DISEASE: Pear decline
HOST: Pear
'Bartlett' pears were grafted onto tolerant rootstock. All trees are infected. Note yellowish, diseased branches.
Pear decline | Pear
DISEASE: Pear decline
HOST: Pear (Pyrus communis 'Bartlett')
PATHOGEN: 'Candidatus Phytoplasma pyri'
PATHOGEN SYNONYM: Phytoplasma Apple proliferation group
SOURCE: C. Smart
DISEASE: Sumatra disease
HOST: Clove
Diseased tree with defoliation and dieback.
Sumatra disease | Clove
DISEASE: Sumatra disease
HOST: Clove (Syzygium aromaticum)
PATHOGEN: Ralstonia syzygii
SOURCE: A. Hayward
DISEASE: Witches'-broom
HOST: Lilac
Small tree with some chlorotic leaves and deliquescent branching.
Witches'-broom | Lilac
DISEASE: Witches'-broom
HOST: Lilac (Syringa × prestoniae)
PATHOGEN: 'Candidatus Phytoplasma fraxini'
PATHOGEN SYNONYM: Phytoplasma Ash yellows group
SOURCE: W. Sinclair