DISEASE: Bacterial leaf spot (Bacterial necrosis)
HOST: Cassava
Cassava with yellowish leaves and water-soaked, angular spots. The disease is primarily on foliage, although the pathogen may invade stem buds and young branches.
Bacterial leaf spot (Bacterial necrosis) | Cassava
DISEASE: Bacterial leaf spot (Bacterial necrosis)
HOST: Cassava (Manihot esculenta)
PATHOGEN: Xanthomonas cassavae
PATHOGEN SYNONYM: Xanthomonas campestris pv. cassavae
SOURCE: APS
DISEASE: Bacterial leaf spot (Bacterial necrosis)
HOST: Cassava
Cassava with brownish lesions and blackish edges. Leaves turn yellow with multiple infection sites.
Bacterial leaf spot (Bacterial necrosis) | Cassava
DISEASE: Bacterial leaf spot (Bacterial necrosis)
HOST: Cassava (Manihot esculenta)
PATHOGEN: Xanthomonas cassavae
PATHOGEN SYNONYM: Xanthomonas campestris pv. cassavae
SOURCE: H. Maraite, A. Alvarez
DISEASE: Bacterial leaf streak
HOST: Oat
Leaf with long, dark red streaks.
Bacterial leaf streak | Oat
DISEASE: Bacterial leaf streak
HOST: Oat (Avena sativa)
PATHOGEN: Xanthomonas translucens pv. cerealis
SOURCE: L. Claflin
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass
Lesions on leaves first appear as water-soaked, translucent, long, narrow streaks. They later turn brown and necrotic and often coalesce into blighted areas.
Black chaff (Bacterial leaf streak) | Wheatgrass
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass (Elytrigia intermedia)
PATHOGEN: Xanthomonas translucens pv. cerealis
SOURCE: S. Mohan
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass
Close-up of leaf with brown necrotic streaks.
Black chaff (Bacterial leaf streak) | Wheatgrass
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass (Elytrigia intermedia)
PATHOGEN: Xanthomonas translucens pv. cerealis
SOURCE: S. Mohan
DISEASE: Sour skin
HOST: Onion
Symptoms of sour skin are characterized by slimy, pale yellow to light brown decay.
Sour skin | Onion
DISEASE: Sour skin
HOST: Onion (Allium cepa)
PATHOGEN: Burkholderia cepacia
PATHOGEN SYNONYM: Pseudomonas cepacia
SOURCE: Dep. of Agric. & Agri-Food, Government of Canada
DISEASE: Sour skin
HOST: Onion
Characteristic pale yellow to browning of infected area.
Sour skin | Onion
DISEASE: Sour skin
HOST: Onion (Allium cepa)
PATHOGEN: Burkholderia cepacia
PATHOGEN SYNONYM: Pseudomonas cepacia
SOURCE: R. Gitaitis