Aster Yellows
Something strange is happening to the Arboretum coneflowers… Several of the coneflower areas are showing odd protrusions, misshapen flower heads, stunted growth, and satellite flowers growing out of the disc. Unfortunately, these are all symptoms of a syndrome called Aster yellows. A Terminal Plant Disease Aster yellows is caused by a bacterium known as phytoplasma. […]
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