'Candidatus Phytoplasma mali'(PHYPMA)
Photos
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Leaves of AP infected trees (left) are smaller than normal ones (right) and have big stipules at the base of the stem.
Courtesy: Dr. Federico Bondaz, Plant Protection Unit of Val d'Aosta region (IT).
Witches’ broom caused by apple proliferation (AP) is particularly evident in winter time.
Courtesy: Dr. Federico Bondaz, Plant Protection Unit of Val d'Aosta region (IT).
Apples cv Jonagold from an healthy (left) and AP infected tree (right). Infected fruits are undersized, misshaped and irregularly coloured.
Courtesy: Dr. Federico Bondaz, Plant Protection Unit of Val d'Aosta region (IT).
Apple cv. Golden Delicious showing premature development of axillary buds resulting in a witches' broom near the apex of the main shoot in spring.
Courtesy: Institut für Pflanzenschutz im Obstbau, Dossenheim (DE).
Fruits of apple cv. Jonathan showing marked reduction in fruit size; longer, thinner peduncles and shallower calyx end and peduncular cavities; healthy fruit on right.
Courtesy: Institut für Pflanzenschutz im Obstbau, Dossenheim (DE).
Leaf of apple cv. Golden Delicious, showing reduced lamina size and enlarged stipules; healthy leaf on left.
Courtesy: Institut für Pflanzenschutz im Obstbau, Dossenheim (DE).
Witches broom on apple (cv. Golden Delicious).
Courtesy: Institut für Pflanzenschutz im Obstbau, Dossenheim (DE).
Enlarged stipules of apple leaf (cv. Golden Delicious), healthy leaf on right.
Courtesy: Institut für Pflanzenschutz im Obstbau, Dossenheim (DE).
Infected Malus domestica MM 106 rootstock
Courtesy: Paul Martens
Infected Malus domestica
Courtesy: Paul Martens
Malus domestica. Left: infected shoot. Right: healthy shoot
Courtesy: Paul Martens