Cause Clover phyllody phytoplasma, formerly known as a mycoplasma-like organism. This organism is transmitted by a leafhopper. It is a problem on the variety, Ladino, and on red clover.
Symptoms The characteristic symptom is the reversion of floral parts into leaf-like organs. Plants also may be stunted, chlorotic, or bronzed. Nodulation may be reduced, and no seed is produced.
Cultural control
- If practical, seed clover in late summer or early fall to reduce the exposure period to insect vectors.
- Harvest forage or seed only 1 year, then rotate with cereals.
- Do not plant a new seeding adjoining an established field.
- Destroy clover plants on ditch banks or waste areas.