Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Ageratum > Malformed or distorted flowers
Ageratum > Flowers > Malformed or distorted flowers
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Aster Yellows
Phytoplasma
- Part or all of the leaves may turn yellow
- Flowers fail to develop, remain small green and may be distorted
- Clumps of weak shoots known as witches broom develop throughout the plant or on flower stalks
- More information on aster yellows
