Tissue Proliferation
Non-pathogenic; genetic/physiological abnormality from tissue culture micropr...
1 host plant
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You might notice gall-like crown growths on micropropagated rhododendrons that look like wounds with excessive tissue formation. This physiological disorder stems from tissue-culture propagation imbalances, not infection. Plants often recover over time; growth is rarely severely affected. Rogue plants if desired, but provide good cultural conditions. The problem has largely disappeared with improved propagation techniques.
Provide good, nonaccelerated cultural conditions for rhododendron production. Affected plants may be rogued if desired.
Quick Reference
Management
High cytokinin levels in tissue culture media; certain genotypes predisposed; micropropagation techniques that increase hormone imbalances
Cultural Controls
- None known.
- Provide good, nonaccelerated cultural conditions for rhododendron production.
- Affected plants may be rogued if desired.
- Reference Linderman, R.G. and Benson, D.M. 2014.
- Compendium of Rhododendron and Azalea Diseases and Pests, 2nd ed.
- St.