Phytoplasmas are pathogens of agriculturally-important plants, including coconut, sugarcane, and sandalwood, causing a wide variety of symptoms that range from mild yellowing to death of infected plants. They are most prevalent in tropical and sub-tropical regions of the world. Phytoplasmas require a vector to be transmitted from plant to plant, a...
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http://en.wikipedia.org/wiki/Phytoplasma
A prokaryotic, plant parasitic microorganism resembling a mycoplasma but not yet isolable in pure culture or characterized taxonomically.
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http://ppathw3.cals.cornell.edu/glossary/Defs_P.htm
Aster yellows is a chronic, systemic plant disease caused by a bacterium-like organism called a phytoplasma. The aster yellows phytoplasma (AYP) affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family, as well as important cereal crops such as wheat and barley.
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https://www.encyclo.co.uk/local/23353
Aster yellows is a chronic, systemic plant disease caused by a bacterium-like organism called a phytoplasma. The aster yellows phytoplasma (AYP) affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family, as well as important cereal crops such as wheat and barley.
Found on
https://www.encyclo.co.uk/local/23362
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