DISEASE: Aster yellows
HOST: Squash
Diagnostic characteristics for the disease are yellowing of young leaves, proliferation of secondary shoots, and rigid erect habit. Leaves are misshapen and smaller than normal and have stiff, thick laminae.
Aster yellows | Squash
DISEASE: Aster yellows
HOST: Squash (Cucurbita sp.)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Miller
DISEASE: Bacterial dieback of peach
HOST: Peach
Dark cankers on last year's twig. This leads to blighting of buds the following year.
Bacterial dieback of peach | Peach
DISEASE: Bacterial dieback of peach
HOST: Peach (Prunus persica)
PATHOGEN: Pseudomonas syringae pv. persicae
SOURCE: J. Young
DISEASE: Bacterial fruit blotch
HOST: Watermelon
Symptoms of external disease of mature watermelon.
Bacterial fruit blotch | Watermelon
DISEASE: Bacterial fruit blotch
HOST: Watermelon (Citrullus lanatus)
PATHOGEN: Acidovorax citrulli
PATHOGEN SYNONYM: Acidovorax avenae subsp. citrulli
SOURCE: R. X. Latin
DISEASE: Bacterial fruit blotch
HOST: Watermelon
Diseased watermelon with copious white foam.
Bacterial fruit blotch | Watermelon
DISEASE: Bacterial fruit blotch
HOST: Watermelon (Citrullus lanatus)
PATHOGEN: Acidovorax citrulli
PATHOGEN SYNONYM: Acidovorax avenae subsp. citrulli
SOURCE: R. Gitaitis
DISEASE: Bacterial leaf and stem necrosis
HOST: Watermelon
Seedlings with necrotic leaves and water-soaked stems.
Bacterial leaf and stem necrosis | Watermelon
DISEASE: Bacterial leaf and stem necrosis
HOST: Watermelon (Citrullus lanatus)
PATHOGEN: Pseudomonas viridiflava
SOURCE: Y. Aysan
DISEASE: Bacterial spot
HOST: Peach
Pitted fruit caused by late season infection.
Bacterial spot | Peach
DISEASE: Bacterial spot
HOST: Peach (Prunus persica)
PATHOGEN: Xanthomonas arboricola pv. pruni
PATHOGEN SYNONYM: Xanthomonas campestris pv. pruni
SOURCE: E. Zehr
DISEASE: Bacterial spot
HOST: Peach
Fruit infected late in the season.
Bacterial spot | Peach
DISEASE: Bacterial spot
HOST: Peach (Prunus persica)
PATHOGEN: Xanthomonas arboricola pv. pruni
PATHOGEN SYNONYM: Xanthomonas campestris pv. pruni
SOURCE: T. Burr
DISEASE: Bacterial spot
HOST: Peach
Reddish lesions on young twig (left). Dead buds are visible (right), the result of previous year's infection of twig.
Bacterial spot | Peach
DISEASE: Bacterial spot
HOST: Peach (Prunus persica)
PATHOGEN: Xanthomonas arboricola pv. pruni
PATHOGEN SYNONYM: Xanthomonas campestris pv. pruni
SOURCE: D. Ritchie
DISEASE: Bacterial spot
HOST: Peach
Leaves with water-soaked and necrotic spots.
Bacterial spot | Peach
DISEASE: Bacterial spot
HOST: Peach (Prunus persica)
PATHOGEN: Xanthomonas arboricola pv. pruni
PATHOGEN SYNONYM: Xanthomonas campestris pv. pruni
SOURCE: D. Ritchie