
Antonyms
There are no antonyms for aster yellows, as it is a plant disease.
The same root words
There are no root words associated with aster yellows.
Example Sentences
- The coneflowers in my garden have been infected with aster yellows, causing their flowers to become distorted and yellow.
- The carrot crop was devastated by aster yellows, resulting in stunted growth and yellowing of the leaves.
- The presence of leafhoppers in the garden is a sign that aster yellows may be a problem for your plants.
- The phytoplasma that causes aster yellows can survive in plant debris for several years, making it difficult to control the disease.