Phytoplasma Resource Center
Phytoplasma Disease Symptoms Glossary
Phyllody - development of leaf-like growths in place of normal flower parts
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Virescence - development of green color in place of normal flower colors
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Witches broom - abnormal, excessive proliferation of axillary shoots resulting in a broom-like growths
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Yellowing - leaves lose normal green color, becoming yellows
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Little leaf - development of abnormally small leaves
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Proliferation - abnormal growth of numerous stems (shoots)
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Necrosis - death of cells and/or tissue
Dieback - generally refers to death of branches on woody plants, shrubs, trees; typically, young shoots, twigs, and distal portions of branches die progressively toward older plant part
Stunting - overall reduction of plant height due to shortening of internode
Bunchy top - shortening of internodes at and near the tip of a branch, resulting in bunched growth at the end of the branch