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RESULTS

(6)

DISEASE: Apple proliferation

HOST: Apple

Enlarged stipules on leaf. Witches'-brooms, rosettes, and enlarged stipules are the most reliable symptoms for identification.

DISEASE: Bacterial wilt

HOST: Custard apple

Custard apple with brown discoloration of vascular system, typical of wilt disease.

DISEASE: Bacterial wilt

HOST: Custard apple

Sudden death stage of wilt disease.

DISEASE: Bacterial wilt

HOST: Custard apple

Custard apple with brown, dead root tissues with necrotic speckles at the margin between healthy and diseased tissues.

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.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Close-up of leaf with brown necrotic streaks.