| plantsdb

RESULTS

(10)

DISEASE: Aster yellows

HOST: Barley

Infection by this phytoplasm causes twisted awns and sterile florets.

DISEASE: Aster yellows

HOST: Barley

Small necrotic spots on lower leaves and red coalescing streaks on upper leaves.

DISEASE: Bacterial bud and petal blight

HOST: Orchid

Miltonia orchid with brownish necrotic areas around edges of flower petals.

DISEASE: Bacterial bud and petal blight

HOST: Orchid

Miltonia orchid with diseased water-soaked flower buds.

DISEASE: Bacterial kernel blight (Leaf blight)

HOST: Barley

Dark, brown discolored kernels at the embryo end and posterior surface.

DISEASE: Bacterial leaf blight and rot

HOST: Orchid

Orchid hybrid (Miltonia × Bert Field 'Eileen') with water-soaked, discolored area near base of leaf.

DISEASE: Bacterial leaf blight

HOST: Barley

Diseased barley plants with typical bleaching of flag leaves. Initial symptoms are water-soaked lesions that later coalesce. Eventually, the entire leaf becomes necrotic and edges roll inward.

DISEASE: Bacterial wilt

HOST: Squash

Field with severe symptoms of wilt. Foliage often is chlorotic and leaf margins may be chlorotic and necrotic before plant death. Bacterial ooze may be seen streaming from the xylem when infected stems are cut.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Barley

Black chaff is characterized by water-soaked and darkened glumes on barley heads and streaks and stripes on leaves.