DISEASE: Aster yellows
HOST: Marigold
Infected plant (left) with yellowing and stunting.
![](/sites/default/files/plant_disease/images/0529.jpg)
Aster yellows | Marigold
DISEASE: Aster yellows
HOST: Marigold (Tagetes erecta)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: M. Shurtleff
DISEASE: Bacterial leaf spot
HOST: Turnip
Leaf with many tan, dry-appearing, angular spots.
![](/sites/default/files/plant_disease/images/0959.jpg)
Bacterial leaf spot | Turnip
DISEASE: Bacterial leaf spot
HOST: Turnip (Brassica rapa)
PATHOGEN: Xanthomonas campestris pv. armoraciae
SOURCE: R. Campbell
DISEASE: Bacterial soft rot
HOST: Turnip
Rotted root that likely was infected through cracks.
![](/sites/default/files/plant_disease/images/0958.jpg)
Bacterial soft rot | Turnip
DISEASE: Bacterial soft rot
HOST: Turnip (Brassica rapa)
PATHOGEN: Pectobacterium carotovorum
PATHOGEN SYNONYM: Erwinia carotovora subsp. carotovora
SOURCE: J. Togashi, M. Goto
DISEASE: Pseudomonas leaf spot
HOST: Marigold
Marigolds with yellow apical chlorosis attributed to toxin production by the pathogen.
![](/sites/default/files/plant_disease/images/0528.jpg)
Pseudomonas leaf spot | Marigold
DISEASE: Pseudomonas leaf spot
HOST: Marigold (Tagetes erecta)
PATHOGEN: Pseudomonas syringae pv. tagetis
SOURCE: R. Durbin